One、Overview:

Spiral conveyors are one of the commonly used continuous conveying equipment, favored for their simple structure, small cross-sectional area dimensions, and especially for their ability to provide enclosed conveying with minimal environmental pollution. Currently, they are being used in the wastewater treatment industry as one of the material conveying devices.

II. Equipment Model Representation and Working Principle:

1. Method of equipment model notation:

WLS —  300   

Spiral Diameter (Φmm)

Spiral Conveyor

2. Working Principle:

The material conveying of the screw conveyor is propelled by rotating blades sliding, with the conveying direction determining the left or right rotation of the spiral blades and their rotational direction. Thus, it can be single-direction or bi-directional conveying as needed, and multi-point loading is also possible. The conveyor can be installed horizontally or at a certain angle. Materials enter the spiral through the feeding port (5) and are conveyed or discharged through the discharge port (1) as they pass through the spiral's rotation, or they can be transported to an extruder or dehydrator for compression or dehydration before discharge. The conveyor length L is selected by the user. The power-driven unit (6) uses a double helical gear reducer or a worm gear helical bevel gear reducer. It can be mounted at the entrance (push-type spiral) or exit (pull-type spiral) end of the conveyor. The U-shaped channel at the bottom of the equipment has protective bushes that prevent wear, which are selected based on the type of conveying material.

3. Key Performance Indicators:

Spiral Diameter: Φ200 - Φ400

Speed: 12 rpm - 20 rpm

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

Conveying Length: Less than or equal to 15 meters

Installation Inclination: ≤ 30°

3. Installation & Commissioning:

If not specified in the order contract, the machine is factory-equipped with a ground support bracket according to the user's discharge height, and 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, bushes, etc., during maintenance. Whether a drain is required at the bottom of the equipment is to be selected by the customer at the time of ordering.

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

4. The equipment must not collide or slip during lifting, and effective measures must be taken to protect the stainless steel surface of the equipment, preventing any scratches, wear, and dents.

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 more than 16 hours, replace the oil every 2500 hours. For equipment running 8 hours per shift, the interval can be extended to 4000 hours.

6. When conducting power-on testing, first perform a single operation to ensure there is no component friction before proceeding to normal operation.

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

Soy sauce solution is used to reduce vibration and noise. Inspect for abnormal wear between the sleeve and the helix. Strictly prohibit rotating the helix without material and lubrication measures, as this will severely damage the sleeve. (This applies to helices without support at one end.)

Four: Usage and Maintenance

Operators must be trained and qualified before they can operate.

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

3. Conduct daily machine operation inspections, ensuring no abnormal noises are present. Add bearing lubricant as needed and check for any leaks in the seals. Monthly, inspect the oil level in the drive unit's gear box and adjust it to the required level.

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

Each year: Inspect sealing wear and replace as necessary.

Every two years: disassemble and overhaul the equipment, clean the bearing housing, replace worn parts, replace seals and worn bushes, inspect and align the spindles, etc.

4. The reducer speed and conveying capacity are selected according to customer requirements. The conveying material must be even and not excessive or oversized.

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

6. When machinery is shut down for three days or more, flush or remove 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 freezing before restarting the machine.

V. Equipment spare parts and wear parts list:

Section 6: Equipment Troubleshooting