阅读说明：本技术 一种可靠的玻璃钢检查门结构 (Reliable glass steel inspection door structure ) 是由 景发明 李冠群 王利忠 李树鹏 王禹 于 2019-12-05 设计创作，主要内容包括：一种可靠的玻璃钢检查门结构,其特征在于：在玻璃钢门板本体内部预埋一个带有焊接沉头螺钉的金属板使二者合模固化成为一体,金属板上面粘接整体式金属支架,同时金属支架与玻璃钢门板本体的贴合处涂有密封胶,通过垫圈、防松螺母固定金属支架于金属板上面。本发明在检查门内部预埋了带有焊接螺柱的金属板,并使用垫圈和防松螺母固定金属支架,使用机械连接保证了结构可靠性,避免原胶粘结构中存在的人为糊制等不可控因素；将金属支架由分体式改为整体式,同时在金属支架与玻璃钢门板本体的贴合处涂打密封胶,防止酸碱液体渗入,对胶粘结构形成腐蚀。(A reliable glass steel inspection door structure which characterized in that: a metal plate with a welding countersunk head screw is pre-embedded in the glass fiber reinforced plastic door plate body to enable the glass fiber reinforced plastic door plate body and the metal plate to be combined and solidified into a whole, an integral metal support is bonded on the metal plate, meanwhile, sealant is coated at the joint of the metal support and the glass fiber reinforced plastic door plate body, and the metal support is fixed on the metal plate through a gasket and a locknut. According to the invention, the metal plate with the welding stud is pre-embedded inside the inspection door, the metal bracket is fixed by using the washer and the locknut, the structural reliability is ensured by using mechanical connection, and uncontrollable factors such as artificial pasting and the like existing in an original adhesive structure are avoided; the metal support is changed from a split type to an integral type, and meanwhile, the joint of the metal support and the glass fiber reinforced plastic door plate body is coated with the sealant, so that acid-base liquid is prevented from permeating, and the adhesive structure is prevented from being corroded.)

1. A reliable glass steel inspection door structure which characterized in that: a metal plate with a welding countersunk head screw is pre-embedded in the glass fiber reinforced plastic door plate body to enable the glass fiber reinforced plastic door plate body and the metal plate to be combined and solidified into a whole, an integral metal support is bonded on the metal plate, meanwhile, sealant is coated at the joint of the metal support and the glass fiber reinforced plastic door plate body, and the metal support is fixed on the metal plate through a gasket and a locknut.

2. A reliable glass reinforced plastic inspection door structure as in claim 1, wherein: the glass fiber reinforced plastic door plate is characterized in that a buffer support is arranged in a groove in the lower portion of the glass fiber reinforced plastic door plate body and used for preventing impact on a door mechanism when the door is opened and closed.

3. A reliable glass reinforced plastic inspection door structure as in claim 1, wherein: a butterfly washer is arranged between the locknut and the washer to further prevent the metal bracket from loosening.

4. A reliable glass reinforced plastic inspection door structure as in claim 1, wherein: the metal support is of an integral structure, and the strength is improved.

Technical Field

The invention relates to an inspection door structure of a railway vehicle, in particular to an inspection door structure on a glass fiber reinforced plastic apron board in a one-position end bogie area.

Background

The glass fiber reinforced plastic skirting board is arranged in the area of the bogie at the first end of the CRH380B series motor train unit and the CR400BF motor train unit. The first apron board is provided with an openable inspection door to meet the daily overhaul and maintenance requirements. The inspection door plate is made of glass fiber reinforced plastic, the back of the inspection door plate is made of structural adhesive bonding metal parts and serves as a support, and the inspection door plate is matched with the framework of the glass fiber reinforced plastic body to complete opening and closing of the inspection door. However, as the train runs for a long time, the structural adhesive is aged, meanwhile, the adhesive structure is corroded by the infiltration of acid and alkaline liquids such as rainwater and car washing liquid, and the metal part support continuously has the conditions of adhesive cracks, adhesive failure and even separation from a door panel, so that the driving safety is seriously influenced.

Disclosure of Invention

The invention aims to improve the connection mode of the existing inspection door and a metal bracket, improve the ageing resistance and corrosion resistance of an adhesive structure, increase the reliability of the connection of glass fiber reinforced plastic and a metal piece and eliminate potential safety hazards.

In order to achieve the above object, the present invention provides a reliable inspection door structure made of glass fiber reinforced plastics, which is characterized in that: a metal plate with a welding countersunk head screw is pre-embedded in the glass fiber reinforced plastic door plate body to enable the glass fiber reinforced plastic door plate body and the metal plate to be combined and solidified into a whole, an integral metal support is bonded on the metal plate, meanwhile, sealant is coated at the joint of the metal support and the glass fiber reinforced plastic door plate body, and the metal support is fixed on the metal plate through a gasket and a locknut.

The glass fiber reinforced plastic door plate is characterized in that a buffer support is arranged in a groove in the lower portion of the glass fiber reinforced plastic door plate body and used for preventing impact on a door mechanism when the door is opened and closed.

A butterfly washer is arranged between the locknut and the washer to further prevent the metal bracket from loosening.

The metal support is of an integral structure, so that the strength is improved, and the stress state is better.

Compared with the prior art, the invention has the following advantages and progresses:

(1) the metal plate with the welding stud is embedded in the inspection door, the metal support is fixed by the washer and the locknut, the structural reliability is guaranteed by mechanical connection, and uncontrollable factors such as manual pasting and the like existing in an original adhesive structure are avoided.

(2) A layer of redundant protection is provided between the contact surface of the metal support and the inspection door by using the structural adhesive, and the structural adhesive is sealed by using the sealant at the periphery of the contact surface, so that the structural adhesive is prevented from being invaded by rainwater and cleaning liquid, and the service life of the structural adhesive is prolonged.

(3) The metal support is changed from a split type to an integral type, and meanwhile, the joint of the metal support and the glass fiber reinforced plastic door plate body is coated with the sealant, so that acid-base liquid is prevented from permeating, and the adhesive structure is prevented from being corroded.

Drawings

FIG. 1 is an exploded schematic view of the present invention;

FIG. 2 is a front view of the present invention;

fig. 3 is a sectional view taken along line a-a of fig. 2.

Detailed Description

Referring to fig. 1-3, the embodiment of the invention comprises a glass fiber reinforced plastic door plate body 1, a metal plate 2, a metal bracket 3, a buffer bracket 4, a gasket 5, a butterfly gasket 6 and a locknut 7, wherein during installation, the metal plate 2 welded with a countersunk screw is pre-embedded into the glass fiber reinforced plastic door plate body 1 to be integrated, after the glass fiber reinforced plastic door plate body is dried and solidified, an anti-aging epoxy structural adhesive DP420 is smeared on the inner side of the glass fiber reinforced plastic door plate body 1 and the back of the metal bracket 3 and is attached together, the gasket 5, the butterfly gasket 6 and the locknut 7 are used for fixing the metal bracket 3 and applying torque, and the buffer bracket is arranged in a groove at the lower part of the glass fiber reinforced plastic door plate body and is used for preventing impact on a door mechanism when an inspection door is opened and closed. And finally, coating the periphery of the binding surface of the metal bracket 3 and the glass fiber reinforced plastic door panel body 1 with a Xika sealant.

Compared with the existing adhesive pasting structure of the inspection door and the metal bracket, the invention changes the fixing mode of the metal bracket from a single adhesive pasting structure into a mode of mainly using a mechanical connecting structure, simultaneously provides a redundant protection mode by using the adhesive structure, and adopts sealant to form protection, thereby greatly improving the reliability of the structure and prolonging the service life. Through simulation analysis calculation and static load and fatigue load tests, the structure meets the requirements.