阅读说明：本技术 一种固定复材面板的紧固件结构及方法 (Fastener structure and method for fixing composite panel ) 是由 袁艳华 李爱平 郭沛欣 张一峰 孙晓磊 顾家荣 许村官 高猛 张廷羽 于 2021-09-09 设计创作，主要内容包括：本发明公开一种固定复材面板的紧固件结构,用于将复材夹芯板固定至结构件表面,其包括头部设置有注胶孔的螺栓、密封垫片、垫片以及螺母。密封垫片包括通孔,可套接于螺栓的螺纹部,且可设置于螺栓头部与复材夹芯板之间,其通孔的内表面与螺纹部贴合。垫片可套接于螺栓的螺纹部,且可设置于结构件与自锁螺母之间。螺母适配于螺栓的螺纹部。(The invention discloses a fastener structure for fixing a composite panel, which is used for fixing a composite sandwich panel to the surface of a structural member. The sealing gasket comprises a through hole which can be sleeved on the thread part of the bolt and can be arranged between the bolt head and the composite sandwich plate, and the inner surface of the through hole is attached to the thread part. The gasket can be sleeved on the threaded part of the bolt and can be arranged between the structural part and the self-locking nut. The nut is fitted to the threaded portion of the bolt.)

1. A fastener structure for securing a composite panel to a surface of a structural member, the fastener structure comprising:

a bolt having a head portion provided with a glue injection hole, wherein the glue injection hole is configured to enable a sealant to be injected into a gap between the bolt and the bolt mounting hole from the glue injection hole;

a sealing gasket comprising a through hole, the sealing gasket configured to be sleeved on the threaded portion of the bolt and to be disposed between the bolt head and the composite sandwich panel, an inner surface of the through hole configured to be capable of fitting with the threaded portion;

a washer configured to be able to be fitted over the threaded portion of the bolt and to be able to be disposed between the structural member and the self-locking nut; and

a nut configured to be capable of being engaged with the threaded portion of the bolt.

2. The fastener structure of claim 1, wherein the nut is a self-locking nut; and/or

The fastener structure further comprises a glue outlet hole, wherein the glue outlet hole is configured to enable the sealant injected into the gap to overflow from the glue outlet hole.

3. The fastener structure of claim 1, wherein the threaded portion of the bolt is stepped and comprises a first portion and a second portion, wherein the diameter of the first portion is greater than the diameter of the second portion, and the length of the first portion is equal to or less than the thickness of the composite sandwich panel.

4. The fastener structure of claim 3, wherein a side of said sealing gasket adjacent said through hole is bent upwardly such that an inner surface of said through hole abuts a lower surface of said first portion.

5. The fastener structure of claim 1, wherein the threaded portion of the bolt is stepped, and includes a second portion and a third portion, the third portion corresponding to an installation position of the self-locking nut, and a diameter of the third portion is smaller than a diameter of the second portion and is adapted to the self-locking nut.

6. The fastener structure of claim 1, wherein the bottom of the bolt comprises a hexagonal recess.

7. The fastener structure of any one of claims 1 to 6, further comprising a shock absorbing pad disposed between the composite sandwich panel and the sealing gasket.

8. A method of securing a composite panel using the fastener construction of claim 7, comprising the steps of:

placing a sealing gasket and a shock pad on the surface of the structural member in sequence, so that the sealing gasket and the shock pad are coaxial with the mounting hole in the structural member;

placing a composite sandwich plate, wherein the mounting hole of the composite sandwich plate is coaxial with the mounting hole on the structural member;

placing bolts so that the bolts sequentially penetrate through the mounting holes of the composite sandwich plate, the shock absorption pads, the sealing gaskets and the mounting holes on the structural member to place the composite sandwich plate;

sleeving a gasket and a self-locking nut at the tail part of the bolt, and screwing the self-locking nut according to a preset torque; and

and pouring sealant from the glue injection hole until the sealant overflows from the glue outlet hole.

9. The method of claim 8, wherein the preset torque satisfies: such that the cushion compresses 20% to 40%.

10. The method of claim 8 wherein said sealant material is an epoxy glue.

Technical Field

The invention relates to the technical field of fasteners, in particular to a fastener structure for fixing a composite panel and an installation method.

Background

Composite materials (composite materials for short) have been widely used in various industries because the advantages of the properties of the materials of the components can be maintained, and the comprehensive properties which cannot be achieved by a single composition material can be further obtained by the complementation and the correlation of the properties of the components. The composite panel is a plate made of composite materials and comprises a sandwich plate, a fiber plate and the like.

In the field of wind power generation, a composite sandwich panel is often used as a housing of a wind power generator, and the composite sandwich panel can be connected with a structural member through a fastener such as a bolt. However, the conventional bolt is easily loosened or leaked after being installed in the composite material, thereby causing corrosion or damage to the structure of the wind turbine generator.

Disclosure of Invention

To address some or all of the problems of the prior art, in one aspect, the present invention provides a fastener structure for fixing a composite panel, for fixing a composite sandwich panel to a structural member surface, the fastener structure comprising:

the head of the bolt is provided with a glue injection hole and a glue outlet hole;

the sealing gasket comprises a through hole, the sealing gasket is sleeved on the threaded part of the bolt and is arranged between the bolt head and the composite sandwich plate, and the inner surface of the through hole is attached to the threaded part;

the gasket is sleeved on the threaded part of the bolt and arranged between the structural part and the self-locking nut; and

and the self-locking nut is matched with the tail part of the threaded part of the bolt.

Further, the fastener structure further comprises a shock pad which is arranged between the composite sandwich plate and the sealing gasket.

Furthermore, the threaded portion of the bolt is in a step shape and comprises a first portion and a second portion, wherein the diameter of the first portion is larger than that of the second portion, and the length of the first portion is equal to or smaller than the thickness of the composite sandwich panel.

Furthermore, the central part of the sealing gasket is bent upwards and is attached to the lower edge of the first part.

Further, the threaded portion of the bolt is stepped and comprises a second portion and a third portion, the third portion corresponds to the installation position of the self-locking nut, and the diameter of the third portion is smaller than that of the second portion and is matched with the self-locking nut.

Further, the bottom of the threaded portion includes a hexagonal recess.

Further, the material of the shock pad is rubber.

In another aspect, the present invention provides a method for installing a composite panel by using the fastener structure, including:

placing a sealing gasket and a shock pad on the surface of the structural member in sequence, wherein the sealing gasket and the shock pad are coaxial with the mounting hole of the structural member;

placing the composite sandwich board;

putting a bolt, installing a gasket and a self-locking nut, and screwing the self-locking nut according to a preset torque; and

and pouring sealant from the glue injection hole until the sealant overflows from the glue outlet hole.

Further, the preset torque satisfies: such that the cushion compresses 20% to 40%.

Further, the sealant material is epoxy glue.

According to the fastener structure and the method for fixing the composite panel, provided by the invention, the glue injection hole and the glue outlet hole are formed in the top of the bolt, and after the bolt is installed, pouring sealant is injected, so that the bolt and the composite sandwich board are completely sealed, and the problem of water leakage of the bolt hole is effectively solved. The fastener structure solves the problem that after the bolt is installed on the composite panel, the moment of the bolt is lost due to aging of the composite panel, and then the bolt is loosened through a rigid force transmission structure of the bolt, the sealing gasket, the structural member, the gasket and the nut. In addition, the shock pad can also effectively reduce the easy damaged problem of panel that leads to because the vibration of compound material panel and skeleton.

Drawings

To further clarify the above and other advantages and features of embodiments of the present invention, a more particular description of embodiments of the present invention will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. In the drawings, the same or corresponding parts will be denoted by the same or similar reference numerals for clarity.

FIG. 1 is a schematic structural view of a fastener arrangement for securing composite panels in accordance with one embodiment of the present invention;

FIG. 2 is a schematic structural view of a fastener arrangement for securing composite panels in accordance with one embodiment of the present invention;

FIG. 3 is a schematic flow chart illustrating a method of securing a composite panel in accordance with one embodiment of the present invention; and

fig. 4 is a schematic diagram illustrating the effect of fixing the composite panel according to an embodiment of the present invention.

Detailed Description

In the following description, the present invention is described with reference to examples. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details, or with other alternative and/or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention. Similarly, for purposes of explanation, specific numbers, materials and configurations are set forth in order to provide a thorough understanding of the embodiments of the invention. However, the invention is not limited to these specific details. Further, it should be understood that the embodiments shown in the figures are illustrative representations and are not necessarily drawn to scale.

Reference in the specification to "one embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

In this specification, "disposed on …", "disposed over …" and "disposed over …" do not exclude the presence of an intermediate therebetween, unless otherwise specified. Further, "disposed on or above …" merely indicates the relative positional relationship between two components, and may also be converted to "disposed below or below …" and vice versa in certain cases, such as after reversing the product direction.

In this specification, unless specifically stated otherwise, the terms "a" and "an" do not exclude the presence of a plurality of elements.

It is further noted herein that in embodiments of the present description, only a portion of the components or assemblies may be shown for clarity and simplicity, but those of ordinary skill in the art will appreciate that, under the teachings of the present description, required components or assemblies may be added as needed in particular scenarios.

It is also noted herein that, within the scope of this specification, the terms "same", "equal", and the like do not mean that the two values are absolutely equal, but allow some reasonable error, that is, the terms also encompass "substantially the same", "substantially equal", and the like. By analogy, in this specification the terms "perpendicular to", "parallel to" and the like in the directions of the tables also cover the meaning of "substantially perpendicular to", "substantially parallel to".

The present invention is based on the following insight of the inventors: the problem of damage easily appears after current combined material installation is accomplished, and its root cause lies in that ordinary bolt installs easy infiltration behind combined material, and the compound material panel is ageing easily after the infiltration for pretightning force is lost after the bolted connection, and the pretightning force is lost, and the bolt is not hard up, and then makes the compound material panel not hard up, in case take place the vibration, will make the compound material panel is damaged. Therefore, if the water seepage of the bolt can be reduced, the damage rate of the composite panel can be effectively reduced. Based on the structure, the invention provides a fastener structure and a method for fixing a composite panel, solves the problem of water leakage by pouring sealant between a bolt and the composite panel, and can be applied to the fields of wind driven generators and the like. The solution of the invention is further described below with reference to the accompanying drawings of embodiments.

Fig. 1 shows a schematic structural view of a fastener structure for fixing a composite panel according to an embodiment of the present invention. As shown in fig. 1, a fastener structure for securing a composite panel, which can be used to secure a composite sandwich panel 001 to a surface of a structural member 002, comprises: bolt 101, sealing gasket 102, washer 104 and self-locking nut 105. In the embodiment of the present invention, to ensure stability, the bolt 101, the sealing gasket 102, and the gasket 104 should be coaxial with the mounting holes of the composite sandwich panel 001 and the structural member 002.

In order to facilitate the pouring of the sealant, the head of the bolt 101 is provided with a sealant pouring hole 111 and a sealant discharging hole 112, and the positions of the sealant pouring hole 111 and the sealant discharging hole 112 correspond to the mounting hole 011 on the composite sandwich panel 001, so that the sealant can be poured into the mounting hole 011 from the sealant pouring hole 111 and then overflows through the sealant discharging hole 112.

The sealing gasket 102 includes a through hole so that it can be sleeved on the threaded portion of the bolt, the sealing gasket 102 is disposed between the bolt head and the composite sandwich plate 001, and the inner surface of the through hole is attached to the threaded portion, so that a sealing space is formed between the mounting hole 011 on the sealing gasket 102 and the composite sandwich plate 001 and the head of the bolt. In order to ensure the sealing effect, in an embodiment of the present invention, the threaded portion of the bolt 101 is provided with a step shape, and includes a first portion 121 and a second portion 122, wherein the diameter of the first portion 121 is greater than the diameter of the second portion 122, the length of the first portion 121 is equal to or slightly less than the thickness of the composite sandwich plate 001, and the inner diameter of the through hole of the sealing gasket 102 is adapted to the diameter of the second portion, so that the sealing gasket 102 can be attached to the lower surface of the first portion 121. In another embodiment of the present invention, the central portion of the sealing gasket 102 and the side near the through hole are bent upwards so that the inner surface of the through hole is attached to the lower surface of the first portion, and in order to better satisfy the sealing requirement, the thickness of the sealing gasket 102 is preferably equal to or close to half of the difference between the diameters of the first portion 121 and the second portion 122.

The bolt is fixed by a self-locking nut 105, and the self-locking nut 105 is matched with the part of the bolt 101 extending out of the structural member 002. In order to increase the contact area, reduce the pressure and thus prevent the bolt from loosening, a spacer 104 may be provided between the self-locking nut 105 and the structural member 002. In order to better prevent the self-locking nut 105 from loosening, in an embodiment of the present invention, the threaded portion of the bolt 101 may further include a third portion 123, specifically, at a position corresponding to the self-locking nut 105 at the tail of the second portion 122, the diameter of the threaded portion is further reduced to form the third portion 123, and the diameter of the third portion 123 is adapted to the inner diameter of the self-locking nut 105.

To further reduce the effect of vibration on the composite panel, in one embodiment of the present invention, a shock absorbing pad 103 may be further disposed between the composite sandwich panel 001 and the sealing gasket 102. Fig. 2 shows a structural schematic diagram of a fastener structure for fixing a composite panel according to another embodiment of the present invention, and as shown in fig. 2, the center of the shock pad 103 has a through hole so that it can be sleeved on the threaded portion of the bolt 101. When installed, the shock absorbing pad 103 is coaxial with the sealing gasket 102. In one embodiment of the present invention, the material of the shock pad is a rubber material such as silicone rubber. In order to ensure the sealing effect, the diameter of the through hole on the shock pad 103 is equal to or slightly larger than the diameter of the mounting hole 011 on the composite sandwich board 001.

For ease of operation, the bottom of the bolt 101 may also be provided with a hexagonal recess 124, i.e. a hexagonal head, which may be adapted to an existing operating tool such as a hex wrench.

Fig. 3 is a flow chart illustrating a method of securing a composite panel according to an embodiment of the invention. As shown in fig. 3, the method for installing the composite panel by using the fastener structure comprises the following steps:

first, in step 301, pre-installation. Placing a sealing gasket and a shock pad on the surface of a structural member in sequence, enabling the sealing gasket and the shock pad to be coaxial with an installation hole on the structural member, then placing a composite sandwich plate, enabling the installation hole of the composite sandwich plate to be coaxial with the installation hole on the structural member, and placing a bolt so as to enable the bolt to sequentially penetrate through the installation hole of the composite sandwich plate, the shock pad, the sealing gasket and the installation hole on the structural member;

next, at step 302, torque is applied. The tail of the bolt is sleeved with a gasket, then the self-locking nut is hidden, and the self-locking nut is screwed up according to a preset torque in an electric or manual mode, wherein in one embodiment of the invention, the preset torque meets the following requirements: compressing the cushion by 20% to 40%, preferably 30%; and

finally, in step 303, sealant is poured. And pouring sealant from the glue injection hole at the head part of the bolt until the sealant overflows from the glue outlet hole, and filling the sealing space formed between the sealing gasket and the mounting hole in the composite sandwich plate and the head part of the bolt with the sealant, wherein the problem of water leakage of the bolt hole can be effectively solved as shown in fig. 4. In one embodiment of the present invention, the sealant may be a common sealant material such as epoxy glue.

According to the fastener structure and the method for fixing the composite panel, provided by the invention, the glue injection hole and the glue outlet hole are formed in the top of the bolt, and after the bolt is installed, pouring sealant is injected, so that the bolt and the composite sandwich board are completely sealed, and the problem of water leakage of the bolt hole is effectively solved. The fastener structure solves the problem that after the bolt is installed on the composite panel, the bolt torque is lost due to aging of the composite panel, and then the bolt is loosened through a rigid force transmission structure of the bolt, the sealing gasket, the structural member, the gasket and the nut. In addition, the shock pad can also effectively reduce the easy damaged problem of panel that leads to because compound material panel and skeleton vibration.

While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to persons skilled in the relevant art that various combinations, modifications, and changes can be made thereto without departing from the spirit and scope of the invention. Thus, the breadth and scope of the present invention disclosed herein should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.