Composite material assembled cover plate structure and preparation method thereof

Abstract

The invention belongs to the technical field of composite material manufacturing, and particularly relates to a composite material assembly cover plate structure and a preparation method thereof.The cover plate structure comprises a cover plate assembly, the cover plate assembly is of a multi-layer structure, and the middle of the cover plate assembly is filled with a foam carbon fiber reinforcing composite layer and an edge reinforcing structure; the edge of the cover plate assembly is provided with a first connecting part used for being connected with the inner edge of a wellhead. The cover plate assembly comprises a lower skin, an edge reinforcing structure is fixedly connected to the edge of the lower skin, and a foam carbon fiber reinforcing composite layer is fixedly connected to the middle of the lower skin. And the upper skin is fixedly connected to the foam carbon fiber reinforced composite layer and the edge reinforcing structure. Compared with a traditional cover plate, the foam carbon fiber reinforced composite layer is adopted to replace a traditional solid structure, the foam carbon fiber reinforced composite layer is made of foam and carbon fibers, light weight is achieved while the strength is guaranteed, and light weight of the cover plate can also be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of composite material manufacturing, and in particular relates to a composite material assembled cover plate structure and a preparation method thereof. Background Art

[0002] In the fields of construction, municipal engineering, communications, etc., cover plates are widely used to cover various holes, grooves, etc. to provide protection, safety and aesthetics. Traditional cover plates are usually made of metal, concrete and other materials, which have problems such as heavy weight and easy corrosion. With the continuous development of material science, when facing large-span grooves or wellheads, the lightweight of cover plates is particularly important. Therefore, in response to the above problems, we propose a composite material assembly cover plate structure and its preparation method. Summary of the invention

[0003] The object of the present invention is to provide a composite material assembled cover plate structure and a preparation method thereof to solve the above problems.

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

[0005] A composite material assembled cover plate structure, comprising:

[0006] A cover plate assembly, wherein the cover plate assembly is a multi-layer structure, and the middle part of the cover plate assembly is filled with a foam carbon fiber reinforced composite layer and an edge reinforcement structure;

[0007] The edge of the cover plate assembly is provided with a connecting portion 1 for connecting with the inner edge of the wellhead;

[0008] The cover plate assembly comprises:

[0009] A lower skin, wherein the edge reinforcement structure is fixedly connected to the edge of the lower skin, and the foam carbon fiber reinforced composite layer is fixedly connected to the middle part of the lower skin;

[0010] The upper skin is fixedly connected to the foam carbon fiber reinforced composite layer and the edge reinforcement structure.

[0011] Optionally, the foam carbon fiber reinforced composite layer includes foam and a plurality of reinforcement parts, the bottom of the foam is fixedly connected to the lower skin, the top of the foam is fixedly connected to the upper skin, and the reinforcement parts are embedded in the foam.

[0012] Optionally, the reinforcement portion includes a plurality of carbon fiber reinforcement ribs, and the plurality of carbon fiber reinforcement ribs are surrounded and embedded in the foam.

[0013] Optionally, the edge reinforcement structure includes a plurality of metal embedded parts, the bottom of the metal embedded parts is fixedly connected to the lower skin, the top of the metal embedded parts is fixedly connected to the upper skin, and the plurality of metal embedded parts are distributed along the edge of the lower skin.

[0014] Optionally, the connection portion 1 includes a plurality of fixed supports, which are fixedly connected to the bottom of the cover plate assembly, and the plurality of fixed supports are distributed along the bottom edge of the cover plate assembly, and the edge of the cover plate assembly is fixedly connected with a pin 1 for pinning with the inner edge of the wellhead.

[0015] Optionally, the cover plate assembly consists of a cover plate 2 located in the middle and a plurality of cover plates 1 arranged around the cover plate 2, and the cover plate 2 is detachably connected to the cover plate 1 via a connecting portion 2.

[0016] Optionally, the second connecting portion includes a second latch pin, one end of which is fixed to an edge of the second cover plate, and the other end of which is pin-connected to an edge of the first cover plate.

[0017] A method for preparing a composite material assembled cover plate structure, used for preparing the above-mentioned composite material assembled cover plate structure, comprises the following steps:

[0018] Use carbon fiber to make the lower skin and lay it up;

[0019] Installing the edge reinforcement structure and the foam carbon fiber reinforced composite layer to the lower skin;

[0020] Laying the upper skin on the edge reinforcement structure and the surface of the foam carbon fiber reinforced composite layer, putting it into a vacuum bag and pressurizing it;

[0021] The vacuum bag containing the cover plate assembly is pushed into a vacuum tank for heating and curing.

[0022] Optionally, the preparation of the foam carbon fiber reinforced composite layer comprises the following steps:

[0023] Take the cut foam, lay a number of the carbon fiber reinforcement ribs on the foam surface, put the foam and the carbon fiber reinforcement ribs into a vacuum bag and push it into a vacuum tank for heating and curing.

[0024] Compared with the prior art, the present invention has the following advantages and technical effects:

[0025] Compared with traditional cover plates, the present invention adopts a foam carbon fiber reinforced composite layer to replace the traditional solid structure. The foam carbon fiber reinforced composite layer is made of foam and carbon fiber, which can achieve lightweight while ensuring strength. At the same time, by setting the upper skin and the lower skin, carbon fiber is selected as the material of the upper skin and the lower skin, which can also achieve lightweight of the cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a structural schematic diagram of a cover plate of the present invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of a cover plate of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of a latch of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of the second cover plate of the present invention;

[0032] Figure 6 This is a schematic diagram of the internal structure of the cover plate 2 of the present invention;

[0033] Figure 7 It is a schematic diagram of the position of the fixed support of the present invention;

[0034] Figure 8 This is a schematic diagram of the fixed support structure of the present invention;

[0035] Fig. 9 This is a schematic diagram of the structure of the second latch of the present invention;

[0036] Among them, 1. Cover plate one; 2. Cover plate two; 3. Pin one; 4. Pin two; 5. Fixed support; 6. Metal embedded parts; 7. Foam; 8. Carbon fiber reinforcement ribs. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Reference Figures 1 to 9 The present invention discloses a composite material assembled cover plate structure, comprising:

[0040] The cover plate assembly is a multi-layer structure, and the middle part of the cover plate assembly is filled with a foam carbon fiber reinforced composite layer and an edge reinforcement structure;

[0041] The edge of the cover plate assembly is provided with a connection portion 1 for connecting with the inner edge of the wellhead;

[0042] The cover assembly includes:

[0043] The lower skin, the edge reinforcement structure is fixedly connected to the edge of the lower skin, and the foam carbon fiber reinforced composite layer is fixedly connected to the middle part of the lower skin;

[0044] The upper skin is fixed to the foam carbon fiber reinforced composite layer and the edge reinforcement structure.

[0045] As an optional implementation, the foam carbon fiber reinforced composite layer includes foam 7 and a plurality of reinforcement parts, the bottom of the foam 7 is fixedly connected to the lower skin, the top of the foam 7 is fixedly connected to the upper skin, and the reinforcement parts are embedded in the foam 7.

[0046] Compared with traditional cover plates, the present invention adopts a foam carbon fiber reinforced composite layer to replace the traditional solid structure. The foam carbon fiber reinforced composite layer is made of foam and carbon fiber, which can achieve lightweight while ensuring strength. At the same time, by setting the upper skin and the lower skin, carbon fiber is selected as the material of the upper skin and the lower skin, which can also achieve lightweight of the cover plate.

[0047] The foam 7 mainly serves to fill the inner space of the cover plate to reduce the weight of the product.

[0048] As an optional implementation, the reinforcement portion includes a plurality of carbon fiber reinforcement ribs 8 , and the plurality of carbon fiber reinforcement ribs 8 are surrounded and embedded in the foam 7 .

[0049] The carbon fiber reinforcement ribs 8 mainly play a role of local reinforcement.

[0050] As an optional embodiment, the edge reinforcement structure includes a plurality of metal embedded parts 6, the bottom of the metal embedded parts 6 is fixedly connected to the lower skin, the top of the metal embedded parts 6 is fixedly connected to the upper skin, and the plurality of metal embedded parts 6 are distributed along the edge of the lower skin.

[0051] As an optional embodiment, the connection part 1 includes a plurality of fixed supports 5, which are fixedly connected to the bottom of the cover plate assembly. The plurality of fixed supports 5 are distributed along the bottom edge of the cover plate assembly, and the edge of the cover plate assembly is fixedly connected with a pin 3 for pinning with the inner edge of the wellhead.

[0052] The cover plate assembly and the fixed support 5 can be fixed by using a pin, the fixed support 5 can be welded to the edge of the wellhead, the pin 3 is a horizontal pin, and the pin 3 can be connected to the pin hole at the edge of the wellhead, so that the covering work of the wellhead can be completed.

[0053] As an optional embodiment, the cover plate assembly is composed of a cover plate 2 located in the middle and a plurality of cover plates 1 arranged around the cover plate 2 2 , and the cover plate 2 2 and the cover plate 1 1 are detachably connected via a connecting portion 2.

[0054] As an optional implementation, the second connecting portion includes a second latch pin 4, one end of the second latch pin 4 is fixed to the edge of the second cover plate 2, and the other end of the second latch pin 4 is pin-connected to the edge of the first cover plate 1.

[0055] Furthermore, the device is composed of a cover plate 2 2 and four cover plates 1, the cover plate 1 1 and the cover plate 2 2 have the same layer structure, the four cover plates 1 are arranged around the cover plate 2 2 at equal intervals, and the main function of the cover plate 2 2 is to connect the four evenly distributed cover plates 1 to form a whole.

[0056] Four composite material cover plates 1 and one composite material cover plate 2 are connected by means of latches to form a whole, one end of the latch 2 4 is connected to the cover plate 1 1 , and the other end is connected to the cover plate 2 2 .

[0057] Since the structure is convenient for disassembly, when the latch 2 4 is used for fixed connection, a certain cover plate 1 or cover plate 2 2 can be conveniently replaced after it is worn out and fails, thereby further extending the service life of the composite material cover plate as a whole.

[0058] The working principle of the present invention is:

[0059] A composite material assembled cover plate structure includes a cover plate assembly, a fixed support 5, a latch 1 3, and a latch 2 4. The cover plate assembly is composed of a wear-resistant rubber pad, a carbon fiber skin, a carbon fiber reinforcement 8, a foam 7, and a metal embedded part 6 in sequence. The wear-resistant rubber pad adopts an EPDM rubber pad and is bonded to the upper surface of the cover plate assembly with an adhesive. The foam 7 adopts PMI foam and is machined by a CNC machine tool. A C-shaped depression is machined around the foam 7, and then the C-shaped depression is filled with a carbon fiber reinforcement 8. After the filling is completed, it is sent to a vacuum tank for heating and curing, thereby obtaining a combination of the carbon fiber reinforcement 8 and the foam 7. The carbon fiber skin is laid flat on a flat tooling and then the combination of the carbon fiber reinforcement 8 and the foam 7 is placed in a suitable position, and then the skin on the upper surface of the cover plate assembly is paved. After the paving is completed, the cover plate is sent to a vacuum tank or an oven for overall curing, thereby obtaining a cover plate.

[0060] The fixed support 5 is made of Q345 material and is processed by a CNC machine tool. The first latch 3 and the second latch 4 are integrally processed from 45 steel and are subjected to quenching and tempering heat treatment after processing.

[0061] A method for preparing a composite material assembled cover plate structure, used for preparing the above-mentioned composite material assembled cover plate structure, comprises the following steps:

[0062] Use carbon fiber to make the lower skin and lay it up;

[0063] Install edge reinforcement structures and foam carbon fiber reinforced composite layers to the lower skin;

[0064] Lay the upper skin on the edge reinforcement structure and the surface of the foam carbon fiber reinforced composite layer, then put it into a vacuum bag and pressurize it;

[0065] Push the vacuum bag containing the cover assembly into the vacuum tank for heating and curing.

[0066] As an optional embodiment, the preparation of the foam carbon fiber reinforced composite layer includes the following steps:

[0067] Take the cut foam 7, lay a number of carbon fiber reinforcement ribs 8 on the surface of the foam 7, put the foam 7 and the number of carbon fiber reinforcement ribs 8 into a vacuum bag and push it into a vacuum tank for heating and curing.

[0068] The design and preparation process of this device are as follows:

[0069] The material, size, distribution and connection form of the tooling are determined based on the structure's shape, overload, safety factor, etc.

[0070] The metal embedded parts 6 and the foam 7 are both made of plates through CNC machining. More optionally, under the premise of ensuring that the design requirements are met, they are made into standard specifications and sizes to reduce the processing volume, processing cycle and manufacturing difficulty.

[0071] Furthermore, the middle reinforcement structure is composed of a number of carbon fiber reinforcement ribs 8, which are laid on the surface of the processed foam 7. The carbon fiber reinforcement ribs 8 are U-shaped structures. After being heated and cured in a vacuum tank, the carbon fiber reinforcement ribs 8 and the foam 7 form a foam carbon fiber reinforced composite layer.

[0072] When preparing the cover assembly, first use carbon fiber to lay the lower skin, then embed the metal embedded parts 6 and the cured foam carbon fiber reinforced composite layer, and then lay the upper skin of the cover assembly, and then pressurize it with a vacuum bag and push it into a vacuum tank for heating and curing.

[0073] The beneficial effects and advantages of the present invention are:

[0074] (1) The composite material assembled cover plate structure of the present application has a simple process, a fast production speed, and a low manufacturing cost, and can especially solve the problem of a large-span, lightweight, and portable cover plate.

[0075] (2) The present application adopts plates and standard nuts and bolts of standardized specifications and sizes to reduce processing cycle and manufacturing difficulty.

[0076] (3) The structure of the present application is simple and all parts are detachable, making maintenance and repair easy.

[0077] The composite material assembly cover plate structure of the present application is formed by a flat tooling vacuum tank and fixed by bolts and nuts. It has low cost, easy disassembly and good maintainability.

[0078] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0079] The above embodiments are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A composite material assembled cover plate structure, characterized in that: include: A cover plate assembly, wherein the cover plate assembly is a multi-layer structure, and the middle part of the cover plate assembly is filled with a foam carbon fiber reinforced composite layer and an edge reinforcement structure; The edge of the cover plate assembly is provided with a connecting portion 1 for connecting with the inner edge of the wellhead; The cover plate assembly comprises: A lower skin, wherein the edge reinforcement structure is fixedly connected to the edge of the lower skin, and the foam carbon fiber reinforced composite layer is fixedly connected to the middle part of the lower skin; The upper skin is fixedly connected to the foam carbon fiber reinforced composite layer and the edge reinforcement structure.

2. A composite material assembled cover plate structure according to claim 1, characterized in that: The foam carbon fiber reinforced composite layer comprises foam (7) and a plurality of reinforcement parts, the bottom of the foam (7) is fixedly connected to the lower skin, the top of the foam (7) is fixedly connected to the upper skin, and the reinforcement parts are embedded in the foam (7).

3. A composite material assembled cover plate structure according to claim 2, characterized in that: The reinforcement portion comprises a plurality of carbon fiber reinforcement ribs (8), and the plurality of carbon fiber reinforcement ribs (8) are surrounded and embedded in the foam (7).

4. The composite material assembled cover plate structure according to claim 1, characterized in that: The edge reinforcement structure comprises a plurality of metal embedded parts (6), the bottom of the metal embedded parts (6) is fixedly connected to the lower skin, the top of the metal embedded parts (6) is fixedly connected to the upper skin, and the plurality of metal embedded parts (6) are distributed along the edge of the lower skin.

5. The composite material assembled cover plate structure according to claim 1, characterized in that: The connecting portion 1 comprises a plurality of fixed supports (5), the fixed supports (5) are fixedly connected to the bottom of the cover plate assembly, the plurality of fixed supports (5) are distributed along the bottom edge of the cover plate assembly, and the edge of the cover plate assembly is fixedly connected with a pin 1 (3) for pinning with the inner edge of the wellhead.

6. The composite material assembled cover plate structure according to claim 1, characterized in that: The cover plate assembly is composed of a cover plate 2 (2) located in the middle and a plurality of cover plates 1 (1) arranged around the cover plate 2 (2), and the cover plate 2 (2) is detachably connected to the cover plate 1 (1) via a connecting portion 2.

7. The composite material assembled cover plate structure according to claim 6, characterized in that: The second connecting part comprises a second latch pin (4), one end of which is fixed to the edge of the second cover plate (2), and the other end of which is pin-connected to the edge of the first cover plate (1).

8. A method for preparing a composite material assembled cover plate structure, used for preparing a composite material assembled cover plate structure according to any one of claims 1 to 7, characterized in that: The steps include: Use carbon fiber to make the lower skin and lay it up; Installing the edge reinforcement structure and the foam carbon fiber reinforced composite layer to the lower skin; Laying the upper skin on the edge reinforcement structure and the surface of the foam carbon fiber reinforced composite layer, putting it into a vacuum bag and pressurizing it; The vacuum bag containing the cover plate assembly is pushed into a vacuum tank for heating and curing.

9. The method for preparing a composite material assembled cover plate structure according to claim 8, characterized in that: The preparation of the foam carbon fiber reinforced composite layer comprises the following steps: Take the cut foam (7), lay a plurality of the carbon fiber reinforcement ribs (8) on the surface of the foam (7), put the foam (7) and the plurality of the carbon fiber reinforcement ribs (8) into a vacuum bag and push it into a vacuum tank for heating and curing.

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