I have a large storage tank equipped with a pump that is used to deliver liquid to multiple locations. How should this pump be controlled? ?
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I have a large storage tank and a pump used to deliver liquid to multiple locations (to other storage tanks). How should this pump be controlled? ? Can it ensure that medications are available in a timely manner when needed at each point of use? Multiple sites may be treated with medication simultaneously, in an irregular manner, with intermittent administration.
Each branch is equipped with a flow control valve and a quick shut-off valve.
I have worked on a hazardous materials distribution system, with 8 types of raw materials and 16 transfer pumps, one in use and one as a backup (the pump cabinets are quite large). 1 pump outlet valve, with interlock targets including high and low fork level alarms in 9 workshops + manual/automatic operation column.
This pump should be in a normally open state; a distribution panel can be designed to use control valves to regulate the branches leading to each user. As for how to control it, it depends on the user’s needs; whether intermittent feeding or continuous and stable feeding is required, there are no issues with either.
A diaphragm pump can be used; as many branches as required can be created for the injection points, and the amount of fluid injected at each point can be adjusted by controlling the valves associated with those branches. However, a return line must be installed on the main outlet pipe of the diaphragm pump, equipped with a valve, and check valves should be placed at the end of each injection point. The amount of fluid injected at each point can only be adjusted manually
One pump has multiple output points, and control can only be switched via valves. However, with multiple points of delivery simultaneously and a constant pump flow rate, it’s uncertain whether the amount distributed to each point will meet your timing requirements. Regarding control, you can go to the instrument control section and ask whether it’s possible to link the pump motor with solenoid valves or electric valves, so that the pump starts as soon as a valve is opened. Of course, this is just my idea.
A frequency converter can be added; it is linked to the pressure transmitter behind the pump to ensure that the pressure remains stable at all times
The pump needs to be equipped with an inverter, and each branch should allow for fixed-volume filling control, just like at a gas station
A pressure sensor is installed on the pump outlet manifold; the pump starts automatically when the pressure drops below a certain value, and stops operating or a flow-limiting orifice is used to induce backflow when the pressure rises above that value. If the flow rate is insufficient to meet the peak medication demand, a high-level buffer tank can be installed to reduce the number of times the pump needs to be started and stopped; the choice should be made based on specific operating conditions in order to meet energy-saving requirements.
How is constant-volume filling control achieved? ?