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Cable clamp bolt for suspension bridge and surface treatment method of cable clamp bolt for suspension bridge

A technology for suspension bridges and bolts, which is applied to special surfaces, pretreatment surfaces, and devices for coating liquids on surfaces, etc., can solve the problem that the galvanized layer of the screw is easily corroded by salt spray, cannot achieve maintenance and anti-corrosion, and the construction period of the cable bridge is long. and other problems, to achieve the effect of reducing bridge maintenance costs, simplifying bridge construction steps, and reducing bridge construction costs.

Inactive Publication Date: 2015-04-29
DEYANG TIANYUAN HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: due to the long construction period of the spiral bridge, there is still a long time from the cable tower (at this time the cable clamp has been installed on the cable) to the completion of the bridge, and the screw rod is exposed in the air, especially in the marine climate. In the environment, the galvanized layer of the screw is easily corroded by salt spray and fails
Its disadvantages are: the bluing or phosphating treatment methods are all anti-rust treatments in the factory manufacturing process, which are decorative, and the national standards do not stipulate the shelf life for bluing or phosphating
For the middle part where the bolt passes through the cable clamp hole, the coating after installation and the maintenance and anticorrosion during use will not be realized
The corrosion of this part is fatal to the loss of the clamping force of the cable clamp of the suspension bridge

Method used

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  • Cable clamp bolt for suspension bridge and surface treatment method of cable clamp bolt for suspension bridge
  • Cable clamp bolt for suspension bridge and surface treatment method of cable clamp bolt for suspension bridge
  • Cable clamp bolt for suspension bridge and surface treatment method of cable clamp bolt for suspension bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In the suspension bridge cable clip bolt in this specific embodiment, the surface of the bolt 1 has a Teflon penetration layer t with a depth of 10 μm. The surface treatment method for the cable clamp bolt 1 of the suspension bridge comprises steps:

[0036] (1) The cable clamp bolt 1 is manufactured, and the size and performance are qualified;

[0037] (2) Clean the surface of cable clamp bolt 1;

[0038] (3) Spray the coating of the corrosion-resistant layer on the surface of the cable clamp bolt 1, wherein: the angle between the spray beam of the paint sprayed by the spray gun and the surface of the cable clamp bolt 1 is 70°, the distance between the spray gun and the workpiece is 150mm, and the spraying speed is 100mm / s, there is more than 20% overlap of adjacent spraying tracks;

[0039] (4) Curing and sintering the coating to form a Teflon permeable layer t, wherein: the sintering temperature is 330° C., and the sintering time is 5 days.

[0040] (5) After coo...

Embodiment 2

[0042] In the suspension bridge cable clip bolt in this specific embodiment, the surface of the bolt 1 has a Teflon penetration layer t with a depth of 20 μm. The surface treatment method for the cable clamp bolt 1 of the suspension bridge comprises steps:

[0043] (1) The cable clamp bolt 1 is manufactured, and the size and performance are qualified;

[0044] (2) Clean the surface of cable clamp bolt 1;

[0045] (3) Spray the coating of the corrosion-resistant layer on the surface of the cable clamp bolt 1, wherein: the angle between the spray beam of the paint sprayed by the spray gun and the surface of the cable clamp bolt 1 is 90°, the distance between the spray gun and the workpiece is 200mm, and the spraying speed is 150mm / s, there is more than 20% overlap of adjacent spraying tracks;

[0046] (4) curing and sintering the coating to form a Teflon permeable layer t, wherein: the sintering temperature is 380° C., and the sintering time is 3 days.

[0047] (5) After coo...

Embodiment 3

[0049] In the suspension bridge cable clip bolt in this specific embodiment, the surface of the bolt 1 has a Teflon penetration layer t with a depth of 10 (10-20, please give a preferred value) μm. The surface treatment method for the cable clamp bolt 1 of the suspension bridge comprises steps:

[0050] (1) The cable clamp bolt 1 is manufactured, and the size and performance are qualified;

[0051] (2) Clean the surface of cable clamp bolt 1;

[0052] (3) Spray the coating of the corrosion-resistant layer on the surface of the cable clamp bolt 1, wherein: the angle between the spray beam of the paint sprayed by the spray gun and the surface of the cable clamp bolt 1 is 70°, the distance between the spray gun and the workpiece is 200mm, and the spraying speed is 150mm / s, there is more than 20% overlap of adjacent spraying tracks;

[0053] (4) Curing and sintering the coating to form a Teflon permeable layer t, wherein: the sintering temperature is 350° C., and the sintering ...

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Abstract

The invention provides a cable clamp bolt for a suspension bridge and a surface treatment method of the cable clamp bolt for the suspension bridge, wherein a corrosion resistant layer is arranged on the surface of the bolt; the corrosion resistant layer is a Teflon permeation layer with a depth of 10-20 microns. The surface treatment method of the cable clamp bolt for the suspension bridge sequentially comprises the following steps of manufacturing the cable clamp bolt, checking the size and performance of the bolt successfully, cleaning the surface of the bolt, spraying paint on the surface of the bolt, curing and sintering a coating, and cooling and post-processing the bolt. According to the cable clamp bolt for the suspension bridge and the surface treatment method of the cable clamp bolt for the suspension bridge, a layer of thinner Teflon coating is arranged on the surface of the cable clamp bolt for the suspension bridge, so that the precision of a thread pair cannot be influenced; the bolt painted with the Teflon coating has the advantages of excellent corrosion resistance, wear resistance and a lower stable coefficient of friction resistance, and cannot be corroded for 1000 hours in a salt fog resistance test. The cable clamp bolt for the suspension bridge and the surface treatment method of the cable clamp bolt for the suspension bridge have the advantages of simple structure, convenience in manufacture, stability, reliability and strong structural safety, and the climate adaptability of the cable clamp bolt is improved.

Description

technical field [0001] The invention relates to a cable clamp of a suspension bridge, in particular to a bolt of the cable clamp and a surface treatment method thereof. Background technique [0002] Suspension bridge is a systematic project that needs to use a large number of fasteners for connection. Among them, the cable clamp bolt is very special, which can connect the upper and lower halves (or left and right halves) of the cable clamp, and convert the axial force of the bolt into the clamping force of the cable clamp on the main cable. The reliability requirements of cable clamp bolts are very high. [0003] The installation period of the upper cable clamp components of the suspension bridge is relatively long, generally more than 3 months. That is to say, if the cable clamp bolts are exposed to the air for a long time, they will soon corrode and affect the connection strength. Its surface is treated with anti-corrosion treatment. The surface treatment method of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/16B05D5/00B05D3/02
CPCE01D19/16B05D3/0254B05D5/00
Inventor 唐明涂小东李鲤陈龙
Owner DEYANG TIANYUAN HEAVY IND
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