Installation of POY spinning testing machine

The following are the general steps for installing POY spinning testing machine:

First, preparation before installation

Site requirements

The installation site should be flat and solid, and can bear the weight of the equipment. Generally, the ground bearing capacity is required to be not less than the self-weight of the equipment plus the additional load that may be generated during operation. For example, if the equipment weighs 5 tons, an additional load of 1 ton may be generated during operation, and the ground bearing capacity should be at least 6 tons/m2.

The site needs good ventilation to exhaust the chemical gas generated in the spinning process (for example, when using some chemical fiber raw materials). At the same time, to keep proper temperature and humidity, the temperature should be controlled at 20-30℃ and the relative humidity should be around 60%-70%, which is helpful to ensure the spinning quality.

In terms of space, it is necessary to ensure that there is enough height (generally, the height of the factory building is not less than 4-5 meters) and area for the installation, operation and maintenance of the equipment. A passage of at least 1-1.5 meters should be reserved around the equipment to facilitate personnel walking and maintenance.

Preparation of tools and materials

Prepare common installation tools, such as wrenches, screwdrivers, calipers, level meters, etc. Wrenches are used to fasten bolts, screwdrivers are used to remove and install screws, calipers are used to check the dimensional accuracy of parts, and levelers are used to adjust the levelness of equipment.

According to the requirements of the equipment, prepare corresponding connecting materials, such as pipes (used for conveying spinning raw materials, etc.), wires and cables (used for power supply and signal transmission of the equipment), sealing materials (such as rubber gaskets to prevent liquid or gas leakage), etc.

Second, the equipment is in place

Host installation

Carefully transport the POY spinning tester host to the installation position by crane or forklift. In the process of handling, attention should be paid to maintaining the balance and stability of the equipment to avoid collision. For example, for a larger spinning testing machine, the lifting point of the crane should be selected near the center of gravity of the equipment, and the lifting speed should be moderate.

Place the main engine on a pre-prepared foundation or bracket, and check the levelness of the equipment with a spirit level. By adjusting the anchor bolts or gaskets, the levelness error of the equipment in the longitudinal and transverse directions shall not exceed 0.1-0.2mm/m/m.. This is because levelness will affect the fiber tension and uniformity in the spinning process.

Component installation

Install spinning box. Install the spinning box on the corresponding position of the main engine accurately, and ensure that the spinning box is closely connected with the main engine and well sealed. Generally, it is connected by bolts, and sealing gaskets are placed between the connecting surfaces to prevent spinning solution from leaking.

Install metering pump. The metering pump should be installed in an accurate position to ensure that the spinning solution can be accurately measured and transported. After installation, check the rotation flexibility of the metering pump, and manually rotate the shaft of the metering pump, which should be able to rotate easily without sticking.

Install cooling device (such as cooling duct or cooling roller, etc.). The installation position of the cooling device should meet the design requirements to ensure that the spinning fiber can be cooled effectively. For example, the cooling air duct should match the spinning path, so that the fiber can fully contact the cold air, and the surface of the cooling roller should be flat and smooth to ensure the cooling uniformity of the fiber.

Third, the pipeline connection

Spinning liquid pipeline

Connect the spinning solution supply pipeline, and use suitable pipes (such as stainless steel pipes). The inner diameter of the pipeline should be determined according to the flow rate and viscosity of spinning solution. Generally speaking, for high-viscosity spinning solution, the inner diameter of the pipeline should be slightly larger to reduce the resistance.

In the process of pipeline connection, attention should be paid to sealing. Flange connection and installation of sealing gasket can be used, or welding connection can be used (for stainless steel pipes). After welding, flaw detection should be carried out to ensure welding quality and prevent spinning solution from leaking.

Cooling medium pipeline

If it is air-cooled, it is necessary to install ventilation pipes, and the direction of the pipes should be conducive to the circulation of air. The material of ventilation pipeline can generally be galvanized iron sheet or plastic (such as PVC), and it is necessary to ensure that there is no air leakage in the pipeline.

If it is water-cooled, connect the cooling water pipeline. Cooling water pipes usually use metal pipes (such as copper pipes or stainless steel pipes), and the connection methods include welding and threaded connection. After the connection, pressure test should be conducted, and the pressure is generally 1.2-1.5 times of the working pressure, so as to check the pressure resistance and tightness of the pipeline.

Fourth, the electrical system installation

wiring

According to the electrical schematic diagram of the equipment, lay wires and cables. Attention should be paid to laying wires with different functions (such as power lines and signal lines) separately to avoid electromagnetic interference. Generally, thick cables are used for power lines to meet the power requirements of equipment.

The wire joints shall be firm and reliable, and appropriate terminals or welding methods shall be adopted. In areas with explosion-proof requirements (such as the use of flammable and explosive spinning materials), explosion-proof junction boxes should be used, and the insulation layer of wires should meet the explosion-proof standards.

Electrical equipment installation

Install electrical equipment such as motors, frequency converters and sensors. The motor should be installed firmly, and the connection between its shaft and the driven part should be concentric, and the concentricity error should not exceed 0.1 mm. The frequency converter should be installed in a well-ventilated place to avoid overheating, and the parameters should be set according to the instructions.

Sensors (such as temperature sensors, tension sensors, etc.) should be installed accurately, which can truly reflect the measured physical quantities. For example, the temperature sensor is installed on the spinning box or cooling device, and should be in good contact with the measured surface to ensure the accuracy of temperature measurement.

V. Inspection before commissioning

Mechanical part inspection

Check whether all mechanical connecting parts, such as bolts and nuts, are fastened. Bolts at key positions shall be inspected and tightened with a torque wrench according to the specified torque.

Check the lubrication of rotating parts of the equipment (such as spinning reel, metering pump shaft, etc.) and add proper amount of lubricating oil or grease. Rotating parts should rotate flexibly, without abnormal sound and jamming.

Pipeline inspection

Check whether all pipes are firmly connected and sealed. Purge the pipeline system to remove impurities (such as dust and welding slag) in the pipeline. For liquid pipelines, clean water can be used for pressure test to check whether there is leakage.

Electrical inspection

Check whether the wiring of the electrical system is correct, and use an insulation resistance meter to check the insulation resistance of wires and cables. The insulation resistance value should meet the equipment requirements (generally not less than 0.5 megohm).

Check the electrical equipment before electrifying, and check whether the grounding of the equipment is good, and the grounding resistance is generally less than 4 ohms. Then carry out no-load power-on test to check whether the motor, frequency converter and other equipment can start and run normally.