I. Basic Information: Application and Purpose: Dedicated for cement plants. Transportation and Packaging: Sea transportation. Automation Level: Based on customer requirements. Origin: China. Customization Services: Customizable. II. Structural Features: The grate cooler is mainly composed of a lower shell, a grate bed, an upper shell, a transmission device, a control flow grate plate air duct, a hopper and airlock device, a support and guide wheel device, a centralized grease lubrication system, a clinker crusher, a snow removal device, a ladder platform, a fan, automatic control and alarm devices, etc. III. Operating Principle: The fourth-generation grate cooler can be broadly categorized into two types: rod-type and step-type. The earliest one was the bar-type grate cooler produced by Smith Company. Its grate bed was arranged at an angle and was fixed in place, with materials conveyed by the pushing rods above the grate bed. The fan provided cooling air, and the crusher crushed clinker. Its advantage was good sealing effect for leakage prevention. However, its disadvantages were that the pushing rods wore out quickly, and the inclined arrangement to solve the conveying problem led to higher construction costs. The step-by-step grate cooler is a fourth-generation model that emerged later. Its grate bed adopts a column-wise step-by-step movement method, where each column moves forward together and then returns in batches, with materials being conveyed under the influence of inertia and the compression from subsequent materials. The fan provides cooling air, while the crusher crushes clinker. Its advantages include less wear on the grate plates, high conveying efficiency, and a horizontal arrangement of the grate bed. However, the longitudinal seal is prone to wear, and the technology for longitudinal sealing is challenging. IV. Performance Advantages: Our company's grate cooler is a fourth-generation step-feeding type that ensures no material leakage. It not only maintains the advantages of the latest fourth-generation machines, such as no material leakage and low discharge temperature, but also exhibits particularly outstanding stability. 1. The travel distance of the grate bed is up to 400mm. With this, the grate speed is very low while meeting the conveying capacity, significantly improving the working conditions of all wear parts of the grate cooler. 2. Small closed-loop control and displacement sensors are adopted. The position of the grate bed is accurate, and the hydraulic operation is stable; moreover, the travel distance of each column is very easy to adjust, effectively avoiding the red river phenomenon on both sides. 3. The wear of the supporting device is small. The supporting device adopts the classic roller guide wheel, with a simple and reliable structure. The contact area is specially enlarged, and the surface is treated with high-efficiency wear resistance. Coupled with the improvement in working conditions brought by no material leakage, the wear resistance is excellent. After 5 years of actual operation, no significant wear phenomenon or sinking of the grate bed has been observed. 4. The longitudinal base adopts large H-beam steel. With a width of around 600mm, it boasts strong rigidity, effectively enhancing operational stability. 5. The movable grate plate is welded integrally with the longitudinal beam. The 100mm of cold clinker accumulated on the air duct moves synchronously with the grate bed and protects the movable grate plate, so that the movable grate plate is no longer a wear part but becomes a structural part, with a working life of more than 5 years. 6. The longitudinal sealing strip is sturdy and wear-resistant. With a large and thick cross-section, it has strong resistance to various adverse factors; the sealed air duct is long, making it less prone to material leakage; the standard section of the sealing strip is about 1 meter long, allowing for staggered arrangement, ensuring that the seams will never collide; the sealing strip is arranged in the groove between the longitudinal columns, using reliable lock washers, and is easy to replace and adjust. The expected service life is over 3 years. 7. The air chamber under the grate bed has good sealing performance. The side wall panels of the air chamber are equipped with double-layer doors, fixed observation windows, and docking lubrication oil pipes, completely avoiding air leakage from the third-generation machine. The internal partition wall sealing uses sealing materials up to 30mm thick, greatly improving air leakage in the air chamber. 8. The hydraulic system has low working oil pressure. The working conditions of hydraulic components have been improved, making the hydraulic system less prone to oil leakage.