Long-acting preserving and sealing protection method

A sealing protection, long-term anti-corrosion technology, used in pipeline anti-corrosion/anti-rust protection, damage protection, pipeline protection and other directions, can solve the problems of low heat resistance, poor elasticity, easy to crack and so on

Inactive Publication Date: 2006-08-02
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, epoxy cement is not resistant to high and low temperature impact, and has poor elasticity and is easy to crack
Polysulfide sealant has good elasticity, good ozone resistance and weather resistance, excellent oil resistance, good water resistance, low moisture permeability, and small shrinkage. However, in order to adjust thixotropy during construction, a large amount of filler is added to affect adhesion...

Method used

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  • Long-acting preserving and sealing protection method
  • Long-acting preserving and sealing protection method
  • Long-acting preserving and sealing protection method

Examples

Experimental program
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Effect test

example 1

[0013] Example 1: Flange joint anti-corrosion sealing protection

[0014] figure 1 Schematic diagram of the anti-corrosion sealing double-layer protection structure of the flange joint. The outer neoprene jacket is prefabricated into a semicircular cavity structure with a thickness of 5mm. During construction, it is only necessary to fill the cavity with polysulfide sealant, close the two semicircles and lock them with a throat hoop, scrape off the excess sealant, and wait until completely After curing, remove the hose clamp. The sealing structure has double protection inside and outside, and the anti-corrosion effect is very effective. When repairing and disassembling, it is only necessary to cut the outer layer of rubber along the closing seam, scrape off the sealant in the cavity, and the neoprene jacket can be reused.

[0015] After the practical application of this long-term anti-corrosion sealing protection method, the appearance is beautiful and smooth, the construct...

example 2

[0016] Example 2: Bolt oil-resistant anti-corrosion seal application

[0017] figure 2 Schematic diagram of the anti-corrosion sealing double-layer protection structure of the bolt. The nitrile rubber jacket is designed as a cylindrical cavity structure with one end sealed, with a thickness of 3mm. The inner layer material is polyurethane sealant with excellent oil resistance and strong bonding performance. After the polyurethane sealant is injected into the cavity during construction, it is set on the bolt, scraped off the excess polyurethane, and pressed with tape. After it is completely cured, remove it. adhesive tape.

example 3

[0018] Example 3: Gas cylinder anti-corrosion sealing protection

[0019] image 3 Schematic diagram of the double-layer protective structure of the gas cylinder joint. The average thickness of the outer styrene-butadiene rubber jacket is 5mm-10mm. The semicircular cavity structure has a smooth outer surface. The diameter is 8-10mm. After filling the cavity with silicone sealant during construction, close the two semi-circular cavities and lock them with throat clamps. Scrape off the excess sealant. After it is completely cured, remove the throat clamps.

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Abstract

The long-acting preserving and sealing protection method has double-layer preserving and sealing structure adopted including an outer layer of rubber jacket and an inner layer of preserving and sealing glue to adhere the rubber jacket and the protected part integrally. The present invention is especially suitable for use in preserving and sealing protection of gas cylinder joint, pipeline, flange joint, nut and screw bolt in ships.

Description

1. Technical field [0001] The invention relates to a long-term anti-corrosion sealing protection method, which adopts a double-layer structure, is composed of a rubber jacket and a sealant, and is used for anti-corrosion sealing of pipeline connections, gas cylinder joints, nuts and bolts, etc., and belongs to the technical field of sealing. 2. Background technology [0002] There are thousands of various pipe connections (flanges) and a large number of bolts (screw caps) on the ship. Due to long-term immersion in seawater, frequent alternation of dry and wet, high and low temperature, it is easy to cause seawater oxidation and corrosion. In addition, different materials The potential corrosion of the parts is also very serious. The commonly used anti-corrosion method on ships is to use anti-rust paint, which has been proved to be unable to meet the long-term anti-corrosion requirements. There are also ships that directly coat underwater components with epoxy cement, polysu...

Claims

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Application Information

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IPC IPC(8): F16J15/00F16L58/02F17C1/10F16B41/00
Inventor 全一武周力平王庆军张俊生陈庆民
Owner NANJING UNIV
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