CN107891634B - Composite material lattice interlayer double-skin cylindrical shell structure bearing internal pressure and containing metal lining and preparation process thereof - Google Patents
Composite material lattice interlayer double-skin cylindrical shell structure bearing internal pressure and containing metal lining and preparation process thereof Download PDFInfo
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- B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
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Abstract
A composite material lattice interlayer double-skin cylindrical shell structure bearing internal pressure and containing a metal lining and a preparation process thereof relate to a preparation process of a large-size automatic high-level lightweight pressure-bearing container and pipeline. The invention aims to solve the problems that the existing composite cylindrical shell cannot well realize organic unification of high strength, high rigidity and light weight, the conventional preparation process is complex and a large-scale structure is not easy to produce in batches. The preparation process adopted by the invention is as follows: the method comprises the following steps: winding preset fiber yarns on the metal lining in a winding machine to form an inner skin; step two: laying a dot matrix sandwich containing foam strips and corrugated ribs; step three: winding preset fiber yarns along the outer wall of the lattice sandwich to form an outer skin; step four: and (3) placing the structure in a curing furnace for curing to obtain the composite material lattice interlayer double-skin cylindrical shell structure containing the metal lining. The invention is suitable for a composite material lattice interlayer double-skin cylindrical shell structure containing a metal lining and a preparation process thereof.
Description
Technical Field
The invention relates to a preparation process of a large-size automatic high-level light-weight pressure-bearing container or pipeline, in particular to a preparation process of a composite material lattice interlayer double-skin cylindrical shell structure containing a metal lining and bearing internal pressure.
Background
At present, the pressure vessel in the petrochemical industry is developing towards high parameterization, which has higher and higher requirements on the strength and rigidity of materials, and the aerospace field puts forward the requirements on high strength, high rigidity, light weight and no leakage on a rocket fuel storage tank. Based on the requirement, the composite material lattice interlayer double-skin cylindrical shell structure with the all-metal lining and the preparation process thereof are established. The advantages are that: in terms of structure: firstly, the metal lining can be made of metal with higher corrosion resistance, so that the corrosion of the medium to the metal lining is reduced, and meanwhile, the compact metal lining can effectively prevent the medium from leaking; secondly, the strength requirement of the pressure container is met by utilizing the characteristics of high specific strength, specific modulus and anisotropy of the fiber material; and thirdly, the composite material sandwich structure provides enough rigidity, and the requirements of light weight and high rigidity are met. The preparation process comprises the following steps: firstly, realizing a preparation process of a metal-containing lining composite material sandwich structure with large size, high precision and high stability; and secondly, automatic production can be realized. Based on the characteristics, the structure can be applied to the fields of petrochemical large-scale storage tanks, reaction towers, reaction kettles, various aircraft fuel storage tanks, transportation storage tanks and the like.
The composite material cylindrical shell structure is a novel structure designed for meeting the requirements of light weight and multiple functions of engineering structures. At present, regarding the preparation of some composite material cylindrical shells, people only pay attention to the axial compression resistance of a shell structure, so that the radial rigidity of the shell structure and the influence of fiber materials on the annular pre-tightening of the shell are often ignored in the actual preparation process, namely the structures are not suitable for the field of pressure-bearing equipment. In addition, as for the preparation process of the lattice structure of the composite material, an integrated molding process and a secondary molding process have been proposed. The integrated molding process can solve the problem of bonding strength between the dot matrix core and the composite panel, but the preparation process of the integrated molding process is too dependent on manual operation, and automation is not easy to realize; the secondary forming process is easy to realize automation, but the lattice core monomers are combined with each other in a bonding mode, and the shear strength of the lattice structure of the composite material is low due to low bonding strength. Therefore, when manufacturing the lattice sandwich structure bearing the internal pressure and the lattice sandwich shell structure with the requirements of size and curvature radius, the performances of internal pressure resistance, axial pressure resistance, bending resistance, shear strength and the like of the high-parameter structure obtained by the conventional manufacturing process and the capability of automatic production are away from the expectation.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a composite material lattice interlayer double-skin cylindrical shell structure bearing internal pressure and containing a metal lining and a preparation process thereof, which can better solve the problems that the existing composite material interlayer cylindrical shell can not well realize organic unification of high internal pressure strength, high rigidity and light weight, has a complex preparation process, is not easy to realize large-scale, batch and automatic production, and has the problems of rough preparation process, easy defect generation in the preparation process and the like.
The technical scheme of the invention is as follows:
the utility model provides a bear two covering cylinder shell structures of combined material dot matrix intermediate layer that contains metal inside lining of internal pressure which characterized in that includes: thin wall metal inside lining (1), interior covering (2), dot matrix intermediate layer and outer skin (6), wherein, the dot matrix intermediate layer includes: a first specification foam strip (3), a second specification foam strip (4) and a corrugated rib (5); wherein, the inner skin (2) and the outer skin (6) are both made of composite materials; the outer wall of the metal lining (1) is an inner skin (2) made by winding fibers; the inner skin (2) is wound into a circle at intervals, the first specification foam strip (3) and the second specification foam strip (4) are fixed by the outer skin (6) to meet the rigidity requirement of the inner pressure thin-wall cylindrical shell metal lining composite material cylindrical shell, corrugated reinforcing ribs (5) are made of composite materials, the first specification foam strip (3), the second specification foam strip (4) and the corrugated ribs (5) are in gapless fit, and the outer skin (6) is made of fiber yarns wound by a winding machine.
The fiber yarn or the fiber cloth is carbon fiber, glass fiber or aramid fiber; the first-specification foam strip (3) and the second-specification foam strip (4) are made of PVC foam, PEI foam or PMI foam.
The parameters of the first specification foam strip (3) and the second specification foam strip (4) comprise an obtuse angle, a height, an upper bottom and a lower bottom, and the sizes of the first specification foam strip (3) and the second specification foam strip (4) respectively satisfy the following formulas:
specification one foam strip (3: obtuse angle θ 90+ 180/N; lower base:
and (3) bottom mounting:
two-specification foam strips (4: obtuse angle θ 90+ 180/N; lower base:
and (3) bottom mounting:
wherein T is the thickness of the corrugated rib; h is the height and R of the foam strip0The outer diameter of the inner skin.
A preparation process of a composite material lattice interlayer double-skin cylindrical shell structure bearing internal pressure and containing a metal lining is characterized by comprising the following steps:
the method comprises the following steps: winding a preset fiber layer on the thin-wall metal lining pipe (1) on a winding machine to form an inner skin (2);
step two: and preparing a lattice interlayer, wherein the interlayer is mainly formed by alternately arranging foam strips and fiber cloth (5) with two specifications and paving a circle of foam strips and fiber cloth in the circumferential direction of the inner skin (2) by mutually matching five special tools.
Step three: winding a preset fiber layer on the outer wall of the cylindrical shell with the laid dot matrix interlayer to form an outer skin;
step four: and (4) feeding the wound cylindrical shell into a curing furnace for curing to obtain the composite material lattice interlayer double-skin cylindrical shell structure containing the metal lining. The invention is suitable for preparing a composite material lattice interlayer double-skin cylindrical shell structure containing a metal lining.
The second step comprises the following steps:
preparing a lattice interlayer, wherein the interlayer is mainly formed by alternately arranging a first foam strip (3) with two specifications, a second foam strip (4) with two specifications and a corrugated rib (5) and paving a circle along the circumferential direction of an inner skin (2) by mutually matching five special tools, and the specific process of preparing the interlayer is as follows:
1) processing two foam strips (3) with the same number and different sizes of isosceles trapezoids on the upper and lower bottoms and two foam strips (4) with the different sizes of isosceles trapezoids on the upper and lower bottoms by a sawing machine, wherein the number of the foam strips is N, the number of the foam strips is one, the number of the foam strips is two, N is an even number, and N is not less than 16;
2) the upper bottom of the foam strip (3) with the first specification and the pre-soaked corrugated ribs (5) are fixed through a lower pressing plate (8) and an upper pressing plate (7), the foam strip and the upper pressing plate are arranged in a pairwise equidistant mode, the fiber cloth (5) is kept in a flat laying and straightening state, and the distance between the foam strips with the first specification (3) is L:
3) fixing the upper pressing plate (7), the lower pressing plate (8) and the specification-one foam strips (3) and the pre-soaked corrugated ribs (5) therebetween, and controlling the distance between the specification-one foam strips (3 to be L':
L′＝L2+L2′+2*T
4) placing the foam strip (4) of the second specification in a cavity formed by the pre-soaked corrugated ribs (5) at the distance L' in the previous step, and fixing the cavity by using a lower pressing plate (7) and an upper pressing plate (8) to form a rectangular plate with a specific length and width;
5) penetrating a long strip pressing plate (9) through a cavity of an upper pressing plate (7) and tightly pressing a specification one foam strip (3), a specification two foam strip (4) and a corrugated rib (5), taking out the upper pressing plate (7), and fixing the pre-soaked corrugated rib (5), the specification one foam strip (3) and the specification two foam strip (4) by using the long strip pressing plate (9) to replace the upper pressing plate (7);
6) uniformly installing special clamps 10 at two ends of the cylindrical shell with the inner skin (2) formed in the step one along the circumferential direction, enabling the distance between the clamps to be just capable of installing a specification one foam strip (3) and a specification two foam strip (4) with specific lengths, wherein the number of the clamps (10) at each end is N, which is the same as the number of the specification one foam strip (3) and the specification two foam strip (4);
7) horizontally placing a cylindrical shell with special fixtures (10) at two ends on the first foam strip of a tiled dot matrix rectangular foam board, keeping a pair of fixtures (10 aligned with the foam strips at the end part, automatically clamping the foam strips and a lower pressing plate (8) by the fixtures (10) through the gravity of the cylindrical shell, controlling the cylindrical shell to rotate towards the other end of the rectangular plate at a specific speed, and simultaneously controlling a long pressing plate (9) to pull out the rectangular plate at the same speed, so that the limitation of each foam strip by the long pressing plate (9) is realized before the foam strip is clamped by the fixtures at two ends of the cylindrical shell;
8) and (3) placing the composite material cylindrical shell with the circumferentially fixed dot matrix interlayer in a special radial support frame (11), driving a hydraulic rod to radially support and fix all the lower pressing plates (8), and removing the special clamps (10) at the two ends.
The third step comprises the following steps: preparing an outer skin (6), wherein the outer skin (6) is obtained by winding fiber yarns through a winding machine, slippage and looseness are not generated among a first specification foam strip (3), a second specification foam strip (4) and a corrugated rib (5) of a lattice interlayer in the winding process so as to ensure the dimensional accuracy of a final structure and prevent defects, and the specific preparation process of the outer skin (6) is as follows:
1) moving the radial support frame (11) and the lower pressing plate (8) to one end for a short distance together, and pre-winding the vacated short distance at the end part of the composite material cylindrical shell by a winding machine;
2) and controlling the speed of the radial support frame (11) and the lower bottom plate (8) moving towards one end to be the same as the axial winding speed of the winding machine, so that the composite material just vacated from the lower bottom plate is covered by the fiber layer, when the radial support frame (11) and the lower bottom plate (8) are completely separated from the cylindrical shell of the composite material, the winding machine finishes the first layer of fibers of the outer skin, and then continuously winding to finish the preparation of the outer skin (6) with a specific number of layers.
The fourth step comprises the following steps: and (3) placing the structure wound with the outer skin (6) in a curing furnace for curing to obtain the composite material lattice interlayer double-skin cylindrical shell structure bearing internal pressure and containing the metal lining.
The invention has the beneficial effects that:
the invention aims to solve the problems that the existing composite material lattice interlayer cylindrical shell can not well realize organic unification of high internal pressure strength, high rigidity and light weight, and the problems that the preparation process is complicated, is limited by the structure size and is not easy to produce in batch.
Firstly, the invention adopts a fiber winding mode to form an outer skin on the outer wall of the thin-wall metal lining, and can meet the requirement of strength and realize the purpose of light weight when bearing internal pressure.
Secondly, the preparation process of the lattice interlayer containing the corrugated reinforcing ribs can meet the requirements of large-scale and automatic production through a special fixture, and the relative positions of the fiber cloth and the foam strips are always fixed in the production process of the lattice interlayer, so that the process is not loosened, the precision of the prepared lattice interlayer is high, and the defects are few; the outer skin is made by winding fibers, and the lattice interlayer and the outer skin can provide enough rigidity for the whole structure so as to meet the requirement of the structure in a complex working environment; and finally, the whole structure is subjected to one-step curing molding, and the primary curing is carried out in a rotating mode, so that the fibers of all layers are uniformly soaked with resin.
Therefore, the composite material lattice interlayer double-skin cylindrical shell structure which is produced by the preparation process and bears the internal pressure and contains the metal lining has the advantages of high bonding strength among layers, high finished product quality and capability of meeting the task requirements of large-scale production and automatic production.
Drawings
FIG. 1 is a schematic view of a composite lattice sandwich double-skin cylindrical shell structure of a metal-containing lining for bearing internal pressure according to the present invention;
fig. 2(a), fig. 2(b) and fig. 2(c) are schematic diagrams of the preparation of a rectangular plate by tiling and arranging a dot matrix interlayer, wherein fig. 2(a) is a schematic diagram of the tiling and arranging manner of a foam strip of a specification one and a pre-impregnated fiber cloth, fig. 2(b) is a schematic diagram of the matching between a foam strip of a specification two and a foam strip of a specification one and a pre-impregnated fiber cloth, and fig. 2(c) is a schematic diagram of the matching between a prepared rectangular plate by tiling and three pressing plates of a dot matrix interlayer;
fig. 3(a), 3(b) and 3(c) are schematic diagrams of layering of tiled dot matrix rectangular plates along the circumferential direction of a cylindrical shell, wherein fig. 3(a) is a schematic diagram of circumferential layering of a dot matrix interlayer, fig. 3(b) is a schematic diagram of snap fit of a clamp and the interlayer, and fig. 3(c) is a schematic diagram of a structure of the laid dot matrix interlayer;
FIG. 4 is a schematic view of a portion of a lattice sandwich laid along the circumferential direction of a cylindrical shell;
fig. 5(a) and 5(b) are schematic diagrams of preparation of an outer skin formed by winding fibers, wherein fig. 5(a) is a schematic diagram of a special radial support frame installed on a cylindrical shell with a laid interlayer, the radial support frame is composed of N electric hydraulic rods uniformly arranged along the circumferential direction, and fig. 5(b) is a schematic diagram of a mode for preparing the outer skin.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
The first embodiment.
The composite material lattice interlayer double-skin cylindrical shell structure bearing internal pressure and containing the metal lining comprises: the thin-wall cylindrical metal lining comprises a thin-wall cylindrical metal lining, an inner skin, a dot matrix core and an outer skin, wherein the inner skin and the outer skin are both made of composite materials; according to the requirement of the strength of the internal pressure-bearing thin-wall metal lining cylindrical shell, the inner skin is made by winding fibers; the lattice core comprises corrugated reinforcing ribs and isosceles trapezoid foam strips, the corrugated reinforcing ribs and the foam strips uniformly encircle a circle along the outer wall of the inner skin, and the corrugated reinforcing ribs and the foam strips are fixed by the outer skin to meet the rigidity requirement of the metal lining composite material cylindrical shell of the internal pressure thin-wall cylindrical shell; the corrugated reinforcing ribs are made of composite materials; the foam strips are in gapless fit with the cavities of the corrugated reinforcing ribs; two adjacent foam strips are foam strips with isosceles trapezoid cross sections, the two foam strips have the same height and different upper and lower bottoms. The outer skin is made by winding fiber yarns by a winding machine.
The parameters of the foam strip comprise an obtuse angle, a height, an upper bottom and a lower bottom, and the dimensions of the foam strips with two specifications meet the following formula:
specification one (foam strip): the obtuse angle theta is 90+ 180/N; bottom:
and (3) bottom mounting:
specification two (foam strip): the obtuse angle theta is 90+ 180/N; bottom:
and (3) bottom mounting:
wherein T is the thickness of the corrugated rib; h is the height and R of the foam strip0The outer diameter of the inner skin.
As shown in fig. 1, the composite lattice sandwich double-skin cylindrical shell structure with metal lining for bearing internal pressure prepared in this embodiment includes: thin wall metal inside lining 1, interior covering 2, dot matrix intermediate layer and outer covering 6, wherein, the dot matrix intermediate layer includes: a first specification foam strip 3, a second specification foam strip 4 and a corrugated rib 5; wherein, the inner skin 2 and the outer skin 6 both adopt composite materials; the outer wall of the metal lining 1 is a fiber winding layer, namely an inner skin 2; the corrugated reinforcing ribs 5 and the adjacent foam strips 3 and 4 with two specifications uniformly encircle the outer wall of the inner skin 2 for a circle, and are fixed by the outer skin 6 to meet the rigidity requirement of the metal lining composite material cylindrical shell of the internal pressure thin-wall cylindrical shell; the corrugated reinforcing ribs 5 are made of composite materials; the foam strips are in gapless fit with the cavities of the corrugated reinforcing ribs; the outer skin 6 is made by winding fiber yarns by a winding machine;
the horizontal laying mode of the lattice sandwich core is shown in fig. 2(a), 2(b) and 2(c), and comprises a foam strip 3 with a first specification, a foam strip 4 with a second specification, a prepreg fiber cloth (corrugated ribs 5), an upper pressing plate 7, a lower pressing plate 8 and a long pressing plate 9; wherein, fig. 2(a) is a schematic diagram of the upper pressing plate 7, the lower pressing plate 8 and the foam strip 3 of the specification one in pair; FIG. 2(b) is a schematic diagram of a second-size foam strip 4, an upper platen 8 and a lower platen 9 cooperating to form a flat rectangular foam board; FIG. 2(c) shows an elongated platen 9 passing through the cavities of the side-by-side upper platens, and the rectangular foam board is fixed by the elongated platen 9 instead of the upper platen 7;
FIG. 3(a), FIG. 3(b) and FIG. 3(c) are the lattice sandwich core with curvature formed by winding the tiled lattice rectangular plate along the circular direction of the cylindrical shell. Comprises a clamp 10 with two symmetrical ends of a cylindrical shell; the clamp mainly comprises a hoop and a spring, a schematic diagram of a lattice interlayer circumferential laying mode is shown in fig. 3(a), a schematic diagram of a clamping fit between a clamp 10 and a lower pressing plate 8 of an interlayer is shown in fig. 3(b), and when the clamp is subjected to radial pressure of a foam strip, the clamp automatically clamps the foam strip and the lower pressing plate; FIG. 3(c) is a schematic structural diagram of the laid dot matrix interlayer;
FIG. 4 is a schematic view of the engagement of the corrugated ribs with two types of foam strips wrapped circumferentially around the cylindrical shell;
fig. 5(a) and 5(b) are schematic views illustrating the production of the outer skin 6, wherein fig. 5(a) is a schematic view illustrating the installation of the radial support structure 11, and fig. 5(b) is a schematic view illustrating the production of the outer skin 6.
The fiber yarn or fiber cloth of the present embodiment is carbon fiber, glass fiber, or aramid fiber; the foam strip is PVC, PEI or PMI foam.
Example two.
The preparation process of the composite material lattice interlayer double-skin cylindrical shell structure bearing internal pressure and containing the metal lining comprises the following steps:
step 1: winding a preset fiber layer on the thin-wall metal lining pipe 1 on a winding machine to form an inner skin 2;
step 2: preparing a lattice interlayer, wherein the interlayer is mainly formed by alternately arranging foam strips and fiber cloth 5 with two specifications and paving a circle of foam strips and fiber cloth along the annular direction of the inner skin 2 by mutually matching five special tools, and the specific process of preparing the interlayer is as follows:
1) two isosceles trapezoid foam strips 3 and 4 with equal quantity and different upper and lower bottoms are processed by a sawing machine, and the number of the isosceles trapezoid foam strips is N (the first specification and the second specification are even, N is not less than 16)
2) Fixing the upper bottom of the foam strip 3 with the specification I and the preimpregnated fiber cloth 5 through a lower pressing plate 8 and an upper pressing plate 7, arranging the fiber cloth 5 at equal intervals in pairs, keeping the fiber cloth 5 in a flat-laying and straightening state, and keeping the distance between the foam strips 3 with the specification I as L:
3) fixing the upper pressing plate 7, the lower pressing plate 8, the specification-one foam strips 3 and the pre-impregnated fiber cloth (corrugated ribs) 5, and controlling the distance between the specification-one foam strips 3 to be L':
L′＝L2+L2′+2*T
4) placing the foam strip 4 of the second specification in a cavity formed by the inward concave of the pre-soaked fiber cloth 5 at the distance L' in the previous step, and fixing the cavity by using a lower pressing plate 7 and an upper pressing plate 8 to form a rectangular plate with a specific length and width;
5) penetrating a long strip pressing plate 9 through a cavity of an upper pressing plate 7, pressing the foam strips 3 and 4 and the presoaked fiber cloth 5 tightly, taking out the upper pressing plate 7, and fixing the presoaked fiber cloth 5 and the foam strips 3 and 4 by using the long strip pressing plate 9 instead of the upper pressing plate 7;
6) uniformly installing special clamps 10 at two ends of the cylindrical shell with the inner skin 2 formed in the step one along the circumferential direction, so that the distance between the clamps can be just used for installing the foam strips 3 and 4 with specific lengths, wherein the number of the clamps 10 at each end is N, which is the same as the number of the foam strips 3 and 4;
7) horizontally placing a cylindrical shell with special clamps 10 at two ends on the first foam strip of a tiled dot matrix rectangular foam plate, keeping a pair of clamps 10 aligned with the foam strips at the end part, automatically clamping the foam strips and a lower pressing plate 8 by the clamps 10 through the self gravity of the cylindrical shell, controlling the cylindrical shell to rotate towards the other end of the rectangular plate at a specific speed and simultaneously controlling a long strip pressing plate 9 to draw out the rectangular plate at the same speed, and meeting the requirement that each foam strip is limited by the long strip pressing plate 9 before being clamped by the clamps at the two ends of the cylindrical shell;
8) placing the composite material cylindrical shell with the circumferentially fixed dot matrix interlayer in a special radial support frame 11, driving a hydraulic rod to radially support and fix all the lower pressing plates 8, and removing special clamps 10 at two ends;
and step 3: the cylindrical shell with the laid dot matrix interlayer is wound on a preset fiber layer along the outer wall to form an outer skin 6, slippage and looseness are not generated between foam strips 3 and 4 of the dot matrix interlayer and pre-impregnated fiber cloth (corrugated ribs) 5 in the winding process so as to guarantee the size precision of a final structure and prevent defects, and the specific preparation process of the outer skin 6 is as follows:
1) moving the radial support frame 11 and the lower pressing plate 8 to one end for a short distance together, and pre-winding the vacated small distance at the end part of the composite material cylindrical shell by a winding machine;
2) controlling the moving speed of the radial support frames 11 and the lower base plate 8 towards one end to be the same as the axial winding speed of the winding machine, so that the composite material just vacated from the lower base plate is covered by the fiber layer, when the radial support frames 11 and the lower base plate 8 are completely separated from the cylindrical shell of the composite material, completing the first layer of fiber of the outer skin by the winding machine, and then continuously winding to complete the preparation of the outer skin 6 with a specific number of layers;
and 4, step 4: and (3) placing the structure wound with the outer skin 6 in a curing furnace for curing to obtain the composite material lattice interlayer double-skin cylindrical shell structure bearing internal pressure and containing the metal lining.
Finally, it is noted that the disclosed embodiments are intended to aid in further understanding of the invention, but those skilled in the art will appreciate that: various substitutions and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the invention should not be limited to the embodiments disclosed, but the scope of the invention is defined by the appended claims.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (2)
1. The utility model provides a bear two covering cylinder shell structures of combined material dot matrix intermediate layer that contains metal inside lining of internal pressure which characterized in that includes: metal inside lining (1), interior covering (2), dot matrix intermediate layer and outer skin (6), wherein, the dot matrix intermediate layer includes: a first specification foam strip (3), a second specification foam strip (4) and a corrugated rib (5); wherein the outer wall of the metal lining (1) is an inner skin (2) made by winding fibers; the specification one foam strip (3) and the specification two foam strip (4) are spaced to surround a circle along the outer wall of the inner skin (2), a corrugated rib (5) is arranged between the specification one foam strip (3) and the specification two foam strip (4), and the corrugated rib is fixed by the outer skin (6) to meet the rigidity requirement of the composite material lattice interlayer double-skin cylindrical shell structure; the corrugated ribs (5) are made of composite materials; the first specification foam strip (3), the second specification foam strip (4) and the corrugated ribs (5) are in gapless fit; the outer skin (6) is made by winding fiber yarns by a winding machine; the dimensions of the first specification foam strip (3) and the second specification foam strip (4) respectively satisfy the following formula:
specification one foam strip (3): the obtuse angle theta is 90+ 180/N;
bottom:
and (3) bottom mounting:
standard two foam strip (4): the obtuse angle theta is 90+ 180/N;
bottom:
and (3) bottom mounting:
wherein N is the number of the first specification foam strips (3) and the second specification foam strips (4), and is an even number which is not less than 16; t is the thickness of the corrugated rib (5); h is the height of the foam strip and Ro is the inner skin outer diameter.
2. The composite lattice sandwich double-skin cylindrical shell structure bearing internal pressure and comprising the metal lining as claimed in claim 1, wherein: the material of the first specification foam strip (3) and the second specification foam strip (4) is PVC foam, PEI foam or PMI foam.
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