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I. Overview: A chain conveyor is a general term for continuous conveyors that use chains as flexible traction elements. It includes buried scraper conveyors (such as 0939), scraper conveyors (such as 2333), zipper conveyors (such as 2705), and skirt conveyors (such as 0705, 0706). Compared with other conveying machinery, these types of conveyors feature simple structures, ease of operation, as well as simplicity in manufacturing and maintenance; therefore, they are widely used in industries such as building materials, metallurgy, and grain processing. Features of chains: Chain conveyors all use chains as the traction elements, and the advantages of chains over other flexible traction elements are ； It is possible to bypass sprockets and pulleys with small diameters; especially when using chains with low torque, it is easy to fix working components to the chain. II. Taking the zipper conveyor as an example, this section provides a brief introduction to its structure and common faults. The zipper conveyors currently in use mainly include 2705(1)(2), 2706(1)(2), 2715, 2716, 0528, 2528, and grate cooler zipper conveyors, among others. 1. Working principle, performance, and applications: A zipper conveyor is a transportation device that uses the movement of chains within a closed trough to convey materials continuously. When in operation, materials flow continuously into the trough through the feed chute. Due to the weight of the materials and the movement of the chains, internal friction arises between the materials. The low speed of the chains (0.31 m/s) ensures a stable balance between the layers of material, with no significant relative movement between them; only near the side walls of the trough do the material particles exhibit slight lag. This stable balance allows for a continuous flow of materials, thereby achieving the purpose of conveying them. The materials are discharged from the outlet of the zipper conveyor. Its advantages include a simple structure, ease of installation and maintenance, flexibility in process selection and layout, the ability to feed materials from multiple points and discharge them from multiple points, as well as enclosed transportation of materials within the chamber, which reduces dust generation and improves the working environment. Currently, zipper conveyors are mainly used for transporting clinker. 2. Structural overview: The zipper machine mainly consists of a head drive mechanism, housing, traction chain, idler roller system, tail and tensioning device, alarm device, etc. The drive of the zipper machine is carried out by a transmission mechanism (such as 2705); the motor starts and, through a reducer, transmits power to the spindle equipped with sprockets. Driven by these sprockets, the chain moves slowly, transporting the material from the rear to the front and discharging it through the outlet. The teeth and hub of the sprocket at the head of the zipper machine are manufactured separately and connected together with bolts; the teeth can be replaced when they wear out. The traction chain is an important component of the zipper machine; it forms a closed loop by passing around the head sprocket and the tail sprocket. The upper branch does not transport material, while the lower branch does. The upper branch of the chain is supported by idler rollers, and the chain itself is composed of numerous links connected together by chain shafts. 3. Common faults and corrective measures: Cause of fault – Corrective measure. Misalignment of the vane strip; skewing of the head and tail wheels – Adjust the tension screw. Wear of the F-material conveyor tongue plate, or incorrect feeding point – Readjust or replace the tongue plate. Uneven wear of the bottom liner – Adjust or replace the liner. Breakage or reaching the end of normal wear – Replace it. Manufacturing defects – Conduct inspections and make replacements as necessary. Overloading – Never operate under excessive load. Blockage by objects – Remove the foreign objects. Wear or breakage of pins – Replace the pins. Welding failure of the ear plates, with pins protruding – Reset and re-weld them properly. Fracture of the support ribs – Replace them when normal wear reaches its limit; address manufacturing defects by replacing them. Damage to the bearings – Improve lubrication; replace them if lubrication is insufficient. Improper installation – Enhance the quality of installation. Poor meshing, misalignment of the turbine – Adjust it; replace the turbine teeth if they are worn. Wear of the vane strip rings and pins – Replace the vane strip