As a key facility for building fire protection, indoor hydrants are bound to have various faults during long-term use. Timely troubleshooting and handling of these problems can ensure that they play their due role when a fire occurs. Among them, one of the most common problems is that the indoor hydrant valve does not produce water or the water output is very weak. This situation is often because the control valve is not fully opened or even closed by mistake, so that the water flow cannot pass smoothly; it may also be that sediment, rust and other debris have accumulated inside the pipe, blocking the water flow channel; there may also be problems with the water supply system, resulting in insufficient pressure. In this case, first check the nearby control valves to ensure that they are in a fully open state so that the water flow can flow smoothly. If the pipeline is blocked, you need to close the upstream valve first, then remove the valve or water hose interface, use a high-pressure water gun to reverse flush the pipeline, and clean up the debris inside. If the water supply pressure is not enough, you must contact the relevant maintenance personnel to check the secondary water supply equipment or the municipal pipe network, and restore the normal water supply pressure in time.
Another common fault is water leakage at the indoor hydrant, which not only wastes water resources, but also affects the normal use of the indoor hydrant. The cause of the water leakage may be that the sealing gasket of the plug mouth is aging, damaged or falling off, making the plug mouth unable to close tightly; it may also be that the connection between the plug body and the valve body is loose, and the sealing effect of the threaded interface is reduced; it may also be that the valve core is worn or deformed due to long-term use, resulting in poor closure. When dealing with this kind of fault, first close the control valve, then remove the plug mouth and replace the new sealing gasket. Pay attention to choosing the appropriate model and size to ensure the sealing effect. If the connection part is loose, tighten the thread with a wrench, and wrap it with raw tape to enhance the sealing performance if necessary. If the valve core is damaged, the indoor hydrant plug body needs to be replaced as a whole to ensure that the valve core and the valve body can fit tightly and no longer leak.
It is also common for water hoses and interfaces to have problems, such as broken water hoses or leaking interfaces. If the hose is in a humid environment for a long time or exposed to the sun, it is easy to age and crack. If the sealing ring of the interface is damaged or the interface itself is deformed, it will also cause water leakage. In addition, if the clamp of the interface is not tightened when connected, it will also cause water leakage. To solve these problems, it is necessary to check the condition of the hose regularly and replace it in time if it is damaged or moldy. In the case of interface leakage, replace the new sealing ring, ensure that the interface is not deformed, and buckle the clamp completely into the groove and tighten it when connecting. When storing the hose, avoid folding it too tightly. It is best to roll it into a disc shape and hang it or lay it flat, away from heat sources and corrosive substances.
The failure of the fire hose to spray normally is also a fault that needs attention. Sometimes it is because the nozzle of the water gun is blocked by debris or scale is formed inside, resulting in the inability to spray water smoothly; sometimes it is because the switch of the water gun fails, the valve core is stuck or the spring is damaged, affecting the control of the water flow; it may also be that the connection between the water gun and the water hose interface is loose, causing the water flow to leak at the connection and unable to form an effective spray. In these cases, first remove the nozzle of the water gun and clean the blockage inside with a thin wire or high-pressure water. If the switch fails, disassemble the switch, clean the valve core and apply grease. If the spring is broken, replace it with a new one. For loose connections, make sure that the water gun interface and the hose interface are fully engaged. If necessary, you can use wire to temporarily reinforce them, and then replace the appropriate interface.
If the indoor hydrant door cannot be opened normally, it will delay the time to use firefighting equipment and affect the efficiency of fire fighting. The cause of this situation may be rust or jamming of the door hinge, which is often due to long-term lack of lubrication or a relatively humid storage environment; it may also be that the door lock is damaged or stuck by foreign objects, such as the key is lost or dust accumulates in the lock core; it may also be that too many items are stacked in the box, squeezing the door and making it unable to open smoothly. When handling, add lubricating oil to the hinge, and then repeatedly open and close the door until it can rotate flexibly. If it is a problem with the door lock, disassemble the door lock, clean the debris in the lock core, and directly replace it with a new lock if it is seriously damaged. At the same time, the items in the box should be placed in a standardized manner, such as hoses, water guns, fire extinguishers, etc. They should not be stacked too much or too messy, and the door of the box should be fully opened.
If the fire pump connector cannot supply water normally, it will affect the water supply efficiency during external rescue. This may be because the interface type of the connector does not match the fire truck, such as the mixing of threaded interface and snap-on interface, which makes it impossible to connect smoothly; it may also be that the one-way valve inside the connector is stuck, so that the water flow cannot enter the pipe in the reverse direction; it may also be that there is air in the pipe, forming an air blockage, which hinders the flow of water. To solve these problems, first check the interface model of the connector to ensure that it is consistent with the interface of the fire truck and can be connected smoothly. If the one-way valve is stuck, disassemble the connector, clean the valve core of the one-way valve, check whether the valve disc can move flexibly, and replace the one-way valve if necessary. If there is air in the pipeline, open the drain valve of the connector, discharge the air inside, and then connect the fire truck for pressurized water supply.
Abnormal pointer of the pressure gauge, such as no pressure or unstable pressure, is also a fault that needs attention. This may be because the pressure gauge itself is damaged, the pointer is stuck or the spring tube in the gauge is broken, resulting in the inability to accurately display the pressure; it may also be that the pressure gauge connecting pipe is blocked, or the valve on the connecting pipe is not opened, so that the pressure cannot be transmitted to the pressure gauge; it may also be that the system's pressure stabilizing device is faulty, such as the pressure stabilizing pump frequently starts and stops, resulting in unstable pressure. To deal with this situation, you need to replace a new pressure gauge and calibrate it before installation to ensure that it can accurately display the pressure. If the connecting pipe is blocked or the valve is not open, clear the connecting pipe and open the relevant valve. If there is a problem with the pressure stabilizing device, check the control logic of the pressure stabilizing pump, adjust the parameters of the pressure switch, and repair or replace the pressure stabilizing pump when necessary.
