During the construction phase, an issue arose due to the inaccurate ordering of spare parts, which led to an extended maintenance period and caused a six-day delay in the project. The mill's steel balls were not falling properly, indicating a problem with the grinding process. The first end of the broken bolt, which was connected to the damaged end cap lining, was removed. The burr on the mating surface between the nut and the cylinder was smoothed out, and the connecting bolts were replaced and tightened securely. Additionally, the rear section was also replaced.
Before re-installing the liner, a castable material was placed between the liner and the cylinder gap to ensure proper alignment and sealing. Ercang also addressed the broken bolt associated with the output rafter plate by cutting away part of the slab skeleton that was affected. The nut was positioned between the cylinder and a 20mm thick steel plate, which matched the diameter of the discharge port. The steel plate was welded together with the rafter plate skeleton and lifting plate, and bolts were used to secure the assembly, connecting the rafter plate skeleton, cylinder, and steel plate tightly. In case of future issues, a small piece of steel plate could be cut from the 20mm thick plate to replace the broken bolt.
The maximum length of both the end cap liner bolt and the discharge tweezers bolt is M30×2×685. Due to the difficulty in removing these bolts, they had to be cut and extracted, which sometimes resulted in broken threads. Therefore, it was essential to have sufficient mechanical equipment available for such operations.
Special attention was given during the post-repair operation on October 6, 2004. Detailed records were kept, and a regular inspection system was established alongside irregular checks. During the repair process, the tightness of the hollow shaft flange and the barrel connection bolts was checked periodically, and all nuts were tightened with consistent force to prevent loosening.
In terms of pipe network layout, this approach can significantly save land space. Previously, most of the production and living cycle networks, sewage pipelines, and cable trenches were buried underground, requiring a total width of about 7–8 meters with more than 1.5 meters of spacing between pipelines. However, in non-freezing areas of southern China, the pipeline could be installed as a pole-type structure, occupying only 1–1.5 meters in width, thus saving approximately 5–6 meters of land. For the main cement production line, this design could save over 0.5 hectares of space. It also simplifies maintenance and overhaul processes, and it is even more efficient when combined with the cable tray system.
Rotary Lobe Pumps In Food Sauce
Sanitary grade lobe pump is one of the products specially developed by Durrex pumps company to meet the customers in the production process of high hygiene requirements. Working chamber has sanitary rotor, rotor locking nut O - ring, pump body without sanitary dead angle and Higher hygienic grade. Support CIP, SIP. The surface roughness is 0.2--0.8um, in accordance with 3A, FDA standards. Can be widely used food, medicine and other materials with high requirements for hygiene level.
Lobe pumps in food industry/ rotor pump in food industry/ Rotary lobe pumps
NINGBO DURREX PUMPS CO.,LTD , https://www.durrexlobepump.com