SAFETY VALVE OF INDIRECT ACTION Russian patent published in 2019 - IPC F16K17/04 F16K31/12 

FIELD: machine building.

SUBSTANCE: invention relates to machine building hydraulics, in particular to safety devices of hydraulic systems of vehicles and mechanisms, and serves to protect systems in place of their installation from high pressures. Safety valve of indirect action contains hydraulic distributing housing (1), made with through channel, radial holes (4) and saddle (3) of the first stage. In the hydraulic distribution housing (1) the first stage gate (7), the second stage seat (8) and spring (9) located between them are located. Housing (20) has a through channel, one end of which is detachably connected to hydraulic distributing housing (1), and the other end is closed by adjusting screw (22). Housing (20) accommodates spring (23) of adjusting screw (22), ball (24) and gate (25) of second stage. Gate (7) of the first stage is made with seat (11), with ball (12) placed in it, displacement of which is restricted with perforated disk (13). Gate (7) of the first stage is made with radial hole (14), in which there is additional seat (15) with ball (16). Between housing (20) and hydraulic distribution housing (1) channel (28) is made, and between housing (20) and gate (25) of second stage there is cylinder (26) with radial holes (27). At that diameter of ball (12) is less than diameter of axial cavity (10) of gate (7) of the first stage.

EFFECT: technical result consists in improvement of performance of an indirect safety valve.

1 cl, 2 dwg