The causes of insufficient suction power of the suction truck

Everyone knows that the sewage suction truck is a new type of sanitation vehicle that collects, transports, and cleans sludge and sewage to avoid secondary pollution. It can suck and discharge by itself. At the same time, it works fast and has a large capacity. It is relatively convenient for transportation and more suitable for collecting and transporting feces, mud, and liquid substances such as crude oil. 

The sewage suction truck mainly performs suction operations by suction force. However, sometimes there may be situations with low suction force, which is a big headache for many users. So, what exactly are the causes of these situations? It uses a vacuum pump to evacuate the air in the tank to form a vacuum, thereby creating negative pressure and generating suction force by utilizing the pressure of the air.

If the suction pipes of the sewage suction truck are damaged or leak, or if there are leakage points in the vacuum exhaust pipes, then they will not be able to reach a vacuum state. As a result, they cannot generate sufficient suction force, and a phenomenon of insufficient suction will occur. Also, if the vacuum pumps of these vehicles are worn out, there are two common types of wear: one is the wear of the pump body, and the other is the wear of the scraper blades. The wear of the vacuum pump usually occurs gradually over time. If the pump body is severely worn out and the inner wall of the pump body is not smooth with grooves, then maintenance will not be effective and replacement is the only option. The wear of the scraper blades is also quite common. After the pipe pieces are worn out, they cannot tightly adhere to the inner wall of the suction pump to form a vacuum, and thus timely replacement of the scraper blades is necessary. 

Also, there could be problems with the valves of the suction vehicle's pipelines being closed improperly or not fully opened. In some cases, it might even be that the suction pipes are clogged. At this point, even if the vacuum pump generates a sufficient suction force, it will be blocked by the valves or the pipelines, preventing the sewage from flowing smoothly into the suction tanks. This would create the illusion of insufficient suction. Another aspect is that the exhaust pipe is not unobstructed. Generally, the gas expelled from the tank, passes through the overflow valve exhaust pipe, the water vapor separator, and then along the pipeline into the vacuum pump for removal. The gas that needs to be removed in the vacuum pump is forcibly squeezed out and then discharged outside the vehicle. If there is any blockage in these parts, it will also cause poor exhaust, thereby resulting in insufficient suction.