Views: 19 Author: Site Editor Publish Time: 2022-04-14 Origin: Site
Before carrying out the leak detection work of fire protection pipe, we must first determine one thing, that is, whether the fire protection pipe is really leaking, how to determine the water leakage of fire protection pipe?
The general fire fighting system usually relies on the high water tank to replenish the lost water in the fire fighting network and keep the pressure in the pipe, and also uses the pump room to replenish the water and pressurize in emergency.
We usually determine whether the fire protection pipeline is leaking from two aspects: 1, high water tank replenishment of water every day; 2, pump room pressure pipeline can not keep pressure.
Start the pressurized pump in the pump room, play 6-8 kg pressure to do the pressure test, and see the pressure retention situation. If the pressure retention can not, it means that the fire pipeline has a leak suspected.
After determining the leak of the fire protection pipe, start to investigate the location and direction of the pipe.
How to investigate the location and direction of the pipeline?
1、The owner needs to provide the distribution drawings of the fire protection pipe network; or be led by someone who is familiar with the situation of the pipe network.
2, in the case that the owner can not provide the distribution drawings of the fire protection network, you can find through the distribution of pipe wells, hydrants, and determine the location and direction of the pipeline (fire protection pipeline is generally distributed in the shape of a ring); 3, in the case that the above two do not have, such as metal pipes, you can use the pipeline special detection instrument "pipeline meter" To find the location of the pipeline direction.
1, in the row of pipe wells to see if there is no open water flow, there is open water flow, and can not confirm the source of water, you can close the main valve, observe whether the open water continues to flow + or not flow, open water no longer flow when the initial determination of the pipe well near the pipe leak suspected, and then start the next step of detection.
2. Observe the surrounding environment to see if there are signs of sinking ground, ground with obvious differences from the surrounding wetlands, cracked ground, etc. If you have the above phenomena, you can focus on investigating the nearby pipes.
3, use the pipeline water leak detector to detect the location of the valve, exposed hydrant to see if there is an abnormal leak sound.
Outdoor fire protection pipe water leak detector Product recommendation
The above can not be ranked to the suspected area of leakage, you can further test the pipeline for sectional pressure: fire pipeline from the pump room, close the first valve, observe the pressure change in the pressure gauge, the pressure is reduced to prove leakage, and vice versa, close the second valve, open the first valve, observe the pressure change in the pressure gauge. And so on, find the "suspected leakage area".
Find the "suspected leak area", the air pump pressure to 6 kg continuous pressure into the pipeline, the conditions can be higher pressure, with the pipeline water leak detector in the "census mode" mode along the ground above the pipe Walk while measuring detection, observe the spectrum bar changes and headphones inside the sound changes, once close to the top of the leak, headphones sound volume will become louder, and accompanied by a low, harsh sound or water tumbling, water beads bursting sound. The spectrum cursor signal on the screen will continue to go high and maintain a certain high level above, there will be no significant up and down. Because the leak is a continuous signal.
After the suspected leak is found, it is further verified with the "locate" mode in the water leak detector, using the locate mode for "fine measurement", in which the suspected leak is detected before and after the leak, and the instrument interface appears as thin and thick bars. The thin bar is the external noise generated, and the thick bar is the water leak noise. After the front and back detection, observe the point with the highest thick bar, which is the suspected leak.
Outdoor we find the suspected leak, the first hole punching verification, you can make more holes around more to determine whether there is open water, whether the ground is wet. There is water bubbling upward or clear water, below is the leak.