Insulation pipe fitting elbow containing high-density polyethylene reinforced bracket and manufacturing method

Abstract

The invention relates to a thermal-insulation pipe elbow with a high-density polyethylene reinforced bracket and a manufacturing method for the thermal-insulation pipe elbow. An original polyurethane plastic foamed thermal-insulation pipe is produced by a wood or plastic upholder which is tied up by metal wires in series connected. In a process of covering a pipe with another pipe, a wood block and a plastic block have breaking and moving phenomena. The thermal-insulation pipe elbow with the high-density polyethylene reinforced bracket consists of an below working pipe (3), wherein the outer side of the below working pipe is provided with the high-density polyethylene reinforced bracket (4) in a sleeved mode; the outer side of the high-density polyethylene reinforced bracket is provided with an outer protective tube (1); a hard polyurethane layer (2) is arranged between the elbow working pipe and the outer protective tube; and a vertical section of the elbow working pipe is in transition through a circular arc. The invention is applied to the thermal-insulation pipe elbow with the high-density polyethylene reinforced bracket and the manufacturing method for the thermal-insulation pipe elbow.

Description

Technical field: [0001] The invention relates to an elbow of a thermal insulation pipe fitting containing a high-density polyethylene reinforced bracket and a manufacturing method thereof. Background technique: [0002] The original production of polyurethane plastic foam insulation pipe fittings uses wooden or plastic supports, which are bound in series by metal wires. In the pipe-in-pipe process, the supports that bind wood and plastic blocks are rigidly bound on the outer wall of the working pipe by metal wires. During the process of inserting the working pipe into the high-density polyethylene outer protective tube, due to the friction of the outer protective , The wood and plastic blocks will break and move, resulting in no support in the middle and end of the pipe fittings, so that the space between the outer protective pipe and the working pipe fittings cannot be uniform, and polyurethane insulation will appear uneven after foaming. Invention content: [0003] The ...

AI Technical Summary

Problems solved by technology

In the pipe-in-pipe process, the supports that bind wood and plastic blocks are rigidly bound on the outer wall of the working pipe by metal wires. During the process of inserting the working pipe into the high-density polyethylene outer protective tube, due to the friction of the outer , wood and plastic blocks will break and move, resulting in no support in the middle and end of the pipe fittings, so that the space between the outer protective pipe and the working pipe fittings cannot be uniform, and polyurethane insulation will appear uneven after foaming

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