Straight-through joint convenient to weld and connect

Abstract

The invention provides a straight-through joint convenient to weld and connect. The straight-through joint comprises a welding body, a connecting pipe, a sealing sleeve, a spring piece and a sealing ring; a plurality of gradually-decreasing steps are arranged on the inner wall of the left end of the welding body, a plurality of convex strips are arranged on the steps, a protective groove is formedbetween every two adjacent convex strips, and protective strips are arranged on the protective grooves; a third thread is arranged on the right side of the second thread, a fourth thread matched withthe third thread is arranged on the inner wall of the sealing sleeve, and a fifth thread is arranged on the right side of the third thread; and a connecting strip is arranged at the left end of the fifth thread, and a check body is arranged on the inner wall of the left end of the connecting pipe. According to the straight-through joint convenient to weld and connect, by arranging the plurality of steps, welding of pipelines with different sizes can be met, and the welding performance is good; and the connecting pipe can be connected to the hard pipeline and also can be connected to the softpipeline, so that the connection adaptability is improved, and the connection sealing performance is good.

Description

【Technical field】 [0001] The invention relates to the technical field of connectors, in particular to a straight-through joint that facilitates stable welding connections. 【Background technique】 [0002] Applicable media for welded straight pipe joints: oil, water, gas and other non-corrosive or corrosive media. For welded sealed pipe joints, the specification requirements for matching steel pipes are relatively flexible, and the two pipes can be connected after welding with the pipe, so it is widely used in many fields, and it is also suitable for hydraulic transmissions such as various mechanical engineering and machine tool equipment. pipeline. [0003] However, in many cases, the equipment will continue to vibrate when it is working. At the same time, because the welding surface on the straight pipe joint is small or the welding surface is flat, the welding is not firm. In addition to the vibration of the equipment, the straight pipe joint is prone to appear. The crack...

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Problems solved by technology

[0003] However, in many cases, the equipment will continue to vibrate when it is working. At the same time, because the welding surface on the straight pipe joint is small or the welding surface is flat, the welding is not firm. In addition to the vibration of the equipment, the straight pipe joint is prone to appear. The crack between the welded body and the pipe will cause the seal of the pipe joint to be damaged, and the liquid medium in the pipe will flow out, causing pollution or waste

[0004] Moreover, the existing straight-through joints can only meet the connection of a single function, and the scope of application is limited, and the welded body on the joint and the connecting pipe cannot be disassembled. When a certain part is damaged, it needs to be replaced as a whole, and the replacement cost is high

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