Liquid Injection Metering Feeder

Liquid Storage & Level Monitoring

• Liquid is stored in a 304 stainless steel storage tank.
• A low-level sensor continuously monitors the liquid level inside the tank.
• When the liquid level drops to a preset safety lower limit, the sensor triggers an alarm, alerting the operator to replenish the liquid promptly, thereby preventing pump dry running which could cause damage or interruption of supply.

Precise Volume Metering & Delivery(The stainless steel plunger metering pump)

• Working Principle: The motor drives the plunger to perform a reciprocating motion within the pump chamber.
• Volume Metering Principle: The volume of liquid discharged per reciprocating stroke of the plunger is fixed. Therefore, the pump’s output flow rate directly depends on the frequency (rotational speed) of the plunger’s reciprocating motion.
• Flow Rate Adjustment: The variable frequency speed control method adjusts the power supply frequency to the pump motor, thereby steplessly adjusting the motor’s rotational speed (i.e., the reciprocating frequency of the plunger). Higher rotational speed results in a larger volume of liquid discharged per unit time (higher flow rate); lower rotational speed results in a smaller flow rate. This achieves precise, linear control of the liquid volumetric flow rate.

High-Pressure Stable Delivery

• The liquid discharged from the metering pump is at a relatively high pressure.
• Ferrule-type high-pressure piping connects the pump and the spray gun, responsible for safely, reliably, and leak-free transporting the metered liquid to the spray gun inlet under high pressure. Ferrule-type fittings offer good sealing and high-pressure resistance, making them suitable for such applications.

Injection (Spray Gun)

• It receives the high-pressure, precisely metered liquid flow from the high-pressure piping.
• The spray gun is typically designed with a specific nozzle or outlet structure; its core functions are: To accurately guide and inject the liquid into the designated position of the extruder. Constructed from 304 stainless steel material, ensuring it can withstand the system pressure and the chemical nature of the conveyed liquid.

Overall Support & Control

• The metering injection system support frame provides a stable support platform for the main components (storage tank, metering pump, electrical control cabinet, etc.). Its steel section welded structure ensures rigidity; paint treatment prevents rust.
• Protective panels provide safety shielding, preventing accidental contact with moving parts or high-pressure piping.
• The electrical control cabinet is installed on the frame.
• Equipped with heavy-duty casters (universal wheels), facilitating movement.