Abstract: A pipe connecting device comprises a connecting body including a first tube having a stop jaw at an end thereof and a second tube coupled to the first tube by a fastener and having an opening for insertion of a pipe, wherein a wedge groove is formed in the connecting body and includes rotary corners having a L-shaped cross section and surrounding a circumference of the pipe, rotary wedges each including a rotary part and an extension part, wherein the rotary part is provided in the wedge groove, has a semicircular cross section, and rotates while in tight contact with the rotary corners, and wherein the extension part is formed integrally with the rotary part, has teeth, and contacts the pipe, an elastic member contacting the rotary wedges to transfer a rotational force to the rotary wedges, and a sealing member embedded in the connecting body.

Abstract: The invention relates to a fixing system for an insulating pipe of a dual insulating pipe type used for feeding liquefied LNG or liquid nitrogen, comprising an inner pipe through which the material for feeding passes, insulating material surrounding the inner pipe, and an outer pipe for protecting the insulating material surrounding the inner pipe. The insulating pipe fixing system for inserting and fixing an insulating pipe according to the invention is characterized in that the body of the fixing system is provided with a vacuum area for insulation. Therefore, according to the invention, it is easy to connect and disconnect pipes and this invention can be widely applied to connections of dual insulating pipes. Since the inside of the body is provided with an insulating section, the inner pipe area which is not surrounded by the insulating material can be insulated, so that overall insulation effect can be maximized.

Abstract: The present invention discloses a pipe fixing system that can provide generally uniform elasticity to a plurality of jaws movably disposed along the tapered inner peripheral surface at the inside of a body thereof, thus making a pipe fixed in a more rigid way. The pipe fixing system comprises a body 10, a plurality of jaws 20 in such a manner as to be moved toward an inlet 13 of the body 10, a jaw-coupling cylindrical plate spring member 30 mounted at the inside of the body 10 in such a manner as to be supported at the lower end thereof by the inner bottom surface of the body 10.

Abstract: The present invention discloses a pipe fixing system that can provide generally uniform elasticity to a plurality of jaws movably disposed along the tapered inner peripheral surface at the inside of a body thereof, thus making a pipe fixed in a more rigid way. The pipe fixing system comprises a body 10, a plurality of jaws 20 in such a manner as to be moved toward an inlet 13 of the body 10, a jaw-coupling cylindrical plate spring member 30 mounted at the inside of the body 10 in such a manner as to be supported at the lower end thereof by the inner bottom surface of the body 10.

Abstract: The present invention discloses a pipe structure fixing device, which can easily and rapidly fix and remove a pipe.