Spiral conveyor

One、Overview:

The screw conveyor is one of the commonly used continuous conveying equipment, currently. Its simplicity in structure, small cross-sectional area dimensions, and especially its ability for enclosed conveying with minimal environmental pollution make it a preferred choice in the wastewater treatment industry as a material conveying device.

Section II: Equipment Model Representation and Working Principle:

1. Method of Equipment Model Representation:

WLS —  300   

Spiral Diameter (Φmm)

Spiral Conveyer

2. Operating Principle:

The material conveying of the screw conveyor is achieved by the sliding movement of rotating blades. The conveying direction determines the clockwise or counterclockwise rotation of the spiral blades and their rotational direction. Therefore, it can be single-direction or bidirectional conveying, and multi-point loading is also possible. It can be installed horizontally or at a certain angle. Materials enter the spiral through the feed port (5) and are conveyed out through the discharge port (1) or sent to an extruder for compression and dehydration before loading. The conveyor length L is selected by the user. The power drive unit (6) employs a double helical gear reducer or worm gear helical gear reducer. It can be installed at either the inlet (push-type spiral) or outlet (pull-type spiral) end of the conveyor. The U-shaped channel of the equipment features a wear-resistant protective bushing, which is selected based on the type of material conveyed.

3. Key Performance Indicators:

Spiral Diameter: Φ200-Φ400

Speed: 12 RPM - 20 RPM

Flow Rate: Q = 2-6 cubic meters/hour

Conveying Length: ≤ 15 meters

Inclination installation: Less than or equal to 30 degrees

Section 3: Installation & Commissioning

If not specified in the order contract, the machine is factory-equipped with a ground support bracket based on the user's discharge height, which is secured during installation with expansion bolts.

2. Leave at least 0.7m of space above the top cover to ensure unhindered removal of the top cover, helix, sleeve, etc., during maintenance. Whether a drain outlet is needed at the bottom of the equipment is selected by the customer at the time of ordering.

3. Horizontal conveyors installed horizontally have a horizontal tolerance of 1/1000 in length, while those installed at an angle have an installation angle error of ±1 degree.

4. Equipment must not collide or slip during hoisting, and effective measures must be taken to protect the stainless steel surface of the equipment. Scratches, wear, and dents are not permitted.

5. Check the oil level of the helical pinion reducer before starting the machine. Change the lubricating oil after 300 hours of first use. For equipment running continuously for over 16 hours, replace the oil every 2500 hours. For equipment operating 8 hours per shift, the interval can be extended to 4000 hours.

6. During power-on testing, the machine should be manually activated first to ensure there is no component friction before entering normal operation.

7. Run the machine for two hours to磨合 newly assembled parts, using some appropriate lubrication (such as...).

Saponified solution is used to reduce vibration and noise. Inspect for abnormal wear between the sleeve and the helix. It is strictly prohibited to rotate the helix without material or lubrication, as this will severely damage the sleeve. (This applies to helices that do not have support at one end.)

IV. Usage and Maintenance

Operators must be trained and qualified before they can start operating.

2. Equipment is operated in accordance with the standard inspection, maintenance, repair, and lubrication management procedures.

3. Daily machine operation inspections show no abnormal noises; apply appropriate bearing lubricant and check for leaks in the seals. Monthly, check the oil level in the drive unit's gear box and top it up to the required level.

Open the top cover every six months to inspect the wear on the helix and sleeve, and check the tightness of all fastening connections.

Each year: Inspect seal wear and replace as necessary.

Every two years: dismantle and overhaul the equipment, clean the bearing housing, replace worn parts, replace seals and worn bushes, inspect and correct the helix, etc.

4. The speed reducer's RPM and throughput are selected according to customer requirements. The conveying material must be uniform and not excessive or oversized.

5. After a material blockage causes the helical screw to shut down, the cause should be investigated and the fault resolved before restarting the machine.

6. When the machine is shut down for three days or more, flush or remove the internal materials to prevent drying and caking (especially when temperatures are high). In winter, when temperatures are low, be mindful of frost prevention. Remove any caking or ice before restarting the machine.

V. Equipment Spare Parts and Wear Parts List:

Six: Equipment Troubleshooting