Drinking water pipe sealing expansion joint and sealing expansion drinking water pipe

Abstract

The invention provides a sealing expansion joint of water dispensing pipes. Outer sides of the two water dispensing pipes are sleeved with a connecting sleeve, a pipe-like sealing part is arranged at the back end of the connecting sleeve, a V-shaped sealing ring is mounted in the sealing part of the connecting sleeve, the opening of the V-shaped sealing ring aligns to the front side of the connecting sleeve, an inserting part of an end cover extends into the sealing part of the connecting sleeve and is propped against the sealing ring, and a blocking part of the end cover is propped against the back end surface of the connecting sleeve. The lip of the V-shaped sealing ring is always attached to a sealed surface according to temperature change, so that sealing between the connecting sleeve and the corresponding water dispensing pipes is guaranteed. The invention further provides the sealing expansion water dispensing pipes. The connecting sleeve is arranged behind pipe bodies, the sealing part is also arranged at the back end of the connecting sleeve, the V-shaped sealing ring is mounted in the sealing part of the connecting sleeve, the opening of the V-shaped sealing ring aligns to the front side of the connecting sleeve, the inserting part of the end cover extends into the sealing part of the connecting sleeve and is propped against the sealing ring, and the blocking part of the end cover is propped against the back end surface of the connecting sleeve. The sealing expansion water dispensing pipes are not required to be assembled in two directions during usage, and time and labor are saved.

Description

technical field [0001] The invention relates to a drinking water pipe joint, in particular to a retractable drinking water pipe joint. [0002] The invention also relates to a sealed telescopic drinking water pipe. Background technique [0003] At present, a large-scale breeding factory uses a PVC drinking water pipe to supply poultry drinking water. Most of the pipes are 3 meters per root, and the total length of a water line running through the front and back of the poultry house is about 120 meters. A total of 40 identical drinking water pipes are required. The pipes are spliced ​​in several ways to complete the penetration of the entire system. Thereby ensuring water supply at one end and water flowing through the entire length range to ensure the drinking water quantity of poultry. [0004] One of the more difficult problems in drinking water systems at home and abroad is how to prevent the water pipes from expanding and contracting due to changes in ambient temperatu...

AI Technical Summary

Problems solved by technology

[0004] One of the more difficult problems in drinking water systems at home and abroad is how to prevent the pipes of more than 100 meters long PVC material from splicing, and after the environmental temperature changes cause the water pipes to expand and contract with heat and cold, resulting in waterline bending or disconnection at the expansion joint.

[0005] At home and abroad, there are currently methods to prevent thermal expansion and contraction of the water line: 1. Apply oily non-toxic lubricant to the sealing ring of the expansion joint. There are more than 30 expansion joints in the entire length of the drinking water system, and each pipe is connected to one Expansion joints, each expansion joint contains a sealing ring, and the drinking water pipe is sealed by being squeezed with the sealing ring after being inserted into the expansion joint. After volatilization and no lubricating effect, the entire drinking water system will concentrate all the shrinkage to a relatively easy-sliding expansion joint when the temperature drops, which will cause the drinking water pipe to fall off here, causing water leakage

[0006] Each drinking water pipe or every several drinking water pipes is equipped with an expansion joint. The plastic material fixing card only plays the role of connecting the drinking water pipe and the steel pipe together. There is friction between the drinking water pipe. When the friction force at the sealing ring, that is, when the lubricant at the expansion joint evaporates, when the ambient temperature drops, the drinking water pipe shrinks, and the drinking water pipe shrinks at this time and will not choose to shrink at the expansion joint. Instead, choose to slide on the fixed card. When the lubricant in the sealing ring of the entire drinking water system is mostly volatilized, the expansion and contraction of about 40 drinking water pipes will all be concentrated until the friction force of the sealing pad is smaller than that of the fixed card and the drinking water pipe. At the joint where the frictional force between them, at this time, the amount of expansion and contraction that each expansion joint cavity can withstand is only enough for the expansion and contraction of a few pipes. When the expansion and contraction of dozens of pipes are all concentrated in one expansion joint At this time, it will fall off here, causing water leakage in the drinking water system

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