INJECTOR UNIT FOR INJECTION OF LIQUID INTO GAS LINE Russian patent published in 2003 - IPC

FIELD: operation of equipment for compressed gases; gas, oil and other industries. SUBSTANCE: proposed injector unit includes lock mounted on branch pipe of pipe line including shut-off valve and lock chamber with seal, cylinder with seal, hollow plunger with injector at lower end and hollow rod on upper end. Brought to upper end of hollow rod is flexible pipe line provided with valve connected to delivery line of pump; inner cavity of cylinder is connected with delivery line of pump through regulating valve. Besides that, device may be provided with reservoir having media divider inside it; cavity of reservoir is filled with hydraulic fluid on one side of divider and is communicated with inner cavity of cylinder; cavity of reservoir on other side of media divider is communicated with delivery line of pump through regulating valve. Proposed injector unit may reliably operate at wide range of pressure differentials both in automatic controllable and non-controllable modes. Proposed device excludes penetration of gas from gas line into delivery line of pump and service reservoir in case check valve is leaky and ensures favorable operating conditions for friction pairs (when device is provided with hydraulic fluid reservoir). EFFECT: enhanced reliability. 2 cl, 2 dwg