Hydraulically controlled water spool valve
AssigneeSchwing America, Inc.
InventorsRonald J. Cortopassi, Lawrence P. Schmidt, Robert W. Shallue, Roger N. Pearson
Life of this patent
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Abstract
A valve, to control the injection of lubricant into a viscous material pump pipeline is disclosed. The valve is operated off a parameter of the viscous material pump such as hydraulic fluid pressure from one or both differential/popper teed lines for the pump. The preferred valve includes coaxial water and hydraulic oil spools on opposing ends of a rod, and two hydraulic signals are used to control water flow through two outlets, to properly feed water to two lubricant injectors. Inlets and outlets of the valve are all located along one surface, and an intermediate chamber is provided to receive any leakage past the rod seals.
Claims19
A valve for controlling the injection of lubricant into a viscous material pipeline, flow of the viscous material in the pipeline being provided by a pump, comprising:
- a lubricant inlet which is open to a pressurized lubricant supply;
- a first lubricant outlet which is in intermittent fluid communication with the lubricant inlet, the timing of the intermittency being based on a parameter related to operation of the viscous material pump, the first lubricant outlet being connectable to the viscous material pipeline;
- and
- a second lubricant outlet which is in intermittent fluid communication with the lubricant inlet, the timing of the intermittency being based on a parameter of the viscous material pump, the second lubricant outlet being connectable to the viscous material pipeline.
A valve for controlling the injection of lubricant into a viscous material pipeline, flow of the viscous material in the pipeline being provided by a pump, comprising;
- a lubricant inlet which is open to a pressurized lubricant supply;
- a first lubricant outlet which is in intermittent fluid communication with the lubricant inlet, the timing of the intermittency being based on a parameter related to operation of the viscous material pump, the first lubricant outlet being connectable to the viscous material pipeline;
- wherein the parameter is an opening of a viscous material pump discharge valve.
A system for pumping a viscous material through a pipeline comprising;
- a pump which causes viscous material flow in a first line of the pipeline and causes viscous material flow in a second line of the pipeline;
- and
- a lubrication system comprising:
- a first lubrication injection port into the first line of the pipeline:
- a second lubrication injection port into the second line of the pipeline;
- a lubricant valve for controlling the injection of lubricant through the first lubrication injection port and through the second lubrication injection port,
- a first lubricant line connecting the lubricant valve to the first lubrication injection port;
- and
- a second lubricant line connecting the lubricant valve to the second lubrication injection port,
- wherein opening and closing of the lubricant valve from the first lubricant line to the first lubrication injection port is based on a parameter related to operation of the viscous material pump.
A system for pumping a viscous material through a pipeline comprising:
- a pump which causes viscous material flow in a first line of the pipeline, wherein the pump comprises a viscous material discharge valve, and opening of the viscous material discharge valve indicates viscous material flow in the first line;
- and
- a lubrication system, the lubrication system comprising:
- a first lubrication injection port into the first line of the pipeline;
- a lubricant valve for controlling the injection of lubricant through the first lubrication injection port;
- and
- a first lubricant line connecting the lubricant valve to the first lubrication injection port,
- wherein opening and closing of the lubricant valve from the first lubricant line to the first lubrication injection port is based on the opening of the viscous material discharge valve.
Dependencies are inferred from the claim text.