The determination of the redundancy of the single pump water supply should be determined mainly based on the duration of the accidental water supply flow. If the accidental water supply flow is allowed to last for a long time, the standby pump set is fully activated during this period; however, if it is difficult to start a new pump set for the duration of the accidental water supply flow, the single pump water supply redundancy technique should be considered. The so-called single-pump water supply redundancy refers to the ratio of the pump that is in normal water supply and does not reach its full water supply capacity. When a sudden accident occurs, one set of pumps stops working. If the remaining sets of pumps can use their remaining water supply capacity to compensate for the drop caused by a group of pumps stopping the pump, the pumping station can restore the water supply capacity in a short time. Under normal circumstances, the utilization of single-pump redundancy should be implemented with frequency conversion adjustment technology to avoid the waste of children in normal water supply. For water supply systems that allow accidental water supply flow percentages to exceed 80% and allow accidental water supply flow durations to be less than 10 minutes, single pump water supply redundancy should be considered to ensure water supply.
The safety and reliability design of the pump contact pipe pump contact pipe corresponds to the number of water pump inlet wells and the number of pump groups, and should be segmented accordingly. The number of sections of the water pump communication pipe should be the same as the number of water pump inlet wells and the number of pump groups. Generally, when the percentage of the accidental water supply flow rate is 70%, it can be designed in three stages. When the percentage of the allowable water supply flow rate is 80%, it can generally be designed in four stages. The section of the contact pipe is separated by setting a service valve on the contact pipe to ensure that the rest can be supplied normally. The outlet pipe of the pumping station pumping station is generally set to two, and the diameter of the pipe should be determined according to the percentage of allowable water supply flow and the allowable time. Generally, when the percentage of the accidental water supply flow rate is 70% or 80%, the pipe diameter can be designed according to the corresponding flow rate. In short, the scientific design works well, which not only meets the requirements of users, but also ensures the normal operation of the equipment.
Material (l) Reinforcing steel bars should be in accordance with the requirements of "Reinforced Bars for Hot Rolled Ribbed Steel GB1499-1998 Requires Reinforcement" GB149 public to be called to climb the old country, than the rough marsh seven Yanna praised, the enthusiasm male marsh door Yin, the common straight through and the depth of the foot bolts of the ground anchor bolts. Common buried depth of the foot bolts Remarks Diameter (mm) (m) Dead hook bolts 10 - 48 (20 - 25) d lathe foundation Commonly used bolts straight hook bolts 16-56 (20-25) d common bolts bent bolts 24-3620d knife-shaped bolts (3620d beam, multi-purpose claw bolts on the plate 35-7610-20d anchor bolts 301020d commonly used bolt straight bolts Epoxy mortar anchor bolts live bolts), easy to replace and have voids; oily or corrosive media penetrates into the concrete along the bolts, corrodes concrete and bolts, reduces the grip strength of concrete on bolts; equipment overload shock, exceeds The ability of the bolt to carry. When the concrete strength reaches 60% to 80% of its design strength, a layer of epoxy anticorrosive mortar is applied to the base surface to prevent corrosion of the concrete by the corrosive liquid.
In summary, the repair method of anchor bolts has been successfully applied to the model Y75-11A kiss. 22.4D fan anchor bolt repair, the use period of up to 5 years, no loosening of the anchor bolts. The construction method of the anchor bolt is also applicable to the bolting of the foundation of the newly built equipment, which can ensure the long-term operation of the equipment, reduce the loss rate of the equipment, improve the integrity of the equipment, and transform the economical efficiency of the long-term operation of the enterprise. The most basic conditions.
Plastics Pigment, Plastic Antioxidant, Plastics Organic Pigment, Plastics Solvent Dyes, Calcium Acetylacetonate (CAS No.19372-44-2)
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