Patent EA-001479-B1 (EA)
Title: Polymer duct and connection members for assembing the same
IPC: F16L47/03
Filed: 1998-12-22
Abstract: 1. A polymer duct, preferably metal plastic, comprising a plurality of reinforced polymer tubes of the predetermined length, rigidly connected by connection members, stop valves, pumps, the polymer tubes comprise reinforcements in the form of a three-dimensional reinforcing frame which is arranged in the monolithic polymer and a connection member is designed as a fitting and constitutes a body made of monolithic polymer block with cylindrical cavities for the ends of tubes to be connected, inside the block a reinforcing frame is housed, heating members in the shape of electro-conductive spirals are further provided on the side of the connection-member inner surfaces, dividing said inner surface to a heating area and a cold area, characterized in that said reinforcing frame of a connection member is perforated comprises a ring as well as a plurality of longitudinal members which co-operate with said ring and are arranged thereon so as to be capable of radial displacement, the width of the ring is commensurate with that of the cold area. 2. The polymer duct of claim 1, characterized in that said three-dimensional reinforcing frame of a tube is formed by two layers of perforated strips with a gap between them and arranged in the gap a twisted long-length member. 3. The polymer duct of claims 1 and 2, characterized in that said connection member is designed in the form of a sleeve, wherein the width of said reinforcing frame ring is not less than the cold area width, formed by a gap between the ends of said electro-conductive spirals. 4. The polymer duct of claims 1 and 2, characterized in that said connection member is designed in the form of a cross piece or a T-joint or a branching, the inner surface of the cavity is provided with a stop element for fixing the position of a mating tube end. 5. The polymer duct of claim 4, characterized in that the width of said reinforcing frame ring is not less than the cold area width, formed by a gap between the stop element and the end of a heating element. 6. The polymer duct of claims 3 and 4, characterized in that said longitudinal members of the reinforcing frame are arranged respective to each other with a gap. 7. The polymer duct of claims 3 and 4, characterized in that said longitudinal members of the perforated reinforcing frame cooperate with each other by lateral surfaces. 8. The polymer duct of claims 3 and 4, characterized in that said longitudinal members of the reinforcing frame are flexibly connected to the perforated ring by rivets. 9. The polymer duct of claims 3 and 4, characterized in that said longitudinal members of the reinforcing frame are flexibly connected to the perforated ring by placing T-shaped bent ends of the longitudinal members into T-shaped slots of the ring. 10. A connection member of a duct, preferably fitting, comprising a body made of monolithic block having cylindrical cavities for receiving tube's ends to be connected, inside the block a reinforcing frame is housed, heating members in the shape of electro-conductive spirals are further provided on the side of the connection-member inner surfaces, dividing said inner surface to a heating area and a cold area, characterized in that said reinforcing frame of a connection member is perforated comprises a ring as well as a plurality of longitudinal members which co-operate with said ring and are arranged thereon so as to be capable of radial displacement, the width of the ring is commensurate with that of the cold area. 11. A connection member of a duct of claim 10, characterized in that said connection member is designed in the form of a sleeve, wherein the width of said reinforcing frame ring is not less than the cold area width, formed by a gap between the ends of said electro-conductive spirals. 12. A connection member of a duct of claim 10, characterized in that said connection member is designed in the form of a cross piece or a T-joint or a branching, the inner surface of the cavity is provided with a stop element for fixing the position of a mating tube end. 13. A connection member of a duct of claim 12, characterized in that the width of said reinforcing frame ring is not less than the cold area width, formed by a gap between the stop element and the end of a heating element. 14. A connection member of a duct of claims 10, 11, 12, 13, characterized in that said longitudinal members of the reinforcing frame are arranged respective to each other with a gap. 15. A connection member of a duct of claims 10, 11, 12, 13, characterized in that said longitudinal members of the reinforcing frame cooperate with each other by lateral surfaces. 16. A connection member of a duct of claims 10, 11, 12, 13, 14, 15, characterized in that said longitudinal members of the reinforcing frame are flexibly connected to the perforated ring by rivets. 17. A connection member of a duct of claims 10, 11, 12, 13, 14, 15, characterized in that said longitudinal members of the reinforcing frame are flexibly connected to the perforated ring by placing T-shaped bent ends of the longitudinal members into T-shaped slots of the ring.