Abstract: A convenient-used securing clamp comprises a pair of clamp hands, two distance-fixing clamps, two groups of throat pipe moulds and a mould base, wherein the distance-fixing clamp is a split structure that consists of two pieces which can be closed together or released; the throat pipe moulds are set inside the distance-fixing clamps with the same split structure, so as to be closed and released along with the distance-fixing clamps; the mould base is also the split structure, with its upper part connected with the distance-fixing clamps and the lower part connected with the pair of clamp hands, so that as the pair of clamp hands releases and closes, the mould base releases and closes.

Abstract: A butt-welding and electro-fusion joining machine comprises a smoothing board, a heating board, fixed rings, a movable ring, throat pipe moulds, a manual switch, cross beams, and uprights, wherein the fixed rings and movable ring are set in turn on the cross beams of the uprights; the throat pipe moulds are set inside the fixed ring and the movable ring; the heating board is set at one end of the uprights; at one side of the heating board is fixed rings, and the other side is the smoothing board; the manual switch is set on the cross beams; the length of the cross beams is sufficient for placing pipes and fittings; the movable ring is set between the fixed rings and moves back and forth along the cross beams according to the length of the pipes and fittings joined by electro fusion.

Abstract: A convenient-used securing clamp comprises a pair of clamp hands, two distance-fixing clamps, two groups of throat pipe moulds and a mould base, wherein the distance-fixing clamp is a split structure that consists of two pieces which can be closed together or released; the throat pipe moulds are set inside the distance-fixing clamps with the same split structure, so as to be closed and released along with the distance-fixing clamps; the mould base is also the split structure, with its upper part connected with the distance-fixing clamps and the lower part connected with the pair of clamp hands, so that as the pair of clamp hands releases and closes, the mould base releases and closes.