Web type composite foam sandwich socket flange and preparation process thereof

Abstract

The invention discloses a web type composite material foam sandwich socket flange and a preparation process thereof, and relates to the field of composite material foam sandwich structure connection, the web type composite material foam sandwich socket flange comprises a composite material web type foam sandwich cylinder, composite material web type foam sandwich stiffening ribs and a composite material flange plate; the composite material web plate type foam sandwich cylinder comprises a composite material inner cylinder wall, a composite material outer cylinder wall, a plurality of first foam plate strips and a plurality of first composite material webs; the composite material inner cylinder wall is in the shape of a hollow cylindrical cylinder body, and the bottom of the composite material inner cylinder wall is connected with a circular ring; according to the web type composite material foam sandwich socket flange and the preparation process thereof, resin infiltration is carried out, gaps of all components are filled and solidified into a whole, and the sandwich cylinder, the stiffening ribs and the flange part are integrated into a mechanical bearing system of the whole structure; the composite material web type foam sandwich stiffening ribs increase constraint and reinforcement on the end portion of the composite material web type foam sandwich cylinder, and the structural stability and the supporting efficiency of the device are improved.

Description

Technical Field

[0001] The invention relates to a composite material foam sandwich structure connection technology, in particular to a web-type composite material foam sandwich socket flange and a preparation process thereof. Background Art

[0002] The connection technologies of composite foam sandwich structures mainly include fusion welding, adhesive connection, hybrid connection, suture connection, and zp in connection. These technologies have their own advantages and disadvantages and are suitable for different application scenarios and needs. For composite foam sandwich tube / column structures with large bearing capacity application requirements, a connection method with high connection efficiency and large connection bearing capacity is urgently needed. In addition, the bearing capacity of composite foam sandwich tube / column structures is mainly restricted by local damage at the end and local buckling of the tube body. In order to solve the above problems, the present invention provides a web-type composite foam sandwich socket flange and a preparation process thereof.

[0003] In the Chinese invention patent with publication number CN201711078665.4, a lattice-reinforced composite foam sandwich support column and a preparation method thereof are disclosed. The lattice-reinforced composite foam sandwich support column and a preparation method thereof disclose a structure of a support column and a support flange. The support column body includes a cylindrical composite inner skin and a composite outer skin, foam strips are arranged between the composite inner skin and the composite outer skin, composite lattices are arranged between the foam strips, and the composite lattices are evenly distributed between the foam strips and connect the composite inner skin and the composite outer skin together; support surface connection flanges for connecting to the top structure or to another identical support column are arranged at both ends of the support column; end reinforcements are arranged at both ends of the outer skin of the support column.

[0004] However, the function of the support flange is limited to serving as a connecting component. It fails to be fully integrated into the overall mechanical bearing system of the structure, and lacks effective constraints and reinforcement effects on the ends of the structure, which to a certain extent reduces the structural stability and supporting efficiency of the entire support column. Summary of the invention

[0005] The purpose of the present invention is to provide a web-type composite foam sandwich socket flange and its preparation process, which can take into account the flange connection function, integrate with the structure to provide a restraining force at the end of the structure, and can also enhance the structural stability and supporting efficiency of the support column, avoiding the problem of a single function of the connecting flange.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a web-type composite foam sandwich socket flange, comprising a composite web-type foam sandwich tube, a composite web-type foam sandwich stiffening rib and a composite flange;

[0007] The composite web-type foam sandwich tube comprises a composite inner tube wall, a composite outer tube wall, a plurality of first foam strips and a plurality of first composite webs;

[0008] The composite material inner cylinder wall is in the shape of a hollow cylindrical cylinder body, with a circular ring connected to the bottom; the composite material outer cylinder wall is in the shape of a hollow cylindrical cylinder body, with a circular ring connected to the bottom; the outer diameter of the composite material outer cylinder wall body is larger than the outer diameter of the composite material inner cylinder wall body; the outer diameter of the composite material inner cylinder wall circular ring is the same as the outer diameter of the composite material outer cylinder wall circular ring; the composite material outer cylinder wall is sleeved on the outside of the composite material inner cylinder wall; a plurality of first foam strips are distributed in a circular array between the composite material inner cylinder wall and the composite material outer cylinder wall; a first composite material web is provided between two adjacent first foam strips; the first foam strips and the first composite material web are distributed at equal intervals; the first foam strips and the first composite material web are used to connect the composite material inner cylinder wall and the composite material outer cylinder wall;

[0009] The composite web-type foam sandwich stiffening rib is arranged on the outside of one end of the composite web-type foam sandwich tube, the composite web-type foam sandwich stiffening rib includes a composite outer wall, the composite outer wall has a Z-shaped cross-section, the composite outer wall is arranged on the outside of the composite outer tube wall, the top end of the composite outer wall is sleeved on the outside of the composite outer tube wall, the bottom end of the composite outer wall is located at the top of the composite outer tube wall ring, and is arranged parallel to the composite outer tube wall ring, a plurality of second foam strips are arranged between the composite outer wall and the composite outer tube wall, the plurality of second foam strips are distributed in a circular array, a second composite web is provided between two adjacent second foam strips, the second composite webs are distributed at equal intervals, the second foam strips and the second composite web are used to fill the gap between the composite outer wall and the composite outer tube wall, and connect the composite outer wall and the composite outer tube wall;

[0010] The composite material outer cylinder wall is circumferentially sleeved with a composite material neck band, the inner side of the composite material neck band is sleeved on the outer side of the top end of the composite material outer wall, and the composite material neck band is used to circumferentially reinforce the composite material outer wall and the composite material outer cylinder wall, increase the interlayer bonding, and improve the bearing capacity of the composite material web-type foam sandwich stiffening rib;

[0011] The composite material flange is arranged at the bottom end of the composite material inner cylinder wall, the outer diameter of the composite material flange is the same as the outer diameter of the composite material inner cylinder wall ring, the outer side of the composite material outer wall is sleeved with a metal ring sheet, the metal ring sheet is located at the top of the bottom end of the composite material outer wall, the bottom of the composite material flange is provided with a plurality of through holes in a circumferential array, the through holes sequentially penetrate the composite material flange, the ring of the composite material inner cylinder wall, the ring of the composite material outer cylinder wall and the bottom end of the composite material outer wall, the inner wall of the through hole is fixedly installed with a composite material nut, the metal ring sheet is penetrated with a mounting hole equidistant from the through hole opened on the composite material flange, the metal ring sheet is used for axially reinforcing the bottom end of the composite material outer wall and the composite material outer cylinder wall ring, increasing the interlayer bonding, and improving the bearing capacity of the composite material web-type foam sandwich stiffening rib.

[0012] Furthermore, the materials of the composite inner tube wall, the composite outer tube wall, the first composite web, the composite outer wall, the second composite web, the composite flange and the composite nut are all made of fiber-reinforced resin-based composite materials, the reinforcing material in the fiber-reinforced resin-based composite material is one or more of glass fiber cloth, carbon fiber cloth, basalt fiber cloth and aramid fiber cloth, and the resin in the fiber-reinforced resin-based composite material is one or more of epoxy resin, phenolic resin and polyurethane resin.

[0013] Furthermore, the cross-section of the first foam strip is an isosceles trapezoid, the second foam strip is a right-angled triangle plate, the material of the first foam strip and the second foam strip are one or more of PVC foam, PMI foam, PU foam or PEI foam, the cross-section of the first composite material web is a rectangle, and the second composite material web is a right-angled triangle plate.

[0014] Furthermore, the inner diameter of the composite material inner cylinder wall is 50-1000mm, and the height is 50-500mm. The thickness of the composite material inner cylinder wall and the composite material outer cylinder wall are the same or different. The thickness of the composite material inner cylinder wall is 2-10mm, the thickness of the composite material outer cylinder wall is 2-10mm, the thickness of the first foam strip is 10-100mm, and the thickness of the first composite material web is 2-10mm.

[0015] Furthermore, the thickness of the composite material outer wall is 3-10 mm, the thickness of the second foam strip is 10-100 mm, and the thickness of the second composite material web is 3-10 mm.

[0016] Furthermore, the thickness of the composite flange is 5-10mm, the wall thickness of the composite nut is 5-10mm, the height dimension of the composite nut is the same as the thickness dimension of the composite flange and the composite inner cylinder wall ring, the composite outer cylinder wall ring, and the composite outer wall bottom end ring superimposed, the thickness of the metal ring sheet is 1-2mm, and the outer diameter dimension of the metal ring sheet is the same as the outer diameter dimension of the composite flange.

[0017] Furthermore, the thickness of the composite material neckband is 1-2 mm, and the height of the composite material neckband is 50-100 mm.

[0018] A web-type composite foam sandwich socket flange preparation process is applicable to the web-type composite foam sandwich socket flange, the web-type composite foam sandwich socket flange preparation process is used to prepare the web-type composite foam sandwich socket flange, and the web-type composite foam sandwich socket flange preparation process includes:

[0019] S1. Prepare several foam flat plates, several fiber cloths, several fiber filaments, cylindrical core molds, mold release agents, plastic films, plastic sprays, metal rings and several composite material nuts;

[0020] S2. According to the size design requirements, the foam flat plate is cut into a plurality of first foam strips with trapezoidal cross sections and a plurality of second foam strips with right-angled triangular plates;

[0021] S3, cutting the fiber cloth into a plurality of blocks that are completely consistent with the side shape and size of the first foam strip to obtain a plurality of first composite webs, fixing the first composite webs and the first foam strips together through fiber filaments in a one-to-one correspondence to obtain first web strips, cutting the fiber cloth into a plurality of blocks that are completely consistent with the side shape and size of the second foam strip to obtain a plurality of second composite webs, fixing the second composite webs and the second foam strips together through fiber filaments in a one-to-one correspondence to obtain second web strips;

[0022] S4. After applying a release agent and a plastic film on the cylindrical core mold, first evenly wrap the mold with fiber cloth, and then turn the bottom end of the wrapped fiber cloth outward along the circumferential direction to form a bottom circular ring, and then use the fiber cloth to reinforce the circular ring obtained after the flanging up and down to ensure that the circular ring is uniform and continuous, so as to obtain the inner cylinder wall of the composite material, and then closely arrange a plurality of first web plate strips along the circumferential direction on the outer side of the inner cylinder wall of the composite material, and use fiber filaments to bind and fix the plurality of first web plate strips to the inner cylinder wall of the composite material, and then evenly wrap the outer side of the plurality of first web plate strips after fixation with fiber cloth, and then turn the bottom end of the wrapped fiber cloth outward along the circumferential direction to form a bottom circular ring, and then use the fiber cloth to reinforce the circular ring obtained after the flanging up and down to ensure that the circular ring is uniform and continuous, so as to obtain the inner cylinder wall of the composite material, and then wrap the fiber cloth on the bottom of the bottom circular ring of the outer cylinder wall of the composite material until it reaches the edge of the bottom circular ring of the outer cylinder wall of the composite material, so as to obtain the flange of the composite material;

[0023] S5. Arrange the second web slats tightly on the outside of the composite material outer tube wall along the circumferential direction and locate them on the top of the bottom circular ring of the composite material outer tube wall, then use fiber filaments to tie and fix a plurality of second web slats on the outside of the composite material outer tube wall, use fiber cloth to completely cover the outside of the second web slats, extend the top of the reinforcement material of the composite material outer wall upward along the outside of the composite material outer tube wall, and turn the bottom of the reinforcement material of the composite material outer wall outward along the radial direction of the composite material flange to the edge of the bottom circular ring of the composite material outer tube wall to obtain the composite material outer wall;

[0024] S6, a flange portion is formed by a composite material outer cylinder wall ring, a composite material outer cylinder wall ring, a ring obtained by radially flanging the composite material outer wall, and a composite material flange plate, and a gap in the reinforcing material constituting the flange portion is artificially expanded, and composite material nuts are pre-embedded in the holes to obtain a flange portion with composite material nuts;

[0025] S7, grinding the contact surface between the metal ring and the flange to ensure that the surface is rough enough, and then placing it on the upper surface of the flange, using fiber cloth to wrap and reinforce the overlapping part between the composite material outer wall and the composite material outer tube wall to obtain a composite material neck band, and finally obtaining a web-type composite foam sandwich socket flange preform;

[0026] S8, prepare a release cloth, a guide net, a spiral tube, a vacuum bag, an overflow hose and a container filled with resin;

[0027] S9, on the outside of the web-type composite foam sandwich socket flange preform made in S7, a demoulding cloth, a flow guide net, a glue injection port, a vacuum port, and a spiral tube are sequentially arranged, and finally a vacuum bag is used to package it on a cylindrical core mold to form a sealing system;

[0028] S10, connect the air extraction port to the vacuum system with a rubber overflow hose, evacuate the sealing system, check the air tightness of the closed system, and after confirming that the air tightness is good, connect the glue injection port to the container containing the resin system with a glue injection hose, and draw the resin into the closed system under negative pressure. The resin evenly infiltrates the fiber cloth through the spiral tube and the guide net and fills the gap between the foam and the fiber cloth, and is cured and formed;

[0029] S11. Use the push-out method to take the mold out of the solidified molded body, remove the vacuum bag, guide net, demoulding cloth, spiral tube on the molded body in turn, grind the burrs, and finally obtain the web-type composite foam sandwich socket flange.

[0030] Compared with the prior art, the present invention provides a web-type composite foam sandwich socket flange and a preparation process thereof. A composite sandwich tube is made by arranging a first web plate strip and a first foam plate strip between the composite inner tube wall and the composite outer tube wall for filling, thereby improving the overall rigidity of the structure. A composite web-type foam sandwich stiffening rib is made by arranging a second web plate strip and a second foam plate strip between the composite outer tube wall and the composite outer tube wall. The composite web-type foam sandwich stiffening rib is sleeved on the outside of the composite sandwich tube to constrain and strengthen the end of the composite sandwich tube, and the composite sandwich tube and the composite web-type foam sandwich stiffening rib are subjected to the same stress and deformation under the influence of external force, thereby achieving the purpose of dispersing and resisting external force and improving the overall bearing capacity of the structure.

[0031] The metal ring piece is used to improve the rigidity of the composite material flange part and improve the anti-peeling ability between the bottom end of the composite material outer wall and the flange part. The composite material neck band is used to reinforce the overlap between the composite material outer wall and the sandwich tube to improve the anti-peeling ability between the two layers.

[0032] Artificially expanding the holes in the composite flange and pre-embedding composite nuts during the preforming stage can avoid secondary drilling after solidification to damage the fiber continuity, and can also reinforce the expanded hole with composite bolts;

[0033] Through resin infiltration, the gaps of all components are filled and solidified into a whole. The sandwich tube, stiffening ribs and flange parts are integrated into the mechanical bearing system of the whole structure. The composite web foam sandwich stiffening ribs increase the constraints and reinforcement on the ends of the composite web foam sandwich tube, thereby improving the structural stability and supporting efficiency of the device.

[0034] The composite web-type foam sandwich tube is used for inserting the connected body, which can not only realize the formation of an integrated structure between the connected part and the composite web-type foam sandwich socket flange, but also strengthen the end of the connected part to ensure the bearing capacity of the connected body. At the same time, in order to avoid interlayer slippage between the inner tube wall of the sandwich tube and the connected part, a special composite adhesive should be applied to the insertion end of the connected part before insertion.

[0035] The above technical solution realizes a composite foam sandwich structure socket flange with light overall weight, high strength, large bearing capacity, low manufacturing cost and high performance, so that the stiffness, deformation and force of the connecting part and the connected part are coordinated. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0037] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0038] Figure 2 A schematic longitudinal section diagram of the overall structure provided by an embodiment of the present invention;

[0039] Figure 3 A partial structural schematic diagram provided for an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the structure of a first foam strip and a first composite material web provided in an embodiment of the present invention;

[0041] Figure 5 Schematic diagram of the second foam strip and the second composite material web structure provided in an embodiment of the present invention.

[0042] Description of reference numerals:

[0043] 1. Composite material inner tube wall; 2. Composite material outer tube wall; 3. First foam strip; 4. First composite material web; 5. Composite material outer wall; 6. Second foam strip; 7. Second composite material web; 8. Composite material flange; 9. Composite material nut; 10. Metal ring; 11. Composite material neck band. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] Embodiment 1:

[0046] See also Figure 1-Figure 4 , a web-type composite foam sandwich socket flange, comprising a composite web-type foam sandwich tube, a composite web-type foam sandwich stiffening rib and a composite flange 8;

[0047] The composite web-type foam sandwich tube comprises a composite inner tube wall 1, a composite outer tube wall 2, a plurality of first foam strips 3 and a plurality of first composite webs 4;

[0048] The composite material inner cylinder wall 1 is shaped like a hollow cylindrical cylinder body, and a circular ring is connected to the bottom; the composite material outer cylinder wall 2 is shaped like a hollow cylindrical cylinder body, and a circular ring is connected to the bottom; the outer diameter of the cylinder body of the composite material outer cylinder wall 2 is larger than the outer diameter of the cylinder body of the composite material inner cylinder wall 1; the outer diameter of the circular ring of the composite material inner cylinder wall 1 is the same as the outer diameter of the circular ring of the composite material outer cylinder wall 2; the composite material outer cylinder wall 2 is sleeved on the outside of the composite material inner cylinder wall 1; a plurality of first foam strips 3 are distributed in a circular array between the composite material inner cylinder wall 1 and the composite material outer cylinder wall 2; a first composite material web 4 is provided between two adjacent first foam strips 3; the first foam strips 3 and the first composite material web 4 are distributed at equal intervals; the first foam strips 3 and the first composite material web 4 are used to connect the composite material inner cylinder wall 1 and the composite material outer cylinder wall 2;

[0049] The composite material web-type foam sandwich stiffening rib is arranged on the outside of one end of the composite material web-type foam sandwich tube, and the composite material web-type foam sandwich stiffening rib includes a composite material outer wall 5, the cross-section of the composite material outer wall 5 is Z-shaped, the composite material outer wall 5 is arranged on the outside of the composite material outer tube wall 2, the top end of the composite material outer wall 5 is sleeved on the outside of the composite material outer tube wall 2, the bottom end of the composite material outer wall 5 is located at the top of the circular ring of the composite material outer tube wall 2, and is arranged parallel to the circular ring of the composite material outer tube wall 2, a plurality of second foam strips 6 are arranged between the composite material outer wall 5 and the composite material outer tube wall 2, the plurality of second foam strips 6 are distributed in a circular array, a second composite material web 7 is arranged between two adjacent second foam strips 6, and the second composite material webs 7 are distributed at equal intervals, and the second foam strips 6 and the second composite material webs 7 are used to fill the gap between the composite material outer wall 5 and the composite material outer tube wall 2, and connect the composite material outer wall 5 and the composite material outer tube wall 2;

[0050] The composite material outer cylinder wall 2 is circumferentially sleeved with a composite material neck band 11, and the inner side of the composite material neck band 11 is sleeved on the outer side of the top of the composite material outer wall 5. The composite material neck band 11 is used to circumferentially reinforce the top of the composite material outer wall 5 and the composite material outer cylinder wall 2, increase the interlayer bonding, and improve the bearing capacity of the composite material web-type foam sandwich stiffening rib;

[0051] A composite flange 8 is arranged at the bottom end of the composite inner cylinder wall 1. The outer diameter of the composite flange 8 is the same as the outer diameter of the circular ring of the composite inner cylinder wall 1. A metal ring sheet 10 is sleeved on the outside of the composite outer wall 5. The metal ring sheet 10 is located at the top of the bottom end of the composite outer wall 5. A plurality of through holes are opened in a circular array at the bottom of the composite flange 8. The through holes penetrate the composite flange 8, the circular ring of the composite inner cylinder wall 1, the circular ring of the composite outer cylinder wall 2 and the bottom end of the composite outer wall 5 in sequence. A composite nut 9 is fixedly installed on the inner wall of the through hole. The metal ring sheet 10 penetrates and opens a mounting hole equidistant from the through hole opened in the composite flange 8. The metal ring sheet 10 is used to axially reinforce the bottom end of the composite outer wall 5 and the circular ring of the composite outer cylinder wall 2, increase the interlayer bonding, and improve the bearing capacity of the composite web-type foam sandwich stiffening rib.

[0052] The specific implementation is as follows: the size of the composite material outer cylinder wall 2 is larger than the size of the composite material inner cylinder wall 1, and the first foam strips 3 and the first composite material webs 4 are alternately filled between the composite material outer cylinder wall 2 and the composite material inner cylinder wall 1. The size of the first foam strips 3 is larger than the size of the first composite material webs 4. The longitudinal surface of the first composite material webs 4 is closely attached to the outer side of the composite material inner cylinder wall 1 on one side and closely attached to the inner side of the composite material outer cylinder wall 2 on the other side. During the production, resin is injected to fill the remaining gaps. At the same time, after the resin solidifies, the first foam strips 3, the first composite material webs 4, the inner side of the composite material outer cylinder wall 2 and the outer side of the composite material inner cylinder wall 1 are solidified into a whole. After a plurality of second foam strips 6 and second composite material webs 7 are fixed in pairs, they are coated on the outer side of the composite material outer cylinder wall 2 to form a cone, and then the composite material outer wall 5 is coated on the outer side of the cone formed by the second foam strips 6 and the second composite material webs 7. The composite material outer wall 5 is formed as a whole by injecting resin, and the gaps are filled and the adjacent components are solidified. Together, the composite neck band 11 is sleeved on the outside of the top connection part of the composite outer tube wall 2 and the composite outer wall 5, and is used for circumferential reinforcement during use, and increases the interlayer bonding between the contact surfaces of the composite inner tube wall 1, the composite outer tube wall 2, the first foam strip 3, the first composite web 4 and the composite outer wall 5. The flange part has a built-in composite nut 9, which is used to connect with a reserved base, and can also be used to connect with the flange part on another web-type composite foam sandwich socket flange. The metal ring piece 10 is placed on the upper side of the bottom end of the composite outer wall 5 and is located above the flange part. The metal ring piece 10 can axially reinforce the bottom end of the web-type foam sandwich stiffening rib and the bottom end of the composite web-type foam sandwich tube, increase the interlayer bonding between the contact surfaces of the composite inner tube wall 1, the composite outer tube wall 2, the first foam strip 3, the first composite web 4, the composite outer wall 5, the second foam strip 6 and the second composite web 7, and at the same time improve the overall stiffness of the flange part.

[0053] The cross-section of the first foam slat 3 is an isosceles trapezoid, and the second foam slat 6 is a right-angled triangle plate. The material of the first foam slat 3 and the second foam slat 6 are one or more of PVC foam, PM I foam, PU foam or PE I foam, and the cross-section of the first composite material web 4 is a rectangle.

[0054] The first foam strip 3 and the second foam strip 6 are made of one or more of PVC foam, PM I foam, PU foam or PE I foam to meet different heat insulation and strength requirements.

[0055] The inner diameter of the composite inner cylinder wall 1 is 50-1000mm, and the height is 50-500mm. The thickness of the composite inner cylinder wall 1 and the composite outer cylinder wall 2 are the same or different. The thickness of the composite inner cylinder wall 1 is 2-10mm, the thickness of the composite outer cylinder wall 2 is 2-10mm, the thickness of the first foam strip 3 is 10-100mm, and the thickness of the first composite web 4 is 2-10mm.

[0056] The composite inner tube wall 1 and the composite outer tube wall 2 can have the same or different thicknesses according to specific needs. The material of the first composite web 4 is the same as that of the composite inner tube wall 1 and the composite outer tube wall 2 to ensure the strength and stability of the overall structure.

[0057] The thickness of the composite material outer wall 5 is 3-10 mm, the thickness of the second foam strip 6 is 10-100 mm, and the thickness of the second composite material web 7 is 3-10 mm.

[0058] The composite material outer wall 5 is the same as the composite material inner tube wall 1 and the composite material outer tube wall 2, which enhances the external protection capability of the tube wall structure. The material of the second foam strip 6 is the same as that of the first foam strip 3, which ensures the consistency of heat insulation and strength.

[0059] The thickness of the composite flange 8 is 5-10mm, the wall thickness of the composite nut 9 is 5-10mm, the height dimension of the composite nut 9 is the same as the thickness dimension of the composite flange 8 and the bottom ring of the composite inner cylinder wall 1, the composite outer cylinder wall 2 ring, and the bottom end ring of the composite outer wall 5. The thickness of the metal ring sheet 10 is 1-2mm, and the outer diameter dimension of the metal ring sheet 10 is the same as the outer diameter dimension of the composite flange 8.

[0060] The material of the composite flange 8 is the same as that of the composite inner tube wall 1, the composite outer tube wall 2, etc., to ensure the strength and connection reliability of the flange. The height of the composite nut 9 is the same as the thickness of the flange part, to ensure a close fit between the composite nut 9 and the flange part. The metal ring 10 has the same outer diameter as that of the composite flange 8.

[0061] The thickness of the composite material neck band 11 is 1-2 mm, and the height of the composite material neck band 11 is 50-100 mm.

[0062] The composite neckband 11 is made of the same material as the composite inner tube wall 1 , the composite outer tube wall 2 , etc., and is used to enhance the integrity and stability of the tube wall structure.

[0063] Embodiment 2:

[0064] See also Figure 1-Figure 5 This embodiment provides a technical solution based on the first embodiment: the materials of the composite inner tube wall 1, the composite outer tube wall 2, the first composite web 4, the composite outer wall 5, the second composite web 7, the composite flange 8 and the composite nut 9 are all made of fiber-reinforced resin-based composite materials, the reinforcing material in the fiber-reinforced resin-based composite material is one or more of glass fiber cloth, carbon fiber cloth, basalt fiber cloth and aramid fiber cloth, and the resin in the fiber-reinforced resin-based composite material is one or more of epoxy resin, phenolic resin and polyurethane resin.

[0065] The inner diameter, height and thickness of the composite inner cylinder wall 1 are determined according to specific design requirements. The outer diameter, height and thickness of the composite outer cylinder wall 2 are determined according to the design parameters of the composite inner cylinder wall 1. The cross-section of the first composite web 4 is rectangular, and the second composite web 7 is a right-angled triangle plate. Its size and thickness are determined according to strength and stability requirements. The outer diameter, thickness and bolt hole positions of the composite flange 8 are determined according to connection requirements. The size and wall thickness of the composite nut 9 are determined according to the bolt hole size of the flange part to ensure a close fit with the flange part.

[0066] Embodiment three:

[0067] A web-type composite foam sandwich socket flange preparation process, including the web-type composite foam sandwich socket flange preparation process for preparing a web-type composite foam sandwich socket flange, the web-type composite foam sandwich socket flange preparation process comprising:

[0068] S1, prepare a plurality of foam flat plates, a plurality of fiber cloths, a plurality of fiber filaments, a cylindrical core mold, a mold release agent, a plastic film, a plastic spray, a metal ring sheet 10 and a plurality of composite material nuts 9;

[0069] S2. According to the size design requirements, the foam flat plate is cut into a plurality of first foam strips 3 with trapezoidal cross sections and a plurality of second foam strips 6 with right-angled triangular plates;

[0070] S3, cutting the fiber cloth into a plurality of blocks that are completely consistent with the side shape and size of the first foam strip 3, obtaining a plurality of first composite webs 4, fixing the first composite webs 4 and the first foam strip 3 together through fiber filaments in a one-to-one correspondence, obtaining a first web strip, cutting the fiber cloth into a plurality of blocks that are completely consistent with the side shape and size of the second foam strip 6, thereby obtaining a plurality of second composite webs 7, fixing the second composite webs 7 and the second foam strip 6 together through fiber filaments in a one-to-one correspondence, obtaining a second web strip;

[0071] S4. After applying a release agent and a plastic film on the cylindrical core mold, first evenly wrap the mold with fiber cloth, and then turn the bottom end of the wrapped fiber cloth outward along the circumferential direction to form a bottom circular ring, and then use the fiber cloth to reinforce the circular ring obtained after the flanging up and down to ensure that the circular ring is uniform and continuous, so as to obtain the composite material inner cylinder wall 1, and then arrange a plurality of first web plate strips tightly along the circumferential direction on the outside of the composite material inner cylinder wall 1, and use fiber filaments to tie and fix the plurality of first web plate strips to the composite material inner cylinder wall 1, and then evenly wrap the fiber cloth on the outside of the fixed plurality of first web plate strips, and then turn the bottom end of the wrapped fiber cloth outward along the circumferential direction to form a bottom circular ring, and then use the fiber cloth to reinforce the circular ring obtained after the flanging up and down to ensure that the circular ring is uniform and continuous, so as to obtain the composite material inner cylinder wall 2, and then wrap the fiber cloth on the bottom of the bottom circular ring of the composite material outer cylinder wall 2 until it reaches the edge of the bottom circular ring of the composite material outer cylinder wall 1, so as to obtain the composite material flange 8;

[0072] S5. Arrange the second web slats tightly on the outside of the composite material outer tube wall 2 along the circumferential direction and be located at the top of the bottom ring of the composite material outer tube wall 2, then use fiber filaments to tie and fix a plurality of second web slats on the outside of the composite material outer tube wall 2, use fiber cloth to completely cover the outside of the second web slats, extend the top of the reinforcement material of the composite material outer wall 5 upward along the outside of the composite material outer tube wall 2, and turn the bottom of the reinforcement material of the composite material outer wall 5 outward along the radial direction of the composite material flange 8 to the edge of the bottom ring of the composite material outer tube wall 2 to obtain the composite material outer wall 5;

[0073] S6, the composite material outer cylinder wall 1 ring, the composite material outer cylinder wall 2 ring, the composite material outer wall 5 radially outwardly flanged ring and the composite material flange 8 together constitute a flange portion, the reinforcing material gap constituting the flange portion is artificially expanded, and the composite material nut 9 is pre-embedded in the hole to obtain a flange portion with the composite material nut 9;

[0074] S7, grinding the contact surface between the metal ring sheet 10 and the flange part to ensure that the surface is rough enough, and then placing it on the upper surface of the flange part, using fiber cloth to wrap and reinforce the overlapping part between the composite material outer wall 5 and the composite material outer tube wall 2 to obtain the composite material neck band 11, and finally obtain the web-type composite foam sandwich socket flange preform;

[0075] S8, prepare a release cloth, a guide net, a spiral tube, a vacuum bag, an overflow hose and a container filled with resin;

[0076] S9, on the outside of the web-type composite foam sandwich socket flange preform made in S7, a demoulding cloth, a flow guide net, a glue injection port, a vacuum port, and a spiral tube are sequentially arranged, and finally a vacuum bag is used to package it on a cylindrical core mold to form a sealing system;

[0077] S10, connect the air extraction port to the vacuum system with a rubber overflow hose, evacuate the sealing system, check the air tightness of the closed system, and after confirming that the air tightness is good, connect the glue injection port to the container containing the resin system with a glue injection hose, and draw the resin into the closed system under negative pressure. The resin evenly infiltrates the fiber cloth through the spiral tube and the guide net and fills the gap between the foam and the fiber cloth, and is cured and formed;

[0078] S11. Use the push-out method to take the mold out of the solidified molded body, remove the vacuum bag, guide net, demoulding cloth, spiral tube on the molded body in turn, grind the burrs, and finally obtain the web-type composite foam sandwich socket flange.

[0079] The specific implementation method is as follows: the release agent is industrial vaseline, which is evenly applied to the outside of the cylindrical core mold, and a side of glass paper is rolled on the outside of the vaseline for isolation, and the fiber cloth is flattened, and then the fiber cloth is evenly wrapped around the square wood with a square wood. After the wrapping is completed, the fiber cloth wrapped around the square wood is overlapped on the cylindrical core mold, and a shaping spray glue is evenly sprayed on the overlap of the fiber cloth on the cylindrical core mold, so that the fiber cloth has a certain tension when fixed on the surface of the cylindrical core mold, and a certain force is applied to the square wood so that the fiber cloth has a certain tension, and the square wood and the cylindrical core mold are rotated in opposite directions so that the fiber cloth is tightly rolled on the outside of the cylindrical core mold, so as to prepare the composite material inner cylinder wall 1, the composite material outer cylinder wall 2 and the composite material outer wall 5 are all wrapped with fiber cloth by this method, and the first web slats and the second web slats are positioned by fiber wire bundling, and the fiber cloth is wrapped and fixed.

[0080] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A web-type composite foam sandwich socket flange, characterized in that: It comprises a composite material web plate type foam sandwich tube, a composite material web plate type foam sandwich stiffening rib and a composite material flange (8); The composite material web-type foam sandwich tube comprises a composite material inner tube wall (1), a composite material outer tube wall (2), a plurality of first foam strips (3) and a plurality of first composite material webs (4); The composite material inner cylinder wall (1) is in the shape of a hollow cylindrical cylinder body with a circular ring connected at the bottom; the composite material outer cylinder wall (2) is in the shape of a hollow cylindrical cylinder body with a circular ring connected at the bottom; the outer diameter of the composite material outer cylinder wall (2) is greater than the outer diameter of the composite material inner cylinder wall (1); the outer diameter of the circular ring of the composite material inner cylinder wall (1) is the same as the outer diameter of the circular ring of the composite material outer cylinder wall (2); the composite material outer cylinder wall (2) is sleeved on the outside of the composite material inner cylinder wall (1); a plurality of first foam strips (3) are arranged in a circular array between the composite material inner cylinder wall (1) and the composite material outer cylinder wall (2); a first composite material web (4) is arranged between two adjacent first foam strips (3); the first foam strips (3) and the first composite material web (4) are arranged at equal intervals; the first foam strips (3) and the first composite material web (4) are used to connect the composite material inner cylinder wall (1) and the composite material outer cylinder wall (2); The composite material web plate type foam sandwich stiffening rib is arranged on the outside of one end of the composite material web plate type foam sandwich tube, the composite material web plate type foam sandwich stiffening rib comprises a composite material outer wall (5), the composite material outer wall (5) has a Z-shaped cross section, the composite material outer wall (5) is arranged on the outside of the composite material outer tube wall (2), the top end of the composite material outer wall (5) is sleeved on the outside of the composite material outer tube wall (2), the bottom end of the composite material outer wall (5) is located at the top of the composite material outer tube wall (2) circular ring, and is arranged parallel to the composite material outer tube wall (2) circular ring, A plurality of second foam strips (6) are arranged between the composite material outer wall (5) and the composite material outer cylinder wall (2), the plurality of second foam strips (6) are arranged in a circular array, a second composite material web (7) is arranged between two adjacent second foam strips (6), the second composite material webs (7) are arranged at equal intervals, the second foam strips (6) and the second composite material webs (7) are used to fill the gap between the composite material outer wall (5) and the composite material outer cylinder wall (2), and to connect the composite material outer wall (5) and the composite material outer cylinder wall (2); The composite material outer cylinder wall (2) is circumferentially sleeved with a composite material neck band (11), the inner side of the composite material neck band (11) being sleeved on the outer side of the top end of the composite material outer wall (5), the composite material neck band (11) being used to circumferentially reinforce the top end of the composite material outer wall (5) and the composite material outer cylinder wall (2), thereby increasing interlayer bonding and improving the bearing capacity of the composite material web-type foam sandwich stiffening rib; The composite material flange (8) is arranged at the bottom end of the composite material inner cylinder wall (1), the outer diameter of the composite material flange (8) is the same as the outer diameter of the circular ring of the composite material inner cylinder wall (1), the composite material outer wall (5) is sleeved with a metal ring sheet (10), the metal ring sheet (10) is located at the top of the bottom end of the composite material outer wall (5), the bottom of the composite material flange (8) is provided with a plurality of through holes in a circumferential array, the through holes sequentially penetrate the composite material flange (8), the circular ring of the composite material inner cylinder wall (1), the circular ring of the composite material outer cylinder wall (2) and the bottom end of the composite material outer wall (5), the inner wall of the through hole is fixedly mounted with a composite material nut (9), the metal ring sheet (10) is penetrated with a mounting hole equidistant from the through hole opened in the composite material flange (8), the metal ring sheet (10) is used to axially reinforce the bottom end of the composite material outer wall (5) and the circular ring of the composite material outer cylinder wall (2), increase interlayer bonding, and improve the bearing capacity of the composite material web-type foam sandwich stiffening rib.

2. A web-type composite foam sandwich socket flange according to claim 1, characterized in that: The composite material inner cylinder wall (1), the composite material outer cylinder wall (2), the first composite material web (4), the composite material outer wall (5), the second composite material web (7), the composite material flange (8) and the composite material nut (9) are all made of fiber-reinforced resin-based composite materials. The reinforcing material in the fiber-reinforced resin-based composite material is one or more of glass fiber cloth, carbon fiber cloth, basalt fiber cloth and aramid fiber cloth. The resin in the fiber-reinforced resin-based composite material is one or more of epoxy resin, phenolic resin and polyurethane resin.

3. The web-type composite foam sandwich socket flange according to claim 1, characterized in that: The cross section of the first foam strip (3) is an isosceles trapezoid, and the second foam strip (6) is a right-angled triangle plate. The materials of the first foam strip (3) and the second foam strip (6) are one or more of PVC foam, PMI foam, PU foam or PEI foam. The cross section of the first composite material web (4) is a rectangle, and the second composite material web (7) is a right-angled triangle plate.

4. The web-type composite foam sandwich socket flange according to claim 1, characterized in that: The inner diameter of the composite material inner cylinder wall (1) is 50-1000 mm, and the height is 100-500 mm. The thickness of the composite material inner cylinder wall (1) and the composite material outer cylinder wall (2) are the same or different. The thickness of the composite material inner cylinder wall (1) is 2-10 mm, the thickness of the composite material outer cylinder wall (2) is 2-10 mm, the thickness of the first foam strip (3) is 10-100 mm, and the thickness of the first composite material web (4) is 2-10 mm.

5. The web-type composite foam sandwich socket flange according to claim 1, characterized in that: The thickness of the composite material outer wall (5) is 3-10 mm, the thickness of the second foam strip (6) is 10-100 mm, and the thickness of the second composite material web (7) is 3-10 mm.

6. The web-type composite foam sandwich socket flange according to claim 1, characterized in that: The thickness of the composite flange (8) is 5-10 mm, the wall thickness of the composite nut (9) is 5-10 mm, the height dimension of the composite nut (9) is the same as the thickness dimension of the composite flange (8) and the composite inner cylinder wall (1) ring, the composite outer cylinder wall (2) ring, and the bottom end of the composite outer wall (5) superimposed, the thickness of the metal ring sheet (10) is 1-2 mm, and the outer diameter dimension of the metal ring sheet (10) is the same as the outer diameter dimension of the composite flange (8).

7. The web-type composite foam sandwich socket flange according to claim 1, characterized in that: The thickness of the composite material neck band (11) is 1-2 mm, and the height of the composite material neck band (11) is 50-100 mm.

8. A process for preparing a web-type composite foam sandwich socket flange, characterized in that: A web-type composite foam sandwich socket flange applicable to any one of claims 1 to 7, the web-type composite foam sandwich socket flange preparation process is used to prepare a web-type composite foam sandwich socket flange, the web-type composite foam sandwich socket flange preparation process comprises: S1, preparing a plurality of foam flat plates, a plurality of fiber cloths, a plurality of fiber filaments, a cylindrical core mold, a mold release agent, a plastic film, a plastic spray, a metal ring sheet (10) and a plurality of composite material nuts (9); S2. According to the size design requirements, the foam flat plate is cut into a plurality of first foam strips (3) with trapezoidal cross sections and a plurality of second foam strips (6) with right-angled triangular plates; S3, cutting the fiber cloth into a plurality of blocks that are completely consistent with the side shape and size of the first foam strip (3) to obtain a plurality of first composite webs (4), fixing the first composite webs (4) and the first foam strip (3) together through fiber filaments in a one-to-one correspondence to obtain a first web strip, cutting the fiber cloth into a plurality of blocks that are completely consistent with the side shape and size of the second foam strip (6) to obtain a plurality of second composite webs (7), fixing the second composite webs (7) and the second foam strip (6) together through fiber filaments in a one-to-one correspondence to obtain a second web strip; S4. After applying a release agent and a plastic film on the cylindrical core mold, first evenly wrap the mold with fiber cloth, and then turn the bottom end of the wrapped fiber cloth outward along the circumferential direction to form a bottom circular ring, and then use the fiber cloth to reinforce the circular ring obtained after the turning upside down to ensure that the circular ring is uniform and continuous, so as to obtain the composite material inner cylinder wall (1), and then arrange a plurality of first web plate strips tightly along the circumferential direction on the outside of the composite material inner cylinder wall (1), and use fiber filaments to tie and fix the plurality of first web plate strips to the composite material inner cylinder wall (1), and then evenly wrap the fiber cloth on the outside of the fixed plurality of first web plate strips, and then turn the bottom end of the wrapped fiber cloth outward along the circumferential direction to form a bottom circular ring, and then use the fiber cloth to reinforce the circular ring obtained after the turning upside down to ensure that the circular ring is uniform and continuous, so as to obtain the composite material inner cylinder wall (2), and wrap the fiber cloth on the bottom of the bottom circular ring of the composite material outer cylinder wall (2) until it reaches the edge of the bottom circular ring of the composite material outer cylinder wall (1), so as to obtain the composite material flange (8); S5, closely arranging the second web slats along the circumferential direction on the outside of the composite material outer tube wall (2) and located at the top of the bottom ring of the composite material outer tube wall (2), then using fiber filaments to tie and fix a plurality of second web slats on the outside of the composite material outer tube wall (2), using fiber cloth to completely cover the outside of the second web slats, extending the top of the reinforcing material of the composite material outer wall (5) upward along the outside of the composite material outer tube wall (2), and turning the bottom of the reinforcing material of the composite material outer wall (5) outward along the radial direction of the composite material flange (8) to the edge of the bottom ring of the composite material outer tube wall (2), thereby obtaining the composite material outer wall (5); S6, a flange portion is formed by a composite material outer cylinder wall (1) circular ring, a composite material outer cylinder wall (2) circular ring, a composite material outer wall (5) radially outwardly flanged circular ring, and a composite material flange plate (8), the gaps in the reinforcing material constituting the flange portion are artificially expanded, and composite material nuts (9) are pre-embedded in the holes to obtain a flange portion with composite material nuts (9); S7, grinding the contact surface between the metal ring sheet (10) and the flange portion to ensure that the surface is sufficiently rough and then placing it on the upper surface of the flange portion, using fiber cloth to wrap and reinforce the overlapping portion between the composite material outer wall (5) and the composite material outer tube wall (2) to obtain a composite material neck band (11), and finally obtaining a web-type composite foam sandwich socket flange preform; S8, prepare a release cloth, a guide net, a spiral tube, a vacuum bag, an overflow hose and a container filled with resin; S9, on the outside of the web-type composite foam sandwich socket flange preform made in S7, a demoulding cloth, a flow guide net, a glue injection port, a vacuum port, and a spiral tube are sequentially arranged, and finally a vacuum bag is used to package it on a cylindrical core mold to form a sealing system; S10, connect the air extraction port to the vacuum system with a rubber overflow hose, evacuate the sealing system, check the air tightness of the closed system, and after confirming that the air tightness is good, connect the glue injection port to the container containing the resin system with a glue injection hose, and draw the resin into the closed system under negative pressure. The resin evenly infiltrates the fiber cloth through the spiral tube and the guide net and fills the gap between the foam and the fiber cloth, and is cured and formed; S11. Use the push-out method to take the mold out of the solidified molded body, remove the vacuum bag, guide net, demoulding cloth, spiral tube on the molded body in turn, grind the burrs, and finally obtain the web-type composite foam sandwich socket flange.

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