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A kind of lining material for flexible pipe and flexible pipe thereof

A technology for lining and pipe, applied in the direction of pipes/pipe joints/fittings, hoses, pipes, etc., it can solve the problems of pressure change between rings, damage to the whole pipe, lack of reinforcement, etc., and improve the anti-seepage performance. , the effect of prolonging the service life and reducing the pressure loss

Active Publication Date: 2017-12-12
河北永烁能源工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the anti-permeability of the lining layer does not meet the standard, the transport fluid will penetrate into the middle reinforcement layer, which will cause the following three failures: (1) If the reinforcement layer is made of metal material, the metal material will corrode, and the acidic fluid will accelerate the metal Corrosion; (2) If the reinforcement layer is made of fiber material, the fiber material may be hydrolyzed, and the reinforcing effect will not be achieved; (3) The inter-ring pressure between the inner and outer sheaths changes, increasing the pressure bearing capacity of the inner and outer sheaths ability, resulting in damage to the entire pipe

Method used

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  • A kind of lining material for flexible pipe and flexible pipe thereof
  • A kind of lining material for flexible pipe and flexible pipe thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 100 parts by weight of HDPE resin, 0.3 parts by weight of oleic acid amide, 0.3 parts by weight of calcium stearate, 25 parts by weight of dehydrated phlogopite sheets, and 7 parts by weight of maleic anhydride grafted HDPE are put into a twin-screw extruder and extruded granulation to obtain the first polymer material;

[0046] By weight, 100 parts by weight of the first polymer material, 0.5 parts by weight of sorbitol, 8 parts by weight of thermoplastic polyurethane elastomer, and 0.4 parts by weight of polyethylene wax are put into a twin-screw extruder for extrusion granulation, and the lining material is The lining material is blended, extruded and cooled by a single-screw extruder to obtain an inner core tube.

[0047] The inner tube core is extruded by the first extruder. After water cooling and sizing, the aramid reinforced composite wire is wound on the HDPE inner core tube 1 in a left-handed and right-handed manner from the left and right sides, and the windi...

Embodiment 2

[0049] 100 parts by weight of HDPE resin, 0.3 parts by weight of oleic acid amide, 0.2 parts by weight of zinc stearate, 0.3 parts by weight of 1,2-cyclohexanedicarboxylic acid, 25 parts by weight of dehydrated phlogopite, maleic anhydride 8 parts by weight of grafted HDPE are put into a twin-screw extruder to extrude and granulate to obtain the first polymer material;

[0050] Put 100 parts by weight of the first polymer material, 0.3 parts by weight of sorbitol, 8 parts by weight of thermoplastic polyurethane elastomer, and 0.5 parts by weight of polyethylene wax into a twin-screw extruder for extrusion and granulation to obtain a lining material, and then pass through a single The screw extruder blends, extrudes, and cools into an inner core tube.

[0051] After the inner tube core extruded by the first extruder is water-cooled and sized, the aramid-reinforced composite wire is wound on the HDPE inner core tube 1 in a left-handed and right-handed manner from the left and ri...

Embodiment 3

[0053] data detection

[0054] According to the National Standard GBT 15560-1995 of the People's Republic of China "Plastic Pipe Hydraulic Instantaneous Burst and Pressure Test Method for Fluid Transport" carry out the pressure test and the burst test of Comparative Example 1 and Examples 1 to 2 flexible pipeline transport sewage, the results show : the flexible pipe prepared in Example 1, compared with the flexible pipe prepared in Comparative Example 1, its pressure loss in 24 hours was reduced by 10%, and the flexible pipe prepared in Example 2 was prepared in comparison with Comparative Example 1 Compared with flexible pipes, its pressure loss in 24 hours is reduced by 15%. It can be known from the test results that the sealing performance of the flexible pipe of the present invention is relatively good. And the burst pressure value of embodiment 2 is 30MPa; the burst pressure value of embodiment 3 is 32MPa; all reach the numerical value required by the standard, show to ...

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Abstract

The invention provides an inner lining material for a flexible pipe and the flexible pipe. The inner lining material provided by the invention is formed by blending first polymer materials, second polymer materials and auxiliary agents, wherein the first polymer materials are polymer materials using high-density polyethylene as base bodies; the second polymer materials are thermoplastic elastomers. The two kinds of polymer materials and the auxiliary agents are blended, so that the anti-seepage performance of the flexible pipe prepared from the obtained inner lining materials is improved; the flexible pipe can be used for water transmission and can also be used for oil transmission and gas transmission; in addition, the blasting pressure value reaches the standard requirement; further, the service life of the flexible pipe provided by the invention is prolonged.

Description

technical field [0001] The invention relates to the technical field of pipes, in particular to an inner lining material for flexible pipes and a flexible pipe thereof. Background technique [0002] The basic structure of the composite flexible pipe mainly includes a polymer inner lining layer, a middle reinforcement layer and a polymer outer sheath layer. Among them, the main function of the inner liner is to prevent the chemical liquid from entering the reinforcement layer, that is, to prevent the flexible pipe from being corroded by chemicals. Therefore, the material of the inner liner plays a key role in the quality of the hose. At present, the lining material of the flexible pipe lining is generally high-density polyethylene (HDPE). HDPE has high temperature resistance, oil resistance, steam permeability resistance and environmental stress cracking resistance. In addition, its electrical insulation and Good impact resistance and cold resistance. [0003] Although PE ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L51/06C08L75/04C08K13/04C08K5/20C08K5/098C08K5/092C08K3/34F16L11/04
CPCC08L23/06C08L2203/18C08L2205/025C08L2205/035C08L2207/062F16L11/04C08L51/06C08L75/04C08K13/04C08K5/20C08K5/098C08K3/346C08K5/092
Inventor 孟庆义赵亭李建军崔晓轩
Owner 河北永烁能源工程科技有限公司