Composite fastening structure of composite tank

Abstract

The utility model discloses a composite material fastening structure of a composite material tank body, which comprises a composite material upper half fastening strip and a composite material lower half fastening strip which are oppositely arranged, and the inner sides of the composite material upper half fastening strip and the composite material lower half fastening strip are respectively connected with the composite material tank body in a bonding way. A metal support is arranged below the composite material lower half fastening strip, and an upper half fixing hole and a lower half fixing hole are formed in the two sides of the composite material upper half fastening strip and the two sides of the composite material lower half fastening strip respectively. According to the composite material upper half fastening strip and the composite material lower half fastening strip provided by the utility model, the composite material tank body can be restrained through bonding and proper interference contact, so that the friction between the fastening strips and the contact surface of the composite material tank body is avoided, and the extrusion of the fastening strips on the composite material tank body is reduced; and the damage risk of the composite material tank body is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of composite fastening structure of composite tank. BACKGROUND

[0002] Resin-based carbon fiber composite material has high specific strength, high specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, good dimensional stability and other superior performance, and is a high-performance structural material widely used in aviation, aerospace, transportation and other fields. Large-size tank made of composite material has good performance such as light weight, high strength, fatigue resistance and stability, and is applied to the storage and transportation of various liquids. In order to ensure the stability of the composite tank, the tank needs to be fixed with other structures.

[0003] Currently, a metal fastening strip is usually used to tighten the tank to achieve the fixation of the composite tank. However, it is difficult to form a firm bond between the metal fastening strip and the composite tank, so the amount of interference contact needs to be increased to enhance the restraint force on the tank. This method can easily cause the tank to be damaged due to extrusion deformation and mutual friction during long-term use. In addition, the metal fastening strip has poor corrosion resistance and can easily rust and fail after long-term use. At the same time, the metal fastening strip can also exhibit a creep phenomenon, further affecting its fixation effect. In addition, the metal fastening strip is heavy and difficult to install. SUMMARY

[0004] The main purpose of the utility model is to provide a composite fastening structure of composite tank to solve the problems raised in the background technology.

[0005] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0006] A composite fastening structure of composite tank, comprising two oppositely arranged composite upper half fastening strips and composite lower half fastening strips, the inner sides of the composite upper half fastening strips and the composite lower half fastening strips are respectively bonded and connected with the composite tank, a metal bracket is arranged below the composite lower half fastening strip, and upper half fixing holes and lower half fixing holes are respectively arranged on the two sides of the composite upper half fastening strips and the composite lower half fastening strips.

[0007] Preferably, the composite upper half fastening strip is divided into an upper half contact portion and an upper half fixed portion, the composite lower half fastening strip is divided into a lower half contact portion and a lower half fixed portion, and the upper half fixing holes and the lower half fixing holes are respectively arranged on the upper half fixed portion and the lower half fixed portion.

[0008] Preferably, the upper half contact portion and the lower half contact portion are both semi-circular ring structures, the upper half fixed portion is arranged at both ends of the upper half contact portion, and the lower half fixed portion is arranged at both ends of the lower half contact portion.

[0009] Preferably, two first through holes are arranged on the lower half contact part at intervals, and a first bolt is inserted into the first through holes from inside to outside.

[0010] Preferably, the metal support comprises a metal contact part and a metal fixing part, and the second through hole is arranged on the metal contact part.

[0011] Preferably, metal fixing holes matched with the upper half fixing hole and the lower half fixing hole are arranged on both sides of the metal fixing part.

[0012] Preferably, a gasket is arranged between the upper half fixing part and the lower half fixing part, and a second bolt is arranged in the upper half fixing hole, the lower half fixing hole and the metal fixing hole.

[0013] Preferably, a groove is arranged on the inner side of the lower half contact part at a position corresponding to the first through hole.

[0014] Preferably, a convex ring is arranged on the metal support outside the second through hole, and the outer side of the convex ring is a plane.

[0015] The beneficial technical effects of the utility model are as follows:

[0016] 1. The composite material upper half fastening strip and the composite material lower half fastening strip can provide constraint on the composite material tank body through adhesive bonding and appropriate interference contact, avoid friction on the contact surface between the fastening strip and the composite material tank body, reduce extrusion of the fastening strip on the composite material tank body, and reduce the risk of damage to the composite material tank body. In addition, the composite material upper half fastening strip and the composite material lower half fastening strip have good corrosion resistance and good creep resistance, and can maintain constraint on the composite material tank body for a long time.

[0017] 2. The metal support is arranged below the composite material lower half fastening strip, the composite material tank body is fixed on other structures through the metal support, the fastening strip of the composite material is used as a medium to realize stable connection between the composite material tank body and other structures, the fixing effect on other structures can be ensured while the fastening effect is ensured, the composite material tank body can bear greater pressure, and the load bearing capacity is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an explosion structure schematic view of the fastening structure of the embodiment of the utility model;

[0019] Figure 2 It is an overall structure schematic view of the fastening structure of the embodiment of the utility model;

[0020] Figure 3The embodiment of the utility model discloses a fastening structure and a composite tank body mounting structure schematic view.

[0021] In the drawing: 1, composite upper half fastening strip; 101, upper half contact part; 102, upper half fixed part; 2, composite lower half fastening strip; 201, lower half contact part; 202, lower half fixed part; 3, metal support; 301, metal contact part; 302, metal fixed part; 4, upper half fixed hole; 5, lower half fixed hole; 6, first through hole; 7, first bolt; 8, second through hole; 9, metal fixed hole; 10, gasket; 11, second bolt; 12, groove; 13, convex ring. DETAILED DESCRIPTION

[0022] In order to make the technical scheme of the utility model clearer and more explicit for those skilled in the art, the utility model will be described in further detail below in conjunction with the embodiments and drawings, but the embodiment of the utility model is not limited thereto.

[0023] As Figures 1-3 shown, the composite fastening structure of the composite tank body provided by the embodiment comprises two oppositely arranged composite upper half fastening strips 1 and composite lower half fastening strips 2, the inner sides of the composite upper half fastening strips 1 and the composite lower half fastening strips 2 are respectively adhesively connected with the composite tank body, a metal support 3 is arranged below the composite lower half fastening strips 2, and upper half fixed holes 4 and lower half fixed holes 5 are respectively arranged on the two sides of the composite upper half fastening strips 1 and the composite lower half fastening strips 2.

[0024] The composite upper half fastening strips 1 and the composite lower half fastening strips 2 can provide restraint to the composite tank body through adhesive combination and appropriate interference contact, avoid friction on the contact surface between the fastening strips and the composite tank body, reduce extrusion of the fastening strips on the composite tank body, and reduce the risk of damage to the composite tank body.

[0025] In the manufacturing process, the composite upper half fastening strips 1, the composite lower half fastening strips 2 and the composite tank body are respectively formed, which can reduce the forming difficulty and accelerate the manufacturing speed.

[0026] The metal parts used are less, which effectively reduces the overall weight and facilitates installation and operation.

[0027] In the embodiment, as Figure 1 shown, the composite upper half fastening strips 1 are divided into upper half contact parts 101 and upper half fixed parts 102, the composite lower half fastening strips 2 are divided into lower half contact parts 201 and lower half fixed parts 202, and the upper half fixed holes 4 and the lower half fixed holes 5 are respectively arranged on the upper half fixed parts 102 and the lower half fixed parts 202.

[0028] In the embodiment, as Figure 1As shown, the upper half contact part 101 and the lower half contact part 201 are both semi-circular ring structures, the upper half fixed part 102 is arranged at both ends of the upper half contact part 101, and the lower half fixed part 202 is arranged at both ends of the lower half contact part 201, which better adapts to the curved surface shape of the composite material tank body, provides uniform pressure distribution, and avoids local stress concentration.

[0029] In the embodiment, as shown in the figure, Figure 1 As shown, two first through holes 6 are arranged on the lower half contact part 201, and a first bolt 7 is inserted into the first through hole 6 from the inside to the outside, a second through hole 8 is arranged on the metal support 3 to allow the first bolt 7 to pass through, and the fixed connection of the composite material lower half fastening strip 2 and the metal support 3 is ensured.

[0030] In the embodiment, as shown in the figure, Figure 1 The metal support 3 includes a metal contact part 301 and a metal fixed part 302, and the second through hole 8 is arranged on the metal contact part 301 to facilitate connection and fixation with the composite material lower half fastening strip 2.

[0031] In the embodiment, as shown in the figure, Figure 1 As shown, metal fixed holes 9 are arranged on both sides of the metal fixed part 302 to cooperate with the upper half fixed hole 4 and the lower half fixed hole 5, a gasket 10 is arranged between the upper half fixed part 102 and the lower half fixed part 202, the gasket 10 adjusts the interference contact amount of the composite material upper half fastening strip 1, the composite material lower half fastening strip 2 and the composite material tank body, and a second bolt 11 is arranged in the upper half fixed hole 4, the lower half fixed hole 5 and the metal fixed hole 9 to fix the composite material upper half fastening strip 1, the composite material lower half fastening strip 2 and the metal support 3 together.

[0032] In the embodiment, as shown in the figure, Figure 1 As shown, a groove 12 is arranged on the inside of the lower half contact part 201 at the corresponding position of the first through hole 6, when the first bolt 7 is inserted, the head part will be placed in the groove 12, and the adhesive fixation of the composite material lower half fastening strip 2 and the composite material tank body will not be affected.

[0033] In the embodiment, as shown in the figure, Figure 1 As shown, a convex ring 13 is arranged on the metal support 3 outside the second through hole 8, the outside of the convex ring 13 is a plane, and the first bolt 7 is fixed by using a nut.

[0034] In summary, in the present embodiment, the composite upper half fastening strip 1 and the composite lower half fastening strip 2 can provide restraint to the composite tank body through adhesive bonding and appropriate interference contact, avoid friction between the fastening strip and the contact surface of the composite tank body, reduce the extrusion of the fastening strip to the composite tank body, and reduce the risk of damage to the composite tank body. Moreover, the composite upper half fastening strip 1 and the composite lower half fastening strip 2 have good corrosion resistance and good creep resistance, and can maintain the restraint to the composite tank body for a long time. The metal bracket 3 is arranged below the composite lower half fastening strip 2, the composite tank body is fixed to other structures through the metal bracket 3, and stable connection between the composite tank body and other structures is realized through the composite fastening strip as a medium, so that the fastening effect of the composite tank body and the fixing effect to other structures are ensured, and the composite tank body can bear greater pressure and the load bearing capacity is enhanced.

[0035] The above is only further embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and concept of the present application within the disclosed range, which belongs to the protection scope of the present application.

Claims

1. A composite fastening structure of a composite tank body, characterized by: The utility model provides a composite material upper half fastening strip (1) and a composite material lower half fastening strip (2) are arranged oppositely, and the inner side of composite material upper half fastening strip (1) and composite material lower half fastening strip (2) is bonded with composite material tank body respectively, the lower side of composite material lower half fastening strip (2) is provided with metal support (3), and the both sides of composite material upper half fastening strip (1) and composite material lower half fastening strip (2) are provided with upper half fixed hole (4) and lower half fixed hole (5) respectively.

2. The composite fastening structure of a composite tank according to claim 1, wherein: The utility model discloses a composite material upper half fastening strip (1) is divided into upper half contact part (101) and upper half fixed part (102), and the composite material lower half fastening strip (2) is divided into lower half contact part (201) and lower half fixed part (202), and upper half fixed hole (4) and lower half fixed hole (5) are arranged on upper half fixed part (102) and lower half fixed part (202) respectively.

3. The composite fastening structure of a composite tank according to claim 2, wherein: The utility model discloses a composite material upper half fastening strip (1) is divided into upper half contact part (101) and upper half fixed part (102), and the composite material lower half fastening strip (2) is divided into lower half contact part (201) and lower half fixed part (202), and upper half fixed hole (4) and lower half fixed hole (5) are arranged on upper half fixed part (102) and lower half fixed part (202) respectively.

4. The composite fastening structure of a composite tank according to claim 2, wherein: The utility model discloses a composite material upper half fastening strip (1) is divided into upper half contact part (101) and upper half fixed part (102), and the composite material lower half fastening strip (2) is divided into lower half contact part (201) and lower half fixed part (202), and upper half fixed hole (4) and lower half fixed hole (5) are arranged on upper half fixed part (102) and lower half fixed part (202) respectively.

5. The composite fastening structure of a composite tank according to claim 4, wherein: The utility model discloses a composite material upper half fastening strip (1) is divided into upper half contact part (101) and upper half fixed part (102), and the composite material lower half fastening strip (2) is divided into lower half contact part (201) and lower half fixed part (202), and upper half fixed hole (4) and lower half fixed hole (5) are arranged on upper half fixed part (102) and lower half fixed part (202) respectively.

6. The composite fastening structure of a composite tank according to claim 5, wherein: The utility model discloses a composite material upper half fastening strip (1) is divided into upper half contact part (101) and upper half fixed part (102), and the composite material lower half fastening strip (2) is divided into lower half contact part (201) and lower half fixed part (202), and upper half fixed hole (4) and lower half fixed hole (5) are arranged on upper half fixed part (102) and lower half fixed part (202) respectively.

7. The composite fastening structure of a composite tank according to claim 6, wherein: The utility model discloses a composite material upper half fastening strip (1) is divided into upper half contact part (101) and upper half fixed part (102), and the composite material lower half fastening strip (2) is divided into lower half contact part (201) and lower half fixed part (202), and upper half fixed hole (4) and lower half fixed hole (5) are arranged on upper half fixed part (102) and lower half fixed part (202) respectively.

8. The composite fastening structure of a composite tank according to claim 4, wherein: The utility model discloses a composite material upper half fastening strip (1) is divided into upper half contact part (101) and upper half fixed part (102), and the composite material lower half fastening strip (2) is divided into lower half contact part (201) and lower half fixed part (202), and upper half fixed hole (4) and lower half fixed hole (5) are arranged on upper half fixed part (102) and lower half fixed part (202) respectively.

9. The composite fastening structure of a composite tank according to claim 4, wherein: ​

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