Connection Structure and Connection Method between a Composite Material Heavy-Duty Base and a Composite Material Pressure Resistant Shell

Abstract

The present application discloses a connection structure and a connection method for a composite material heavy-duty base and a composite material pressure-resistant shell. An I-shaped rib is provided between the pressure-resistant shell and the heavy-duty base. The connections of the pressure-resistant shell, the rib, and the heavy-duty base all adopt an adhesive bonding method, which not only improves the connection efficiency but also meets the requirement of non-destructive connection. By setting a fixture to clamp the heavy-duty base and the rib, the anti-peeling ability of the connection node is improved, connection enhancement is achieved, and the heavy-duty base is capable of bearing a large load. In addition to increasing the structural strength of the pressure-resistant shell, the I-shaped rib also functions as a limit and installation for the heavy-duty base, making the connection structure more compact. An I-shaped support block is provided between the fixture and the rib, and the support block can share the ballast force received by the rib web, achieving the purpose of dispersing the load and optimizing the stress.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to a connection structure and a connection method for a composite heavy-duty base and a composite pressure-resistant housing. Background Art

[0002] With the high requirements for hull structure lightweight, vibration reduction, and noise reduction in shipbuilding, the materials used for pressure-resistant housings and heavy-duty bases are gradually changing from traditional metal materials to composite materials. As the main support structure of the equipment platform, the connection design of the heavy-duty base needs to meet relatively strict strength and stiffness requirements. At present, the connection methods between composite materials mainly include mechanical connection and adhesive bonding. Mechanical connection inevitably requires drilling holes in the laminate, which not only reduces the mechanical properties of the laminate but also causes stress concentration. In contrast, adhesive bonding has the effect of preventing crack propagation, better anti-fatigue and vibration reduction performance, but its peel strength is low and it is difficult to transfer large loads. Therefore, the above-mentioned existing technologies are difficult to meet the safe and non-destructive connection requirements between the composite heavy-duty base and the composite pressure-resistant housing, and this is also a key technical problem that urgently needs to be solved in the field of composite material connection technology. Summary of the Invention

[0003] Aiming at the technical problems existing in the prior art, the present application provides a connection structure for a composite heavy-duty base and a composite pressure-resistant housing, so that the connection between the composite heavy-duty base and the composite pressure-resistant housing is safe, non-destructive, and has high peel strength.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A connection structure for a composite heavy-duty base and a composite pressure-resistant housing, wherein ribs are provided between the pressure-resistant housing and the heavy-duty base. The heavy-duty base includes a back plate, a support panel one, and a support panel two. The curvature of the back plate is equal to the curvature of the pressure-resistant housing. The back plate, the support panel one, and the support panel two are connected to form a triangle, and the support panel one is used to support the equipment platform;

[0006] The rib includes an upper wing plate, a lower wing plate, and an intermediate plate. The intermediate plate is connected to the inner surface of the upper wing plate and the outer surface of the lower wing plate to form an I-shaped structure. The curvatures of the upper wing plate and the lower wing plate are equal to the curvature of the pressure-resistant housing. The outer surface of the upper wing plate is adhesively bonded to the inner surface of the pressure-resistant housing, and the inner surface of the lower wing plate is adhesively bonded to the outer surface of the back plate;

[0007] The fixture with a clamping groove can provide a pre-tightening force to the lower wing plate and the back plate by adjusting the spacing of the clamping groove. The upper and lower surfaces of the clamping groove are respectively attached to the surfaces of the lower wing plate and the back plate. An I-shaped support block is arranged between the outer surface of the fixture and the inner surface of the upper wing plate. The upper plate of the support block is adhesively attached to the inner surface of the upper wing plate, and the lower plate is attached to the outer surface of the fixture.

[0008] In one embodiment, the fixture is a threaded clamp and is provided with a threaded hole, and a bolt is equipped in the threaded hole.

[0009] In one embodiment, the width of the lower wing plate is equal to the width of the back plate, and the width of the upper wing plate is greater than the width of the lower wing plate; the upper plate and the lower plate have the same size and are not less than the bottom surface size of the fixture.

[0010] In one embodiment, there are multiple support blocks and fixtures, and the fixtures are evenly spaced on the back plate.

[0011] In one embodiment, the materials of the ribs and the support blocks are carbon fiber reinforced composite materials, and the materials of the fixture and the bolt are metal materials.

[0012] The present invention also provides a connection method for a composite material heavy-duty base and a composite material pressure-resistant housing. Using the above-mentioned connection structure of the composite material heavy-duty base and the composite material pressure-resistant housing, it includes the following steps:

[0013] S1. Grind and clean the surface to be adhesively bonded for surface cleaning;

[0014] S2. Determine the fixed area and adjust the support panel 1 until it is parallel to the horizontal plane;

[0015] S3. Coat the surface to be adhesively bonded with an adhesive and bond and cure it;

[0016] S4. Install the fixture and provide a pre-tightening contact force by adjusting the spacing of the clamping groove;

[0017] In one embodiment, in S1, first use sandpaper to grind the surface to be adhesively bonded, and then use a non-halogenated organic cleaning agent to remove the grease on the surface to be adhesively bonded.

[0018] In one embodiment, the adhesive in S3 is an epoxy adhesive.

[0019] In one embodiment, the bonding and curing in S3 is a medium-temperature secondary bonding process.

[0020] In one embodiment, it further includes S5. Repeat S1 - S4, install multiple heavy-duty bases along the length direction on the left and right sides in the radial direction of the pressure-resistant housing, and place an equipment platform on the heavy-duty bases.

[0021] Compared with the prior art, the beneficial effects in the present application are as follows:

[0022] The present application discloses a connection structure and a connection method for a composite material heavy-duty base and a composite material pressure-resistant housing. An I-shaped rib is provided between the pressure-resistant housing and the heavy-duty base. The connections of the pressure-resistant housing, the rib, and the heavy-duty base all adopt an adhesive bonding method, which not only improves the connection efficiency but also meets the requirement of non-destructive connection; by setting a fixture to clamp the heavy-duty base and the rib, the anti-peeling ability of the connection node is improved, connection enhancement is achieved, and the heavy-duty base is capable of bearing a large load; in addition to increasing the structural strength of the pressure-resistant housing, the I-shaped rib also functions as a limit and installation for the heavy-duty base, making the connection structure more compact; an I-shaped support block is provided between the fixture and the rib, and the support block can share the ballast received by the rib web, achieving the purpose of load dispersion and optimized stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is an assembly schematic diagram of the composite material heavy-duty base and the pressure-resistant housing according to an embodiment of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the composite material rib according to an embodiment of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the composite material heavy-duty base according to an embodiment of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the composite material support block according to an embodiment of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the fixture according to an embodiment of the present invention;

[0029] Figure 6 It is an assembly schematic diagram of the composite material heavy-duty base and the equipment platform according to an embodiment of the present invention.

[0030] Reference numerals: 1, pressure-resistant housing; 2, rib; 21, upper web; 22, lower web; 23, intermediate plate; 3, heavy-duty base; 31, back plate; 32, support panel one; 33, support panel two; 4, support block; 41, upper plate; 42, lower plate; 5, fixture; 51, card slot; 52, bolt; 6, equipment platform. Detailed implementation mode

[0031] The following specific embodiments illustrate the implementation mode of the present invention. Those skilled in this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0032] Please refer to Figures 1 to 6 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limited conditions for the implementation of the present invention. Therefore, they do not have technical substantial significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, terms such as "upper", "lower", "front", "rear", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0033] The embodiment of the present invention provides a connection structure between a composite material heavy-duty base and a composite material pressure-resistant housing. As Figure 1 shown, ribs 2 are provided between the pressure-resistant housing 1 and the heavy-duty base 3.

[0034] As Figure 3 shown, the heavy-duty base 3 includes a back panel 31, a support panel one 32, and a support panel two 33. The curvature of the back panel 31 is equal to the curvature of the pressure-resistant housing 1. The back panel 31, the support panel one 32, and the support panel two 33 are connected to form a triangle, and the support panel one 32 can support the equipment platform 6.

[0035] As Figure 1 、 2 shown, the rib 2 includes an upper wing plate 21, a lower wing plate 22, and an intermediate plate 23. The intermediate plate 23 is connected to the inner surface of the upper wing plate 21 and the outer surface of the lower wing plate 22 to form an I-shaped structure. The curvatures of the upper wing plate 21 and the lower wing plate 22 are equal to the curvature of the pressure-resistant housing 1. The outer surface of the upper wing plate 21 is adhesively bonded to the inner surface of the pressure-resistant housing 1, and the inner surface of the lower wing plate 22 is adhesively bonded to the outer surface of the back panel 31. To enhance the structural strength of the rib 2, the width of the lower wing plate 22 is equal to the width of the back panel 31, and the width of the upper wing plate 21 is greater than the width of the lower wing plate 22. In one implementation, the width of the upper wing plate 21 is twice the width of the lower wing plate 22.

[0036] As Figure 1, 5 As shown in FIGS. 6, the fixture 5 with the card slot 51 can provide a pre-tightening force to the lower wing plate 22 and the back plate 31 by adjusting the spacing of the card slot 51. The upper and lower surfaces of the card slot 51 are respectively in contact with the surfaces of the lower wing plate 22 and the back plate 31. In one embodiment, the fixture 5 is a threaded clamp and is provided with a threaded hole, and a bolt 52 is equipped in the threaded hole. The pre-tightening contact force can be provided to the lower wing plate 22 and the back plate 31 by adjusting the tightness of the bolt 12.

[0037] As Figure 1 , 4 As shown in FIGS. 6, an I-shaped support block 4 is provided between the bottom surface of the fixture 5 and the inner surface of the upper wing plate 21. The upper plate 42 of the support block 4 is adhesively bonded to the inner surface of the upper wing plate 21, and the lower plate 42 is in contact with the bottom surface of the fixture 5. The support block 4 can share the ballast force received by the rib wing plate, realizing the optimization of the force by dispersing the load. The upper plate 42 and the lower plate 42 have the same size and are not smaller than the bottom surface size of the fixture 5. In one embodiment, the upper plate 42, the lower plate 42 and the bottom surface of the fixture 5 have the same size to improve the bearing pressure of the support block. There are multiple support blocks 4 and fixtures 5, and the fixtures 5 are evenly spaced on the back plate 31. Preferably, four fixtures 5 are evenly spaced on the back plate 31, two of which are in the triangular area, and support blocks are correspondingly provided for the fixtures 5 in the triangular area.

[0038] In one embodiment, in order to make the connection structure lighter, the pressure-resistant housing 1, the ribs 2, the heavy-duty base 3 and the support block 4 are made of carbon fiber reinforced composite materials, and the fixture 5 and the bolts are made of titanium alloy.

[0039] As Figure 6 shown, a caliper or the like is used to determine the connection and fixing area. Epoxy adhesive is coated on the connection parts of the inner surface of the pressure-resistant housing 1, the outer surface of the upper wing plate 21, the inner surface of the lower wing plate 22, the outer surface of the back plate 31, the inner surface of the upper wing plate 21 and the outer surface of the upper plate 41 to achieve adhesive bonding. The support panel 32 is repeatedly adjusted with a level to be parallel to the horizontal plane. A plurality of heavy-duty bases 3 are evenly spaced along the length direction on the left and right sides in the radial direction of the pressure-resistant housing 1, and an equipment platform 6 is placed on the support panel 32 of the heavy-duty base 3.

[0040] The connection method of the above-mentioned connection structure of the composite material heavy-duty base and the composite material pressure-resistant housing includes the following steps:

[0041] S1. Sand and clean the surfaces to be adhesively bonded for surface cleaning: Use 250-mesh sandpaper to sand and clean the surfaces to be adhesively bonded of the pressure-resistant housing 1, the ribs 2, the heavy-duty base 3 and the support block 4, and then use a non-halogenated organic cleaning agent to remove the grease on the surfaces to be adhesively bonded.

[0042] S2. Determine the fixed area and adjust the first support panel 32 until it is parallel to the horizontal plane: After determining the connection and fixed area using a caliper or the like, repeatedly adjust with a level to make the first support panel 32 of the heavy-duty base 3 parallel to the horizontal plane.

[0043] S3. Coat the bonding surfaces with an adhesive and bond and cure: Paste an epoxy resin film with a thickness of 0.16 mm on the bonding surfaces of the pressure-resistant housing 1 and the upper wing plate 21, the lower wing plate 22 and the back plate 31, the upper plate 41 and the upper wing plate 21, and the lower plate 42 and the bottom surface of the fixture 5. Fix with a tooling fixture and ensure that the bonding surfaces are closely fitted. Then, adopt a medium-temperature secondary bonding process for bonding and curing. In one implementation, place the parts to be bonded in an incubator, first cure at a constant temperature of 80 degrees for 1 hour, then cure at 120 degrees for 2 hours, and finally place at room temperature for cooling. After standing for at least 48 hours, the tooling fixture can be removed.

[0044] S4. Install the fixture 5 and provide a pre-tightening force to the lower wing plate 22 and the back plate 31 by adjusting the spacing of the card slots 51: Fit the upper and lower surfaces of the fixture 5 to the outer surfaces of the lower wing plate 22 and the back plate 31 respectively, and fit the lower plate 42 of the support block to the bottom surface of the fixture 5. Provide a pre-tightening contact force of 100,000 N by adjusting the distance of the card slots.

[0045] S5. Repeat S1 - S4, install multiple heavy-duty bases 3 along the length direction on the left and right sides in the radial direction of the pressure-resistant housing 1, and place the equipment platform 6 on the heavy-duty bases 3.

[0046] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A connection structure between a composite material heavy-duty base and a composite material pressure-resistant housing. A rib (2) is provided between the pressure-resistant housing (1) and the heavy-duty base (3). It is characterized in that: The heavy-duty base (3) includes a back plate (31), a first support panel (32) and a second support panel (33). The curvature of the back plate (31) is equal to the curvature of the pressure-resistant housing (1). The back plate (31), the first support panel (32) and the second support panel (33) are connected to each other to form a triangle. The first support panel (32) is used to support the equipment platform; The rib (2) includes an upper wing plate (21), a lower wing plate (22) and an intermediate plate (23). The intermediate plate (23) is connected to the inner surface of the upper wing plate (21) and the outer surface of the lower wing plate (22) to form an I-shaped cross-section. The curvatures of the upper wing plate (21) and the lower wing plate (22) are equal to the curvature of the pressure-resistant housing (1). The outer surface of the upper wing plate (21) is adhesively bonded to the inner surface of the pressure-resistant housing (1), and the inner surface of the lower wing plate (22) is adhesively bonded to the outer surface of the back plate (31); A fixture (5) having a card slot (51) can provide a pre-tightening force to the lower wing plate (22) and the back plate (31) by adjusting the spacing of the card slot (51). The upper and lower surfaces of the card slot (51) are respectively in contact with the surfaces of the lower wing plate (22) and the back plate (31). An I-shaped support block (4) is provided between the outer surface of the fixture (5) and the inner surface of the upper wing plate (21). The upper plate (41) of the support block (4) is adhesively bonded to the inner surface of the upper wing plate (21), and the lower plate (42) is in contact with the outer surface of the fixture (5).

2. The connecting structure of the composite material heavy-load base and the composite material pressure-resistant housing according to claim 1, characterized in that The fixture (5) is a threaded clamp and is provided with a threaded hole, and a bolt (52) is provided in the threaded hole.

3. The connecting structure between the composite material heavy-duty base and the composite material pressure-resistant housing according to claim 1, characterized in that, The width of the lower wing plate (22) is equal to the width of the back plate (31), and the width of the upper wing plate (21) is greater than the width of the lower wing plate (22); the upper plate (41) and the lower plate (42) have the same size and are not less than the bottom surface size of the fixture (5).

4. The connection structure between the composite material heavy-duty base and the composite material pressure-resistant housing according to claim 1, characterized in that, There are multiple support blocks (4) and fixtures (5), and the fixtures (5) are evenly spaced on the back plate (31).

5. The connection structure between the composite material heavy-load base and the composite material pressure-resistant housing according to claim 2, characterized in that, The materials of the rib (2) and the support block (4) are carbon fiber reinforced composite materials, and the materials of the fixture (5) and the bolt (52) are metal materials.

6. A connection method for a composite heavy-load base and a composite pressure-resistant housing, using the connection structure of the composite heavy-load base and the composite pressure-resistant housing as described in any one of claims 1-5, characterized in that, It includes the following steps: S1. Grind and clean the surface to be adhesively bonded for surface cleaning; S2. Determine the fixing area and adjust the first support panel (32) until it is parallel to the horizontal plane; S3. Coat the surface to be adhesively bonded with an adhesive and cure by adhesive bonding; S4. Install the fixture (5) and provide a pre-tightening contact force by adjusting the spacing of the card slot (51).

7. A connection method for a composite material heavy-duty base and a composite material pressure-resistant housing according to claim 6, characterized in that: In S1, first use sandpaper to grind the surface to be adhesively bonded, and then use a non-halogenated organic cleaning agent to remove the grease on the surface to be adhesively bonded.

8. A connection method for a composite material heavy-duty base and a composite material pressure-resistant housing according to claim 6, characterized in that: The adhesive in S3 is an epoxy adhesive.

9. A connection method for a composite heavy-duty base and a composite pressure-resistant housing according to claim 6, characterized in that: The adhesive bonding and curing in S3 is a medium-temperature secondary adhesive bonding process.

10. A connection method for a composite heavy-duty base and a composite pressure-resistant housing according to claim 6, characterized in that: It further includes S5. Repeat S1 - S4. Install a plurality of heavy-duty bases (3) along the length direction on the left and right sides in the radial direction of the pressure-resistant housing (1), and place the equipment platform (6) on the heavy-duty bases (3).

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