CN214390965U - Anti-corrosion bolt assembly for bridge - Google Patents

Anti-corrosion bolt assembly for bridge Download PDF

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Publication number
CN214390965U
CN214390965U CN202022517911.5U CN202022517911U CN214390965U CN 214390965 U CN214390965 U CN 214390965U CN 202022517911 U CN202022517911 U CN 202022517911U CN 214390965 U CN214390965 U CN 214390965U
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China
Prior art keywords
layer
protective cover
paint
bolted connection
connection spare
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CN202022517911.5U
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Inventor
景强
高文博
苏权科
杨海山
杨振波
张亮
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HONG KONG-ZHUHAI-MACAO BRIDGE AUTHORITY
Avic Biam New Materials Technology Engineering Co ltd
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HONG KONG-ZHUHAI-MACAO BRIDGE AUTHORITY
Avic Biam New Materials Technology Engineering Co ltd
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Abstract

The utility model discloses an anticorrosive bolt assembly for bridge relates to the on-spot protection field in bridge site, including bolted connection spare, painted layer, sealing glue layer and protective cover, through brushing priming paint, intermediate coat and finish paint in bolted connection spare's exposed surface in proper order, will fill the protective cover that has sealed glue again and detain on bolted connection spare, carry out triple protection through adopting japanning, sealing glue and protective cover to the bolt, realized that the construction is simple, the durability is good, the good effect of corrosion resistance.

Description

Anti-corrosion bolt assembly for bridge
Technical Field
The utility model relates to a field of protection at bridge site especially relates to an anticorrosive bolt assembly for bridge.
Background
A bridge structure adopts a large number of bolts, such as high-strength bolts for anti-skid friction surfaces, guardrail foundation bolts, bridge support bolts and the like, the bridge is positioned under severe atmospheric corrosion conditions of rivers, lakes, seas and the like, particularly, due to the fact that a large number of gaps exist in bolt parts (including bolts, nuts, gaskets and the like), corrosive media such as water, salt, pollutants and the like are easy to remain, water containing the corrosive media and air enter the gaps to corrode the bolts, gap corrosion occurs, and the corrosion speed of the bolts is obviously higher than that of other components. The serious corrosion of the bolt can lead to the strength reduction of the connecting member, can influence the service life of the bridge structure and has great potential safety hazard. The bolts are difficult to replace in the designed service life of the bridge and the replacement cost is high, so that the bolts of the bridge need to be protected.
In the manufacturing process of the bolt, the surfaces of the bolt and the nut are subjected to special anticorrosion treatment in a factory, and a simple protection structure is provided, such as a phosphating film prefabricated bolt in a factory; bolts with hot dip galvanizing in factories are adopted; bolts using a factory dacromet process; bolts using a factory zincing process, and the like. However, due to tolerance fit of bolts, the thickness of the anticorrosive coating of the protective structure subjected to the factory anticorrosive process is generally not more than 10 μm, and the thin anticorrosive prefabricated coating does not have good durability in a high-corrosion environment.
The existing bridge bolt protection technology is as follows:
(1) coating technology of primer, intermediate paint and finish paint
The existing bridge site general protection technology of bridge bolts adopts a coating method, which comprises the following steps: and (3) mechanically or manually polishing the exposed bolt joint part, wherein the treatment grade is St3 grade, brushing (1-2 times) epoxy primer, and coating intermediate paint and finish paint (colored paint) according to a paint matching system of the adjacent part of the bolt.
At present, bridges are protected by the protection method at home and abroad, according to the current situation of domestic investigation, land bridges and northern bridges in dry climate have certain protection effect, but for bridges in high humidity, high salinity and low latitude areas, bolts have serious corrosion problem after being coated for 3 years.
(2) Protection technology of primer, antirust grease and PVC protective cover
In the new construction of the Hangzhou bay bridge, a primer, antirust butter and PVC protective cover protection technology is adopted, and the method comprises the following steps: and (3) mechanically or manually polishing the exposed bolt joint part, wherein the treatment grade is St3 grade, brushing epoxy primer, smearing rust-proof butter on the exposed bolt part, and covering a PVC protective cover for protection.
After 5 years of working condition examination, the protective effect of the technology is poor due to the fact that the PVC cap is aged and becomes brittle and the antirust butter runs off under the sun exposure caused by external factors such as corrosive environment, severe weather and the like.
(3) Primer, intermediate paint, polysulfide sealant and fluorocarbon finish protection technology
The method comprises the following steps that maintenance protection is carried out on guardrail foundation bolts again in 2013 of the Zhejiang golden pool bridge and 2015 of the Hangzhou Bay bridge, and the method comprises the following steps: and (3) mechanically or manually polishing the exposed bolted part, wherein the treatment grade is St3 grade, brushing (1-2) epoxy zinc-rich primer of 80 mu m, brushing 2 epoxy micaceous iron intermediate paint of 120 mu m, smearing polysulfide sealant of 500 mu m, and finally coating 2 fluorocarbon finish paint of 80 mu m. The method has good operation effect at present.
But the defects that the construction of the polysulfide sealant is difficult, the construction period is long, the whole protection system is completely constructed, and the appearance effect is general.
Therefore, an anticorrosive bolt assembly which is simple in construction process, improves durability and ensures safety and reliability of a bridge connection structure is urgently needed in the market.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a anticorrosive bolt assembly is used to bridge to solve the problem that above-mentioned prior art exists, can realize that the construction is simple, the durability is good, the corrosion resistance is good.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides an anticorrosive bolt assembly for bridge, including bolted connection spare, painted layer, sealing glue layer and protective cover, bolted connection spare includes bolt, nut and gasket, the bolt is used for inserting the fixed substrate surface of needs, the bolt passes the nut in proper order the gasket with the substrate, and with nut threaded connection, painted layer includes priming paint layer, intermediate coat layer and finish coat layer of applying paint with a brush on bolted connection spare's the exposed surface in proper order, the protective cover is used for detaining the outside of bolted connection spare's exposed surface, and can with bolted connection spare is sealed inside the protective cover, sealing glue layer is filled bolted connection spare exposed surface with between the protective cover, the diameter of protective cover is greater than the diameter of gasket.
Preferably, the number of the primer layers is 1-2, the film thickness of the primer layers is 60-80 μm, and the primer layers are epoxy primers or epoxy zinc-rich primers.
Preferably, the number of the intermediate paint layers is 1-2, the film thickness of the intermediate paint layers is 100-120 μm, and the intermediate paint layers are epoxy intermediate paints or epoxy micaceous iron intermediate paints.
Preferably, the surface paint layer is 1-2, the film thickness of the surface paint layer is 60-80 μm, and the surface paint layer is fluorocarbon finish paint.
Preferably, the sealant layer is a two-component crosslinking sealant or a polysulfide sealant.
Preferably, the material of the protective cover is ASA plastic or PVDF plastic.
The utility model discloses following beneficial technological effect has been gained for prior art:
the utility model also discloses an anticorrosive bolt assembly, including bolted connection spare, painted layer, sealing glue layer and protective cover, through brushing priming paint, intermediate coat and finish paint in proper order at bolted connection spare's exposed surface, will fill the protective cover that has sealed glue again and detain on bolted connection spare, carry out triple protection through adopting japanning, sealing glue and protective cover to the bolt, realized that the construction is simple, the durability is good, the good effect of corrosion resistance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of an anti-corrosion bolt assembly for a bridge in the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
in the figure: 1-base material, 2-gasket, 3-nut, 4-bolt, 5-priming paint layer, 6-intermediate paint layer, 7-finish paint layer, 8-sealant layer and 9-protective cover.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a protection method and anticorrosive bolt assembly of bolt for bridge to solve the problem that prior art exists.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The embodiment provides an anticorrosive bolt assembly, including bolted connection spare, the coating layer, sealing glue layer and protective cover 9, bolted connection spare includes bolt 4, nut 3 and gasket 2, bolt 4 is used for inserting 1 surface of the substrate that needs to be fixed, bolt 4 passes nut 3 in proper order, gasket 2 and substrate 1, and with 3 threaded connection of nut, the coating layer includes the priming paint layer of applying paint with a brush on bolted connection spare's the exposed surface in proper order, middle lacquer layer and finish paint layer, protective cover 9 is used for detaining the outside at bolted connection spare's exposed surface, and can seal bolted connection spare inside protective cover 9, sealing glue layer fills between bolted connection spare's exposed surface and protective cover 9, the diameter of protective cover 9 is greater than the diameter of gasket 2.
In the specific application process, firstly, the bolt connecting piece is installed on the surface of a substrate 1 needing to be fixed, then the exposed outer surface of the bolt connecting piece is sequentially coated with a primer layer 5, an intermediate paint layer 6 and a finish paint layer 7, as shown in fig. 2, then a protective cover 9 filled with sealant is buckled on the bolt connecting piece, so that the sealant is filled between the protective cover 9 and the exposed outer surface of the bolt connecting piece, a sealing glue layer 8 is formed, and the bolt is protected in a triple mode through painting, the sealing glue layer 8 and the protective cover 9, so that the effects of simplicity in construction, good durability and good corrosion resistance are achieved.
In the embodiment, in order to improve the anti-rust performance of the bolt joint, the number of the primer layers 5 is 1-2, the film thickness of the primer layers 5 is 60-80 μm, and the primer layers 5 are epoxy primers or epoxy zinc-rich primers, preferably epoxy zinc-rich primers.
In the embodiment, in order to improve the corrosion resistance of the bolt joint and the adhesion of the intermediate paint, the number of the intermediate paint layers 6 is 1-2, the thickness of the intermediate paint layers 6 is 100-120 μm, and the intermediate paint layer 6 is an epoxy intermediate paint or an epoxy micaceous iron intermediate paint, preferably an epoxy micaceous iron intermediate paint.
In the embodiment, in order to improve the heat insulation and temperature reduction performance of the bolt joint, the finish paint layer 7 is 1-2, the film thickness of the finish paint layer 7 is 60-80 μm, and the finish paint layer 7 is fluorocarbon finish paint.
In the present embodiment, in order to improve the sealing performance of the bolt joint, the sealant layer 8 is a two-component cross-linking type sealant or a polysulfide sealant, preferably a polysulfide sealant.
In this embodiment, in order to improve the corrosion resistance of the bolted joint, the protective cover 9 is made of ASA plastic or PVDF plastic, and the ASA plastic protective cover is used for the bolted joint without direct sunlight, so that the weather resistance and wear resistance of the bolted joint are improved, and the PVDF plastic protective cover is used for the bolted joint with direct sunlight, so that not only are the wear resistance and impact resistance of the bolted joint improved, but also the fading resistance and ultraviolet resistance in an extremely severe and harsh environment are improved.
It should be noted that, the utility model provides an anticorrosive bolt subassembly for bridge is not limited to the bridge field, can all adopt at other application bolted connection's scene.
The utility model discloses the principle and the implementation mode of the utility model are explained by applying the concrete examples, and the explanation of the above examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present description should not be construed as a limitation of the present invention.

Claims (6)

1. The utility model provides an anticorrosive bolt assembly for bridge which characterized in that: including bolted connection spare, painted layer, sealing glue layer and protective cover, bolted connection spare includes bolt, nut and gasket, the bolt is used for inserting needs fixed substrate surface, the bolt passes in proper order the nut the gasket with the substrate, and with nut threaded connection, painted layer includes priming paint layer, intermediate coat layer and finish coat layer that apply paint on bolted connection spare's the exposed surface in proper order, the protective cover is used for detaining bolted connection spare's the outside of exposed surface, and can with bolted connection spare is sealed inside the protective cover, sealing glue layer fills bolted connection spare's exposed surface with between the protective cover, the diameter of protective cover is greater than the diameter of gasket.
2. The corrosion prevention bolt assembly for a bridge according to claim 1, wherein: the number of the primer layers is 1-2, the film thickness of the primer layers is 60-80 mu m, and the primer layers are epoxy primers or epoxy zinc-rich primers.
3. The corrosion prevention bolt assembly for a bridge according to claim 1, wherein: the number of the intermediate paint layers is 1-2, the film thickness of the intermediate paint layers is 100-120 mu m, and the intermediate paint layers are epoxy intermediate paints or epoxy micaceous iron intermediate paints.
4. The corrosion prevention bolt assembly for a bridge according to claim 1, wherein: the surface paint layer is 1-2 times, the film thickness of the surface paint layer is 60-80 mu m, and the surface paint layer is fluorocarbon finish paint.
5. The corrosion prevention bolt assembly for a bridge according to claim 1, wherein: the sealing adhesive layer is a two-component crosslinking type sealing adhesive or polysulfide sealing adhesive.
6. The corrosion prevention bolt assembly for a bridge according to claim 1, wherein: the protective cover is made of ASA plastic or PVDF plastic.
CN202022517911.5U 2019-12-30 2020-11-04 Anti-corrosion bolt assembly for bridge Active CN214390965U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2019224227759 2019-12-30
CN201922422775 2019-12-30

Publications (1)

Publication Number Publication Date
CN214390965U true CN214390965U (en) 2021-10-15

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Application Number Title Priority Date Filing Date
CN202022517911.5U Active CN214390965U (en) 2019-12-30 2020-11-04 Anti-corrosion bolt assembly for bridge

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CN (1) CN214390965U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112122084A (en) * 2019-12-30 2020-12-25 中航百慕新材料技术工程股份有限公司 Protection method of bolt for bridge and anti-corrosion bolt assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112122084A (en) * 2019-12-30 2020-12-25 中航百慕新材料技术工程股份有限公司 Protection method of bolt for bridge and anti-corrosion bolt assembly

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