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Multi-row chain conveyor uses standard chain plates as the carrying surface, and is powered by a motor reducer； By arranging multiple rows of chain plates in parallel, we can make multi-row chain plate conveyors quite wide and create a differential speed effect; the speed difference between these rows allows the multi-row conveyor to function as a single-row conveyor without any squeezing, thereby meeting the requirements of equipment used for beverage labeling, filling, cleaning, and other processes that require single-row conveying. 1. Multi-row chain conveyor belts, when subjected to pulsating loads over extended periods of time, experience fatigue failure at stresses far below their breaking strength; the fracture site is generally at the transition point where the arc of the chain link meets the straight section. 2. The manufacturing quality of multi-column chain conveyor belts does not meet the standards; the quality of the materials and the level of heat treatment are insufficient. 3. The conveyor chain of multi-row chain plate conveyors experiences wear due to continuous contact and friction with the chain plate grooves, sprockets, and materials during operation. The transition areas where arcs meet straight lines are the most severely worn; as a result, the load-bearing cross-sectional area decreases, leading to reduced strength. Wear occurs in three main areas: on the outer sides of the straight sections and arc sections of the chain links, caused by the materials or chain plate grooves, and on the inner sides of the links, resulting from the connections between them. 4. Corrosion of the connecting links in multi-row chain conveyor chains leads to rust, pitting, and peeling, which reduces the cross-sectional area and lowers the tensile strength. 5. When iron objects or similar are mixed in the material conveyed by a multi-row chain conveyor, this can cause the chains to get stuck, and the tension in the chains may be broken as a result. 6. In multi-belt chain conveyors, the transmission chains start frequently under full or overloaded conditions, causing the impact forces on these chains to exceed their strength limits. 7. The chain tension of multi-row chain conveyor chains is insufficient and too loose, resulting in chain stacking; this causes the chain plates to emerge from the troughs and leads to chain jamming. 8. Excessive pre-tension in multi-belt chain conveyors causes the conveyor chains to be too tight, accelerating their wear; when jamming occurs, there is no room for cushioning, which shortens their service life. 9. When the spacing between the chain plates of a multi-row chain conveyor exceeds twice the required spacing, as it moves toward the machine head, the tension in the conveyor chain causes the sections without chain plates to stretch out and prevent them from sliding within the groove of those chain plates. The next chain plate also becomes stretched due to this tension, interfering with the unloading mechanism at the machine head; this leads to chain jamming and eventually chain breakage. 10. In multi-belt chain conveyors, if the tension of the two chains is not equal, the load is concentrated on the tighter chain, thereby exceeding its strength limit.