During the construction process, due to inaccurate ordering of spare parts, the maintenance time was extended, and the project had to be shared for six days. One issue encountered was that the steel balls in the mill were not falling properly. The first end of the broken bolt, which corresponded 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. The back end was also replaced to ensure proper alignment.
Before installing the liner, a castable material was placed between the liner and the cylinder gap to prevent any misalignment or leakage. Ercang removed the broken bolt associated with the output rafter plate in the mill and cut off part of the slab skeleton that was affected by the broken bolt. 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 passed through the raft, skeleton, cylinder, and steel plate to secure everything firmly in place. In case of a broken bolt, a small piece of steel plate could be cut from the corresponding 20mm thick steel plate to replace it.
The maximum length of the end cap liner bolt and the discharge tweezers bolt was M30×2×685, making it difficult to remove. As a result, the only option was to cut the bolt and extract it. Some of the bolt threads were damaged during this process, so it was essential to prepare sufficient mechanical equipment to handle such situations.
Special attention was given during the post-repair operations on October 6, 2004. Detailed records were kept, and a regular inspection and irregular inspection system was established to ensure long-term stability. During the repair, the flange of the hollow shaft and the connecting bolts were checked periodically for looseness, and all nuts were tightened with consistent force to maintain structural integrity.
In terms of pipeline layout, an elevated design can save valuable land space. Traditionally, most 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 them. However, in non-freezing areas like southern China, these pipelines can be installed on poles, reducing the required width to just 1 to 1.5 meters. This approach can save up to 5 to 6 meters of land. For a main cement production line, this method can save over 0.5 hectares. Additionally, it is easier to maintain and inspect, and it’s even more efficient when combined with cable trays.
Rotor Pump With Water-proff Cover
We are a world-leading technology-based enterprise
focus on R&D and manufactures non-Newtonian fluid conveying equipment. We
specialize in rotary pumps, homogeneous pumps and grinding pumps. We have
obtained 11 invention Patents and 46 practical patents, and won many national honorary
titles.
Twin-rotor
lobe pump are multi-functional and bi-directional positive displacement pumps,
produced with fine technology. These products use synchronic rotors, driven by
a pair of synchronic gears in the gear box. Transmitted by the main shaft and
the sub-shaft. The rotors move synchronically in counter-clockwise a
directions, which, consequently, varies the pump capacity and builds up high
vacuum capacity and emission pressure. It is particularly suitable to pump
sanitary medium, high-corrosive and high-viscous medium.
Rotor
pump with water-proff cover: The pump is equipped with a detachable protective
cover for the whole machine, and the material is S.S., it can protect the
motor, coupling and other parts from corrosion during on-site cleaning.
In
the past 30 years, we dedicate to provide the scientific and professional
solutions in fluid field. In the field of complex fluid transportation, our
company's R&D technology, manufacturing technology, application technology is
at the leading position in the world.
Durrex pumps can be widely used in food, consumer chemical, refined
chemical, paper making, chemical fiber, pharmaceuticals, coating, etc. We will
continue to focus on scientific research and innovation, improve the level of
precision manufacturing, and continuously promote the intelligent development of
fluid transportation industry, to create greater value for global users
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NINGBO DURREX PUMPS CO.,LTD , https://www.durrexlobepump.com
