Frost crack resisting drainage pipeline and manufacturing method thereof

Abstract

The invention provides a frost crack resisting drainage pipeline. The drainage pipeline is of a double-layer pipeline structure and comprises an outer pipeline body and an inner pipeline body which are tightly attached to each other and form a concentric pipeline structure. The outer pipeline body is made of metal material. The inner pipeline body is made of microcellular plastics. The invention further provides a method for manufacturing the frost crack resisting drainage pipeline. The method comprises the steps that the inner microcellular plastic pipeline body is located and punched, and a hole corresponds to a drain hole in a drain valve in position; the microcellular plastic pipeline body is placed in the metal pipeline body and made to be tightly attached to the inner wall of the metal pipeline body; and the double pipeline bodies which are tightly attached to each other are bent to form the frost crack resisting drainage pipeline. The frost crack resisting drainage pipeline is easy to assemble, manufacture and operate and can be effectively protected against frost cracks, and the safety of a water pipeline system of a water heater is guaranteed.

Description

technical field [0001] The invention relates to an anti-freeze crack drainage pipe and a manufacturing method thereof, in particular to a water heater drainage pipe, and belongs to the technical field of water heaters. Background technique [0002] The raw materials of existing drainage pipes for water heaters usually use metal materials such as steel pipes, aluminum plates, copper materials and aluminum foil plates, and their basic structure is a hollow pipe with a certain wall thickness. However, for drainage pipes made of metal materials, their deformation resistance is poor. When the ambient temperature is lower than 0°C, the water in the drainage pipes freezes into ice, and the volume expands, causing a certain pressure on the inner wall of the drainage pipes. When the pressure reaches the tensile strength of the drainage pipe guide material, the material will be destroyed, the drainage pipe will be frozen and cracked, resulting in the failure of the drainage pipe, the ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an anti-freezing crack drainage pipe to solve the problem that the existing drainage pipe is easy to be frozen and cracked.

Images