pipe connection device

Abstract

The invention provides a pipeline connection device. The pipeline connection device comprises a fixing unit, wherein the inner wall of the fixing unit makes contact with the outer wall of a pipeline; when the pipeline connection device is applied to a flared pipe, the pipeline connection device further comprises a pressure valve and a seal ring, wherein one end of the pressure valve stretches into the flared pipe, and the pressure valve is provided with an air intake through hole communicated with the interior of the flared pipe; the seal ring is arranged between the inner wall of the cup-shaped pipe opening of the flared pipe and the pressure valve. The pipeline connection device is simple in structure, the pipeline can be fixed only by closing the pipeline connection device, and the pipeline connection device is very convenient to use and can improve production efficiency and save production cost; seal performance is good, the seal ring is combined with the pressure valve, the pressure valve can enable the seal ring to tightly press the inner wall of the inclined portion of the cup-shaped pipe opening of the flared pipe, and therefore changes of the sizes of the inner diameter of the pipe openings of flared pipes have no influence on the seal ring.

Description

technical field [0001] The invention relates to the field of connection equipment, in particular to a pipe connection device, which is especially suitable for inflating a flared pipe. Background technique [0002] In the production of air-conditioning pipelines and the connection inflation or sealing of flared pipes, jaw flare joints or welding caps are currently used to achieve the purpose of connection inflation or sealing. [0003] Since this type of joint achieves the sealing requirements through the interference fit between the outer diameter of the O-ring and the inner wall of the expansion port (see figure 1 ), the requirements for the size D of the flared tube and the size of the expanded tube A of the jaw card are relatively high, but in actual production and processing, the size D of the flared tube workpiece often has positive deviations, so that the sealing requirements cannot be met, resulting in working fluid Leakage makes it difficult to achieve a good sealin...

AI Technical Summary

Problems solved by technology

[0003] Since this type of joint achieves the sealing requirements through the interference fit between the outer diameter of the O-ring and the inner wall of the expansion port (see figure 1 ), the requirements for the size D of the flared tube and the size of the expanded tube A of the jaw card are relatively high, but in actual production and processing, the size D of the flared tube workpiece often has positive deviations, so that the sealing requirements cannot be met, resulting in working fluid Leakage makes it difficult to achieve a good sealing effect. In addition, the connection and fixation method between the joint and the flared pipe is connected and fixed by claws. If there is a deviation in the dimension A of the claws, the claws cannot be snapped into the connection and fixed.

[0004] At present, the largest connection specification pipe diameter of this joint can only be ￠35, and the connection of the flared pipe above ￠35 needs to be welded with a sealing cap. A large amount of solder and welding impurities seriously affect the quality of the workpiece

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