Description

TGSU Scraper Conveyor – Reliable Horizontal Conveying Expert

In feed processing and grain storage, materials need to be continuously and smoothly conveyed horizontally or at a small incline between different equipment. The TGSU series scraper conveyor is specifically designed for this purpose. Using a chain to drive scrapers that push material inside a closed trough, it offers advantages such as compact structure, good sealing, flexible layout, and multiple inlets/outlets. It is widely used in feed mills for feeding bins, discharging hammer mills, returning pellets, and bulk finished product conveying.

1. Working Principle

The TGSU scraper conveyor mainly consists of a drive unit (motor + reducer), head sprocket, tail sprocket (tensioning), chain, scrapers, U-shaped trough, inlets, outlets, and tension device.

During operation, the motor drives the head sprocket through the reducer. The sprocket moves the chain and attached scrapers inside the closed trough. Material falls through the inlet onto the trough bottom and is pushed forward by the scrapers. When it reaches the outlet, it is discharged by gravity or a deflector. The gap between scrapers and trough bottom is controlled at 3-5 mm to ensure effective pushing with minimal residue. The chain is typically roller chain or drop-forged chain, offering high strength and wear resistance. Scrapers are made of wear-resistant steel or polyurethane, selectable according to material properties.

2. Structural Features and Technical Advantages

1. Enclosed conveying, dust‑free
   The U-shaped trough is bent or welded as a single piece; the top cover is removable with sealing strips. Material travels in a sealed chamber, preventing dust leakage. Connection to a dust extraction point enables negative-pressure dust control.

2. Multiple inlets and outlets
   Several inlets can be opened on the top cover, and several outlets (with gates) on the bottom, allowing one machine to serve multiple purposes, simplifying the process and saving investment.

3. Compact structure, flexible layout
   Low profile, small footprint. Can be installed on the floor, under a mezzanine, or suspended from steel beams. Suitable for horizontal or small-angle (≤15°) conveying, and can run in reverse.

4. Wide material adaptability
   Suitable for powders (flour, bran, soybean meal), granules (corn, wheat, pelleted feed), small lumps (cracked feed, cakes), and wet materials (fermented feed, high‑moisture ingredients). Scraper speed is typically 0.3-0.6 m/s, reducing breakage and dust.

5. Wear‑resistant, low maintenance cost
   Trough bottom and sides are made of wear‑resistant steel (NM400) or fitted with liners. Chain is case‑hardened or heat‑treated. Polyurethane scrapers (low noise, gentle on particles) are optional. Long service life, easy replacement of wear parts.

6. Comprehensive safety protection
   Equipped with chain break alarm, speed monitor, overload protection, and reverse on jam. The tail tension device allows automatic or manual adjustment to maintain proper chain tension, preventing jumping or derailment.

7. Flexible drive options
   Left- or right-hand mounting; direct coupled or chain drive. Explosion‑proof motor and variable frequency drive optional for stepless capacity adjustment.

3. Typical Applications

• Batching bins feeding: Conveying ground material or mixed ingredients to multiple bins.

• Hammer mill discharge: Smooth conveying of milled material to an elevator or next process.

• Pellet mill return: Conveying off‑spec pellets from the grader back to the pellet mill.

• Bulk grain & finished feed: Conveying from silos to packing scales or bulk trucks.

• Biomass pellet plants: Conveying wood chips, straw pellets, rice husks, etc.

4. Model Parameters and Selection Guide

Main parameter range for TGSU series:

Selection considerations:

1. Conveying capacity: Multiply maximum hourly flow by safety factor 1.2 to select trough width and chain speed.

2. Material properties: Use lower speed and higher fill ratio for powders; higher speed for granules. Abrasive materials require wear liners.

3. Distance and bends: For long distances (>50 m) use heavier chain; if horizontal bends are needed, choose curved guides and special chain.

4. Discharge method: For multiple outlets, install pneumatic or electric gates at the bottom, ensuring good sealing.

5. Working environment: In dust explosion‑hazard areas, use explosion‑proof motor, anti‑static scrapers and earthing. Food‑grade applications require 304 stainless steel construction.

5. Maintenance and Care

1. Daily checks: Observe chain tension (sag 10-20 mm); listen for abnormal noise; check for blocked inlets/outlets; clean magnetic separator (if fitted).

2. Weekly checks: Inspect scrapers for deformation or breakage; check chain pins and bushings for wear; check sprocket tooth wear; tighten all bolts.

3. Monthly maintenance: Grease head and tail bearings; clean accumulated material from trough bottom; check gearbox oil level.

4. Semi‑annual: Change gearbox oil; measure chain elongation – if >3%, shorten or replace chain; check scraper‑to‑trough clearance – adjust or replace scrapers.

5. Long‑term shutdown: Empty all material, release tension, and periodically rotate the system to prevent rust.

6. Common Problems and Solutions

Conclusion

The TGSU series scraper conveyor, with its enclosed dust‑free design, multiple inlets/outlets, compact structure, and wide material adaptability, has become the standard equipment for horizontal conveying in feed, grain and chemical industries. Proper selection, correct operation and regular maintenance will greatly improve conveying efficiency, reduce operating costs, and ensure production continuity. We offer the full TGSU series from TGSU16 to TGSU40, support non‑standard customisation and complete conveying system design. Please contact us for inquiries or site visits.

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