Double-channel metal pipeline joint for cold and hot water mixed flow based on hot expansion and cold rotation

Abstract

The invention discloses a double-channel metal pipeline joint for cold and hot water mixed flow based on hot expansion and cold rotation. The double-channel metal pipeline joint structurally comprisesan intermediate metal pipe, a hot water inlet pipe, a hot water connecting head, a mixed flow port, a cold water inlet pipe, a cold water connecting head, a threaded water outlet port, a reinforcingnut and a hot expansion and cold rotation tightening device. According to the double-channel metal pipeline joint, through the arrangement of a cold water flow pushing mechanism, rubber rings can be pushed by the pushing force of water flow when cold water is discharged, so that the rubber rings are expanded to be closely attached to water outlet port gaps, and water leakage is prevented when thecold water is discharged; and through a heat expansion tightening ring, water outlet port gaps can be compensated by utilizing the heat expansion characteristic of rubber when hot water is discharged,water leakage is prevented when hot water is discharged, the problem that the rubber rings in joints can only tighten hot water or cold water discharging gaps when the hot water or cold water is discharged because the size is changed as the temperature changes is solved, and the purpose that the tightness of the joints is not changed as the temperature changes is achieved.

Description

technical field [0001] The invention relates to the field of pipe joints, more precisely, it is a dual-flow metal pipe joint based on thermal expansion and cold rotation for mixed flow of cold and hot water. Background technique [0002] Dual-channel metal pipe joints are mainly used for the joints of mixed flow of cold water and hot water. Rubber rings are often used to tightly handle the connection gaps at the joints. However, the existing dual-channel metal pipe joints have the following defects: [0003] 1. The temperature at the water outlet often alternates between hot and cold. If the thickness of the rubber ring added to the joint gap just compensates for the gap when the cold water is discharged, then when the hot water is discharged, it will expand due to heat, push the gap, and make the gap When the cold water comes out again, it will leak water due to the large gap, or the rubber ring will lose its deformation ability due to excessive extrusion, and completely lo...

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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a dual-channel metal pipe joint for mixed flow of hot and cold water based on thermal expansion and cold rotation, so as to solve the problem of the temperature at the outlet of the dual-channel metal pipe joint in the prior art. It often alternates between hot and cold. If the thickness of the rubber ring added to the gap of the interface just compensates for the gap when the cold water comes out, then when the hot water comes out, it will expand due to heat, push the gap, and make the gap bigger. When the cold water comes out again When the gap is large, it will leak water, or the rubber ring will lose its deformation ability due to over-extrusion, and completely lose its tightness; and if the thickness of the rubber ring added to the gap of the interface just compensates for the gap when hot water comes out, it will not be able to Defects that play a tight role in cold water

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