CONNECTION OF ROD AND PLUG VALVE AND TOOLS FOR CUTTING Russian patent published in 2020 - IPC F16K1/48 B23P19/04 B25B27/24 

FIELD: machine building.

SUBSTANCE: valve comprises a plunger having a first side, a second side located opposite the first side, an opening extending from the first side to the second side, wherein the first portion of the opening is tapered from a first diameter to a second diameter smaller than the first diameter, a valve rod located inside the valve plunger hole and including a first section, a second section, a third section located between the first and second sections, wherein the third section is tapered from the third diameter to the fourth diameter smaller than the third diameter, wherein the third section of the rod is engaged with said first portion of the opening, and taper surfaces of the first part of the valve plunger hole and the third section of the valve rod are configured to create a friction force preventing the valve stem from extending from the opening.

EFFECT: inventions relate to the field of valves design for fluid flow control and methods of their assembly, as well as structures of instruments used in valves assembly.

40 cl, 14 dwg