SU529331A1 - Unloaded valve - Google Patents

Description

(54) UNLOADED VALVE

one

; The invention relates to reinforcement technology.

The unloaded valve is known, with the pore body interacting with the right-hand body and moving from the right-hand stem and unloading 11 C} located in the casing, with 5 cavities of which are formed in the casing,

G However, in a well-known unloaded valve, it is not possible to discharge from the forces of pressure; laziness of the medium when the valve is operating in any j mode and in any supply direction of the center.

The proposed valve differs from that of JBECTHorq in that in the over-piston cavity 1 there is an additional cavity in communication with the podreshchnevaya cavity, the channel has an additional cavity. 15: an additional piston is installed there, which is axially displaced with a possibility of axial displacement on the jaws, with the active area of the additional axle being equal to the unbalanced area of the axle.

- Such a design allows to provide full unloading when the medium is supplied in the direction when the valve is operated in the reverse mode and in the shut-off mode with forced closing. .AND

The drawing shows the proposed valve

In the housing 1 with the supply channels 2. and 3, the locking member 4 is intermixed from the actuator by the rod 5 with the discharging forces 6 and the rods 7 i (optional) that can be axially moved onto it. Active is. Spare rod 5 is equal to an unbalanced valve body. The active area of the rod 7 is equal to the unbalanced area I of the rod 5. In the housing 1, also ka are filled (Zialy 8 and 9 connecting the piston half of the piston to the supply channels and seals are placed 10 and 10-13 and the compensator 14.

Valve works as follows. When the medium is fed into the inlet valve 4, it flows through the channel 8 and enters the piston cavity 4 supported by the shut-off body 4 of the discharge casing 6, the active area of which is equal to the active member of the stop valve sealing the channel 2. Due to the equality of the area, an equilibrium of the pressure forces acting on the closure body 4 and the unloading force is achieved.

piston 6. The drive is fully loaded due to the pressure of the medium.

When the medium is fed into the supply channel 3, it flows through the channel 9, creates a force on the rod 5 from below and simultaneously enters the above-piston cavity of the additional piston 7 unloading supported on the rod of the rod 5, the active area of the additional piston 7 being equal to the unbalanced rod area 5. This achieves an equilibrium of forces acting on the rod 5 from the bottom and on the additional piston above the pressure of the medium.

The forces from the effect of pressure on the rod are not transferred to the actuator, which is completely unloaded.

Thus, the complete discharge of the rod allows the use of a valve for operation.

at high and ultrahigh pressures with reduced weights and dimensions.

Claims (1)

Invention Formula Unloaded valve with placed in the housing interacting with the shut-off member and the stem and discharge piston moved from the drive, by means of which two cavities are formed in the housing, characterized in that, in order to ensure unloading when the medium is supplied in any direction, the channel connected to the piston cavity is cavity and in It has an additional piston mounted with the possibility of axial mixing on the rod, with the active area of the additional piston being chosen equal to the unbalanced area of the rod.