PVC (polyvinyl chloride) dual-resistant flexible pipe

A polyvinyl chloride, soft polyvinyl chloride technology, applied in the direction of hoses, pipes, pipes/pipe joints/pipe fittings, etc., can solve the problem of separation of the skeleton layer and the plastic layer, and achieve creep and thermal expansion and contraction coefficients Small size, good compatibility, enhanced antistatic and flame retardant properties

Inactive Publication Date: 2011-04-27
SHANXI QINGKE HENGAN MINING NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The problem to be solved by the present invention is to provide a polyvinyl chloride double-resistant hose to overcome the defect that the skeleton layer is separated from the plastic layer under the action of aging and temperature change in the prior art

Method used

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  • PVC (polyvinyl chloride) dual-resistant flexible pipe
  • PVC (polyvinyl chloride) dual-resistant flexible pipe
  • PVC (polyvinyl chloride) dual-resistant flexible pipe

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Embodiment Construction

[0019] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] The structure of a polyvinyl chloride double-resistant hose of the present invention is as follows: image 3 As shown, the hose includes soft PVC and a skeleton layer embedded in the soft PVC, the skeleton layer is composed of unplasticized PVC hard strips, and adjacent unplasticized PVC hard strips are formed by soft PVC strips. quality PVC separated. The soft PVC contains carbon black, graphite or an organic antistatic agent, and an organic flame retardant or an inorganic flame retardant.

[0021] This embodiment uses unplasticized PVC hard strips as the skeleton layer, fully utilizes the high tensile strength and high elastic modulus of hard PVC, and can be use...

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Abstract

The invention discloses a PVC (polyvinyl chloride) flexible pipe for drawing and releasing gas in a coal mine underground, wherein the flexible pipe comprises soft PVC and a casing ply embedded in the soft PVC, and the casing ply is composed of a non-plasticization PVC hard strip. Because the non-plasticization PVC hard strip is adopted as the casing ply for the PVC flexible pipe provided by the invention, the hard strip and the soft PVC belong to homogeneous material, the consistency of the hard strip and the soft PVC is excellent, the difference of coefficients of creepage and heat expansion and cold contraction is minimum, and separation of the hard strip and the soft PVC does not happen under the aging effect and the temperature fluctuation effect; and in addition, an anti-static agent and flame retardant are added in the soft PVC, the antistatic property and the flame retardant property of the flexible pipe are enhanced, and the combustion resistant and antistatic flexible pipe standard used at the coal mine underground is reached.

Description

technical field [0001] The invention relates to the technical field of rubber and plastic hoses, in particular to a polyvinyl chloride double-resistant hose. Background technique [0002] Hose refers to a pipe with a small bending radius to meet the requirements of convenient installation and laying under environmental conditions that require a small bending radius. In order to meet the needs of a smaller bending radius, the currently used hoses are made of soft materials, that is, materials with a lower elastic modulus, such as PE hoses, PVC (Poly Vinyle Chloride, polyvinyl chloride) hoses, etc. The structure of a hose made of a single soft material such as figure 1 As shown, 11 of them are soft materials. The hose made of this single soft material has low tensile strength and elastic modulus, and cannot meet the conditions of use under strong internal and external pressure. As a result, reinforced hoses are produced, which is to embed other high-strength materials of va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/08F16L11/12
Inventor 张英利李文贤
Owner SHANXI QINGKE HENGAN MINING NEW MATERIAL
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