JPH0272890U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the first embodiment of the present invention, Fig. 2 is a schematic diagram showing the first tube body, Fig. 3 is a schematic diagram showing the coupling, and Fig. 4 is a schematic diagram showing the parallel thread. , FIG. 5 is a schematic diagram showing a second embodiment of the present invention, FIG. 6 is a schematic diagram showing a conventional example, and FIG. 7 is a schematic diagram showing a tapered screw. 10...pipe joint, 20...coupling, 21
... Parallel female thread, 22 ... Sealing contact surface, 31 ...
First tube body, 32...Second tube body, 33,3
4...Parallel male thread, 33A, 34A...Parallel male thread end part, 35...Outer diameter bulge part, 36, 37, 3
8...Sealing contact surface, 39...Outer diameter bulge, 40...
... Pipe joint, 41 ... Seal member, 101, 102
, 103... Seal portion.

Claims (1)

[Claims for Utility Model Registration] (1) From both ends of the parallel female threads provided continuously over substantially the entire length of the coupling ring, thread the parallel male threads provided at each end of the first and second tube bodies. The pipe joint is formed by providing an outer diameter bulge near the end of the parallel male thread of the first pipe body, and the outer diameter bulge that abuts one end surface of the coupling ring. The end surfaces of the first tube body are used as sealing contact surfaces, and the end surfaces of both tube bodies that abut each other in the coupling are used as sealing contact surfaces, and the parallel female thread of the coupling is screwed into the parallel male thread of the first tube body. Put it on,
A first sealing portion is formed by the close contact between the sealing contact surface provided on the outer diameter bulge of the first tube body and the sealing contact surface provided on the end surface of the coupling, and a second seal is formed on the parallel female thread of the coupling. A pipe joint characterized in that the parallel male threads of the pipe bodies are screwed together to form a second seal portion by the close contact between the sealing contact surfaces provided on the end faces of both pipe bodies. (2) A pipe joint formed by threading parallel male threads provided at each end of the first and second pipe bodies from both ends of parallel female threads provided continuously over approximately the entire length of the coupling ring. An outer diameter bulge is provided near the end of the parallel male thread of the first tube body, and one end face of the coupling ring and the end face of the outer diameter bulge with which this end face abuts are formed into a sealing contact surface. and each of the end surfaces of the two tube bodies that abut each other in the coupling ring is used as a sealing contact surface, and further, an outer diameter bulge is provided near the end of the parallel male thread of the second tube body,
The parallel female thread of the coupling ring is screwed onto the parallel male thread of the first tube body, so that the sealing contact surface provided on the outer diameter bulge of the first tube body and the sealing contact surface provided on the end surface of the coupling ring are connected. The first sealing portion is formed by close contact, and the parallel male thread of the second tube body is screwed into the parallel female screw of the coupling ring, and the sealing contact surfaces provided on each of the end surfaces of both tube bodies are tightly attached. Second
A pipe joint characterized in that a sealing portion is formed, and a sealing member is further interposed between the end face of the outer diameter bulging portion of the second pipe body and the other end face of the coupling ring.