A male head of a pipe joint and a pipe joint

Abstract

The invention provides a male end of a pipe joint. The male end is internally provided with a flowing channel. The male end includes a hollow tubular base body and a sealing body. The base body includes a tail end and a connection segment in sequence in the axial direction, wherein the tail end is connected with a pipe, and the connection segment is used for connecting the sealing body with a female end of the pipe joint. The inner surface of the connection segment of the base body is provided with an internal thread for connection with the sealing body, the portion, near the connection end face, of the outer surface is provided with an external thread for connection with the female end, the sealing body sequentially includes the connection segment and a sealing surface in the axial direction, the outer surface of the connection segment of the sealing body is provided with an external thread for connection with the internal thread of the base body, and the circumferential-direction connection end face is arranged at the junction of the connection segment of the sealing body and the sealing surface. When the base body and the seal body are tightened, the connection end face of thesealing body is close to the connection end face of the base body. The invention further provides the pipe joint including the male end.

Description

technical field [0001] The invention relates to the field of aero-engine pipe connection, in particular to a male head of a pipe joint and a pipe joint. Background technique [0002] The pipe joint assembly of the hydraulic pipeline in the aircraft engine is a common standard part and an important part of the pipeline system. The pipe joint assembly is formed by connecting the pipe joint (male) and the pipe joint (female) to ensure the sealing and reliable delivery of the fluid medium under certain environmental conditions such as pressure, temperature, flow and vibration. [0003] A typical fitting assembly such as figure 1 As shown, the male head 101 is an important part of the pipe joint assembly. According to the structural characteristics, the existing male head can be divided into flow channel 102, tail end 103, connecting thread 104, hexagonal 105, sealing surface 106 and other parts, and the female head 107 has a positioning end surface 108 , and the inner surface ...

AI Technical Summary

Problems solved by technology

The male head is composed of multiple structural features. Both the tail end and the sealing surface require high dimensional accuracy, shape and position accuracy, and roughness. The complex shape of the parts leads to many processing procedures and multiple clamping times during processing, which leads to the processing of parts. High difficulty

[0011] (2) Joint scrapping caused by welding failure to meet design requirements

The welding quality requirements of the tail end of the male head and the pipe are relatively high. Due to the processing technology, processing equipment and processing personnel, the processing quality often cannot meet the design requirements. The poor welding quality of the tail end will cause the entire part to be scrapped, even if the sealing surface has been inspected and meets the design requirements. requirements, must also be scrapped together, resulting in a great waste

[0012] (3) The joint scrapping caused by the failure of the sealing surface to meet the requirements

The damage to the sealing surface of the male head is the biggest reason for the scrapping of parts. There are three main reasons. One is that the processing of the sealing surface is not qualified and the parts are scrapped. Parts are scrapped. The third is that the thermal stress of the welding at the tail end of the male head deforms the sealing surface, resulting in unqualified shape and position accuracy, resulting in the scrapping of the parts. No matter what the reason is, when the sealing surface cannot meet the design requirements, even if the tail end welding has met the design requirements Requirements, the entire joint must also be scrapped together, resulting in a great waste

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