Delay water outlet valve for pipe-in-pipe and hot water discharge system thereof

Abstract

The invention belongs to the technical field of domestic water, and particularly relates to a delay water outlet valve for a pipe-in-pipe and a hot water discharge system thereof. The delay water outlet valve for the pipe-in-pipe comprises a water heater, a liquid inlet valve and a pipe-in-pipe pipeline, the delay water outlet valve is arranged at the tail end of a branch of a pipe-in-pipe pipeline through a pipe-in-pipe joint, the delay water outlet valve comprises a valve body, the valve body is provided with a liquid outlet end and a pipe-in-pipe connecting end, the pipe-in-pipe connectingend is provided with an inner flow passage and an outer flow passage, and the liquid outlet end communicates with the inner flow passage and the outer flow passage through an inner cavity of the valvebody; the inner side of the pipe-in-pipe connecting end is provided with a delay sealing part separating the inner flow passage and the outer flow passage, the inner cavity of the valve body is provided with a damping piston and a first reset part providing elastic force, the damping piston is arranged on the outer side wall or the inner side wall of the delay sealing part, and the outer flow passage or the inner flow passage is sealed; and when an internal medium pushes the damping piston to separate the delay sealing part, the delay liquid outlet of the flow passage where the damping pistonis located is realized. The delay water outlet valve for the pipe-in-pipe and the hot water discharge system thereof have the advantages of small cold water emptying amount, high hot water outlet speed and the like.

Description

Technical field [0001] The invention belongs to the technical field of domestic water, and particularly refers to a delayed water outlet valve used in a pipe-in-pipe and its hot water discharge system. Background technique [0002] The pipe-in-pipe pipe is composed of pipe-in-pipe and pipe-in-pipe joints, both of which are composed of a pipe-in-pipe inner tube forming an inner flow passage and a pipe-in-pipe outer pipe forming an outer flow passage. It has the advantages of convenient installation and fast liquid discharge speed. advantage. [0003] The utility model patent with the application number CN201820054377.9 discloses a hot water circulation system, which includes a water heater, a circulation pump, a non-return type starting valve, a hot water pipe composed of a hot water pipe and a pipe joint, And the tail valve for connecting external equipment. The liquid inlet end of the circulating pump is connected to the output end of the water heater, and the output end is conn...

AI Technical Summary

Problems solved by technology

[0007] 1. This structure is only suitable for single-channel delayed discharge, not suitable for application in tube-in-tube;

[0008] 2. The liquid outlet hole of this structure is set on the piston, which is only suitable for a small amount of liquid, not suitable for application in water pipes;

[0009] 3. There is a certain pressure in the hydraulic chamber, regardless of the low-pressure sealing state or the high-pressure opening state, the spring will be acted on by the piston, and the spring is always in working state, which affects the service life of the spring

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