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How to install the reactor melt pump?

The installation of the reactor melt pump must strictly follow the requirements of precision control and working condition adaptation. The following is the complete standardized installation process:

1、 Preparation work before installation

Equipment verification: Open the box and inspect the pump body, gear shaft, sealing components, and other parts for any damage or collision. Confirm that all accessories are complete. Use lifting ring screws to lift and transport 100CC and above models.

Basic requirements: The installation foundation should be flat and stable, the concrete foundation strength should meet the standard, sufficient operating space should be reserved, and the pre embedded position of the anchor bolts should be accurate.

Component pre-treatment: Apply specialized high-temperature lubricating oil to all moving parts before assembly, and evenly apply high-temperature resistant grease to the threaded parts of bolts.

Accuracy verification: Use measuring tools to check the concentricity between the pump seat and the motor drive shaft, and confirm that the rotation direction of the pump shaft is completely consistent with the direction indicated in the order.

2、 Core body installation steps

Workstation positioning: Install the melt pump at the bottom of the reaction vessel, and use a large flange at the suction port to connect with the discharge port at the bottom of the vessel. It can be arranged horizontally or vertically.

Transmission connection: The drive combination of "motor+reducer+universal joint" is adopted, and the installation error of the universal joint is controlled within the allowable deviation range to compensate for the displacement caused by the thermal expansion of the reaction kettle.

Pipeline docking: Connect the inlet and outlet pipelines to ensure that there is no additional stress acting on the pump body. Simultaneously connect the thermal oil circulation interface to ensure that the melt does not cool down or solidify during operation.

Sensor installation: Install pressure and temperature sensors in the reserved holes of the pump body to ensure accurate measurement data without deviation.

Sealing assembly: The radial clearance between the gland and the shaft of the packing seal is controlled at 0.4~0.5mm, the packing cut is at a 30 ° angle, and the interfaces of each ring are staggered by 120 °. After the installation of the mechanical seal component, it passes the 0.2MPa pressure test for 30 minutes.

Bolt tightening: Use 12.9 grade high-strength bolts to connect the various components of the pump body, and tighten the front and rear cover plate bolts in diagonal order to ensure that the pump shaft can rotate freely and easily without any jamming.

3、 Post installation commissioning and startup

Preheating operation: The pump body is uniformly heated to the working temperature at a rate of ≤ 120 ℃/hour, and fully insulated for 30-60 minutes. It is forbidden to start it directly in a cold state.

Low speed test run: Start the pump at an extremely low speed of around 5rpm, run at low speed for 5-10 minutes, and gradually increase the speed and working pressure after all bearings are fully lubricated.

Working condition matching: After confirming the establishment of stable pressure at the pump inlet, gradually adjust to the production required speed, use frequency conversion speed regulation to achieve near linear flow output, and adapt to the high viscosity melt conveying requirements of the reaction kettle.

4、 Precautions for installing pit avoidance

It is strictly prohibited to use sharp tools to strike components throughout the process. When striking, only copper rods or rubber hammers can be used to avoid damaging precision components such as gears and bearings.

It is strictly prohibited for the motor to drive the pump to idle for a long time. It is necessary to ensure that the pump is filled with molten material before gradually loading the load.

After installation, it is necessary to confirm again that the universal joint has no additional stress to avoid the transmission shaft from breaking during operation.

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