Pipe joint used for being connected with pipe

Abstract

The invention relates to a pipe joint used for being connected with a pipe. The pipe joint comprises a joint main body, an inner ring and a nut, the joint main body is provided with a main body cylinder part, an outer cylinder part, an inner cylinder part and a groove part defined by the main body cylinder part, the outer cylinder part and the inner cylinder part, and the inner ring is provided with an insertion part, an abutting part located on the radial inner side of the insertion part, an embedding part, a connecting part, a protruding part and a fluid channel located in the center. The protruding part and the connecting part are pressed into one end of the pipe so as to clamp the end of the pipe between the protruding part and the outer cylinder part, the insertion part is inserted into the groove part, and the nut and the inner ring together fasten the pipe to the joint main body. The inner wall of the outer cylinder part forms a first groove wall of the groove part, the outer diameter of the insertion part is not smaller than the inner diameter thereof, the outer wall of the inner cylinder part forms a second groove wall thereof, and the inner diameter of the insertion part is larger than the outer diameter thereof. A conical abutting face is formed on the outer wall of the abutting part, a conical matching face is formed on the inner wall of the tail end of the inner cylinder part, the included angle between the conical abutting face and the axial direction is smaller than the included angle between the conical matching face and the axial direction, and the abutting part extrudes the tail end of the inner cylinder part outwards in the radial direction.

Description

technical field [0001] The invention relates to the technical field of fluid delivery, in particular to a pipe joint used for connecting with pipes. Background technique [0002] Such as figure 1 and Figure 1A As shown, Chinese patent CN106461130B discloses a pipe joint 100 comprising a joint body 1 , an inner ring 2 and a fastener 3 . The joint main body 1 includes a main body cylinder part 10, an outer cylinder part 11 and an inner cylinder part 12, and is surrounded by the main body cylinder part 10, the outer cylinder part 11 and the inner cylinder part 12 to form a groove part 13, and the groove part 13 has a The opening on one side of the direction; the inner ring 2 has a cylindrical fitting part, a cylindrical connecting part and a cylindrical insertion part 20. When installing, one end of the pipe 4 is placed on the outer periphery of the connecting part, and the insertion part 20 is inserted The groove portion 13 and the fastener 3 fasten the pipe 4 to the joint...

AI Technical Summary

Problems solved by technology

But, there can be following problem in such way: (1) inserting part 20 is not easy to insert groove part 13, because, in the process that inserting part 20 is inserted in the groove part 13, the inner wall of inserting part 20 and the outer wall all contact with the groove part 13. The two groove walls form extrusion and friction effects, and when installing, first insert the inner ring 2 into one end of the pipe 4, and then tighten the inner ring 2 and the pipe 4 to the joint body 1 through the nut 3, and also That is to say, the nut 3 does not directly push the inner ring 2, and the two are separated by the pipe 4. Therefore, the actual pushing force on the inner ring 2 is greatly reduced. Therefore, the tightening operation to complete the installation of the nut 3 is very fast. strenuous

(2) During the entire installation process, the inner ring 2 moves toward the joint body 1 and the insertion part 20 is inserted into the groove part 13, the inner wall and outer wall of the insertion part 20 form a strong contact with the two groove walls of the groove part 13. The friction will also cause particles to fall off, especially the friction between the inner wall of the insertion part 20 and the inner groove wall, the particles formed between the two will fall into the fluid channel 14 inside the inner cylinder part, and then pollute the high-purity fluid transported , it is found through testing that after passing through the pipe joint 100, the number of plastic particles in every 0.1L of fluid increases by at least 1 times

In the process of conveying high-temperature fluid, since the inner cylinder part 12 directly contacts the high-temperature fluid and expands when heated, its radial inward deformation range toward the fluid channel 14 is further increased, thereby creating a shape of the fluid channel corresponding to the deformed part of the inner cylinder part 12 When the fluid flows through the deformed part of the inner cylinder part 12, it will be disturbed to a certain extent. When the fluid velocity is high, turbulent flow may also be formed, resulting in the formation of air bubbles

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