As we all know, in the event of a fire in a high-rise building, it is often necessary to build a self-rescue for each high-rise building based on a bolting system or a sprinkler system. In other words, it is vital that high-rise buildings rely mainly on their own facilities. Here, the fire-fighting facilities of the constant-pressure fire-fighting water supply equipment can be used to complete the fire rescue. To this end, let’s talk about a little fire pump startup advice.
First of all, we should understand that the constant pressure fire water supply equipment is composed of fire pump sets, pipes, valves, electric control cabinets and primary instruments. There are many factors affecting the reliability of constant pressure fire water supply equipment. It is a common method to analyze the probability from the mathematical point of view to obtain the reliability. This paper only combines the new technology from the startup mode of the fire pump. The application to discuss the reliability of water supply equipment.
For the mechanical product of the pump, in the long-term use process, some wear problems will inevitably occur. As a kind of product in the pump, the constant pressure fire pump will, of course, have such a problem, for the constant pressure fire pump. It is said that the parts that are more prone to wear mainly include the drive shaft and bushing, the center hole and the pin of the driven gear, the inner cavity of the pump casing and the gear, the end face of the gear and the pump cover, etc., and when wear occurs, it will lead to some undesirable phenomena, such as insufficient pump oil, requires measures to be repaired in time.
When the drive shaft and the bushing wear, the fit clearance will increase, and this will affect the pump oil quantity. The drive shaft or bushing can be used to recover the normal fit clearance. If the drive shaft is only slightly worn, then only the old bushing needs to be pressed out, and the standard size bushing can be replaced, so that the fit clearance can be restored, and if the drive shaft and bushing wear more seriously, And when the clearance is seriously exceeded, not only the bushing should be replaced, but also the diameter of the drive shaft should be increased by chrome plating or the whole surfacing method, and then ground to the standard size, and the bushing Cooperate to restore to the required standards.
The wear of the lubricating oil pump casing is mainly manifested in cracks in the casing. At this time, the 508 nickel-copper welding rod can be used for welding, the weld must be tight, and the error of the flatness of the joint surface between the air hole and the pump cover is ≤0.05Mm; the wear of the gear is reflected in the tooth thickness, and the wear of the tooth thickness is one-sided wear, so the gear can be turned over 180 degrees before use, and when the gear end face wears, to ensure the gear end face and The gap of the pump cover is within the standard range, the end surface can be flattened, and the lubricating oil pump casing joint surface is ground. In comparison, the gear end face and the tooth top wear are relatively light, and perform many inspections in daily use.