Device for working pipes

Abstract

A device for working pipes, in particular to carry out a belling working or operation on one end of a pipe, including a belling element configured to produce with a thrust a bell end with a substantially circular shape by means of axial advance into said end of said pipe.

1 . A device for working pipes, in particular for performing a belling working or operation on one end of a pipe protruding from the side or structure of a finned package of a heat exchanger, comprising a belling element configured to produce with a thrust a bell end with a substantially circular shape by means of axial advance into said end of said pipe which further comprises a gripping member, oblong in shape and coaxial with said belling element, said gripping member being configured to pass from a first conformation, suitable to allow the insertion of said gripping member into said pipe, to a second conformation in which it contacts, at least partly, the internal wall of said pipe, and applies a force suitable to create a friction that allows said belling element to advance inside the end of said pipe, carrying out the aforementioned working. 
     
     
         2 . The device as in  claim 1 , wherein said belling element is provided along its longitudinal development with a first channel in which said gripping member is coaxially inserted. 
     
     
         3 . The device according to  claim 1 , comprising a thrust member associated with said belling element and configured to thrust it, wherein said thrust member is provided with a second channel connected to said first channel in which said gripping member is positioned. 
     
     
         4 . The device as  claim 1 , wherein said belling element and said gripping member, move independently of each other. 
     
     
         5 . The device as in  claim 1 , wherein said gripping member comprises a first element and a second element, sliding and associated with each other thanks to the complementarity of their shape along at least their partial longitudinal development in correspondence with respective contact surfaces, said contact surfaces have a sawtooth profile whereby, as a result of the sliding of said first element on said second element, said sawtooth profile causes said first element to partly rise from said second element. 
     
     
         6 . The device as in  claim 1 , wherein said gripping member comprises a first side element, a second side element and a central element interposed between said first side element and said second side element, associated thanks to the complementarity of their shape in correspondence with respective contact surfaces and in a sliding manner and wherein said contact surfaces have a sawtooth profile, whereby as a result of the sliding of said central element said first side element and said second side element expand radially from said central element. 
     
     
         7 . The device as in  claim 6 , wherein said gripping member is provided with one or more seats each suitable to allow the housing of at least one elastic element to associate said lateral elements with said central element. 
     
     
         8 . A method of working pipes, in particular to carry out a belling working or operation on one end of a pipe protruding from the side or structure of a finned package of a heat exchanger, by means of axial advance of a belling element into said end of said pipe wherein it provides to apply, by means of a gripping member, in correspondence with the internal wall of said pipe, a force suitable to create a friction, without causing deformation, which allows the advance of said belling element inside the end of said pipe, carrying out the aforementioned working. 
     
     
         9 . The method as in  claim 8 , wherein said gripping member is configured to pass from a first conformation, suitable to allow the insertion of said gripping member into said pipe, to a second conformation in which it at least partly contacts the internal wall of said pipe applying said friction force. 
     
     
         10 . The belling machine comprising one or more devices as in  claim 1 . 
     
     
         11 . The device according to  claim 2 , comprising a thrust member associated with said belling element and configured to thrust the belling element, wherein said thrust member is provided with a second channel connected to said first channel in which said gripping member is positioned. 
     
     
         12 . The device as in  claim 2 , wherein said gripping member comprises a first element and a second element, sliding and associated with each other thanks to the complementarity of their shape along at least their partial longitudinal development in correspondence with respective contact surfaces, said contact surfaces have a sawtooth profile whereby, as a result of the sliding of said first element on said second element, said sawtooth profile causes said first element to partly rise from said second element. 
     
     
         13 . The device as in  claim 3 , wherein said gripping member comprises a first element and a second element, sliding and associated with each other thanks to the complementarity of their shape along at least their partial longitudinal development in correspondence with respective contact surfaces, said contact surfaces have a sawtooth profile whereby, as a result of the sliding of said first element on said second element, said sawtooth profile causes said first element to partly rise from said second element. 
     
     
         14 . The device as in  claim 4 , wherein said gripping member comprises a first element and a second element, sliding and associated with each other thanks to the complementarity of their shape along at least their partial longitudinal development in correspondence with respective contact surfaces, said contact surfaces have a sawtooth profile whereby, as a result of the sliding of said first element on said second element, said sawtooth profile causes said first element to partly rise from said second element. 
     
     
         15 . The device as in  claim 2 , wherein said gripping member comprises a first side element, a second side element and a central element interposed between said first side element and said second side element, associated thanks to the complementarity of their shape in correspondence with respective contact surfaces and in a sliding manner and wherein said contact surfaces have a sawtooth profile, whereby as a result of the sliding of said central element said first side element and said second side element expand radially from said central element. 
     
     
         16 . The device as in  claim 3 , wherein said gripping member comprises a first side element, a second side element and a central element interposed between said first side element and said second side element, associated thanks to the complementarity of their shape in correspondence with respective contact surfaces and in a sliding manner and wherein said contact surfaces have a sawtooth profile, whereby as a result of the sliding of said central element said first side element and said second side element expand radially from said central element. 
     
     
         17 . The device as in  claim 4 , wherein said gripping member comprises a first side element, a second side element and a central element interposed between said first side element and said second side element, associated thanks to the complementarity of their shape in correspondence with respective contact surfaces and in a sliding manner and wherein said contact surfaces have a sawtooth profile, whereby as a result of the sliding of said central element said first side element and said second side element expand radially from said central element.