【 Weak current College 】 fire hydrant, outdoor hydrant use method

Fire hydrant is installed in the fire water supply pipe network, mainly for the use of firefighting. Min ground and underground. Ground fire hydrant for higher temperature, the water supply connector mounted above the pavement on a vertical cylinder. Underground fire hydrant and broadly similar underground fire hydrant structure, mainly by the pipe, valve, valve seat, valve one, drainage valve, flange nozzle, valve stem, ontology, interfaces, and cardboard cover, etc.

Underground fire hydrant specifications
Product specifications: SA100/65-1.6, SA65/65-1.6
The nominal passes the diameter (mm): DN100
Nominal pressure (MPa): 1.6
Strength test pressure (MPa): 2.4
Opening height: 50mm
Suitable medium: water, foam cleaning fluid mixture.

Outdoor hydrant use method
Because of the underground fire hydrant, covered with thick shaft cover is opened by two people with iron specialized tools brought well cover, exposing the underground fire hydrant and switch with extended wrench into underground, loosen the valve, connected to the mains, water fire extinguishing fire.

Installation design
First, the underground fire hydrant installation design. Underground fire hydrant design installation at underground Interior, fire hydrant outlet altitudes and outlet flat position on water is convenient is the key to draw water from the Fire Department, then bring the outlet from the ground level should be controlled at about, consider maintenance 30cm, convenience outlet flat location should be close to the mouth of the River. If the fire hydrant wells in deep, fire hydrant connection risers is too long and should be well within the standpipe be fixed to ensure that the safety in use.
Second, for super high-rise building nearby surrounding the design of outdoor hydrant, consideration should be given to the fire hydrant and super high-rise building of pump adapter spacing, so that once the super high-rise building fire, the fire department can in the shortest possible distance water and pump-belt.
Third, due to the planning and other factors, often have the control valves and fire well function as a set of well known, habits, seems saving planning location, and a dual-function well, but it also brings the management of the disease. First, once the fire hydrant maintenance you need closing valve normal supply and the impact on downstream. For the same reason maintenance when closing valve downstream piping and hydrants to normal use, it's normal usage of hydrants will reduce. This is "breaking out of the fire hydrant at" using the management is very negative. Second, because the wells have a dual function, which covers how to fire well cover or valve covers and bring management using confusion, design should, as far as possible, avoid this set of wells.

Fire hydrant management
1. fire hydrants as one of the network, its subsidiary facilities management should be equivalent to other facilities management, should establish specialized management team, dedicated management. Once you have found the fire hydrant failure should be assimilated to the pipe network to timely processing of snatching explosion. In addition it should also be drawn up on the fire hydrant maintenance plan of the cycle, the implementation of the maintenance of the measures on a regular basis. -Ground hydrants should also be regularly to ensure that the paint coating. Periodically fire hydrant for drainage operation check, on the one hand, to determine whether a fire hydrant, and closing effective pressure water meets the normal category. On the other hand in the water distribution network is also played by fire hydrant drainage improvements to ensure that water. In the implementation of a fire hydrant and drainage work, to ensure that drainage effect and prevent network quality secondary pollution, drainage hose received should be taken when drained to rain water wells. The quality of the drainage of water sample testing field, mainly for the determination of turbidity, chlorine, water quality indicators, in addition to the drainage pipe pressure measurement records accumulated net service pressure parameters for network operation for the parameter.
Through the fire hydrant water drainage improvements to ensure that the fire hydrant security operation is necessary, but at the same time to the problems caused by water supply companies are water supply companies tap water production and sales increase correspondingly poor, how economic reasonable scientific drainage management is the water supply enterprises should examine the issue of worth.
According to the setting of a fire hydrant, fire hydrant field emission conditions as well as the pipeline material conditions and regional water situation in the different levels of water management, context-specific implementation of minutes cycle time sharing and focus on emissions, and seek the Holy blissful martyr time, at the time of discharge pressure, etc., in order to facilitate the calculation of displacement of lecturers and accurate, with individual water supply enterprises on each hydrant with a meter metering, abroad have similar practices. But after installing water meters with increased management complexity, this practice should be considered carefully.
2. fire hydrant wells with other facilities as well, often likely to be faced, retaining, buried, pressure, in addition to step up inspections, it should also be made for the fire Statute of publicity and guidance. In particular, should work closely with the local fire department, and rely on the Fire Department of the execution of the maintenance and management of good fire-fighting facilities. Fire departments in the area of fire management, water supply enterprises fire hydrant maintenance management should also Fire Department of regional management, common management, help with less effort. Chengdu water Division fire well cover on spray rinse yellow paint be alert, facilitates the search for maintenance, but also to stand out, to help fire departments use the method value line extension. Of course there are conditions should also be fire well cover brushing into fluorescence, reflective markers to find at night.
3. fire hydrants as one of the water supply network facilities, to establish and improve their profile information is the key to fire hydrant manage their archives should include single cards, maintenance records, the daily inspection records, etc. Conditional should establish fire hydrant management information computer system, improving the management of the fire hydrant.

Outdoor fire hydrants decorated fire requirements
First, the setting of the basic requirements. Outdoor hydrant set installation should significantly easier to find, easy outlet operations, underground fire hydrant should also be on the ground in the vicinity of clear fixed flag. Aboveground fire hydrant chosen for the warm surface installation, choose the climate coldness ground basement.
Second, the number of building outdoor fire hydrant. The number of outdoor hydrant should be protection RADIUS, flow and outdoor fire integrated calculation to determine the dosage, each flow at 10 – 15L/5 litres. ForHigh-rise building, 40m range municipal hydrants shall be taken into account in the amount of building fire hydrant; on multi-story building, municipal fire protection RADIUS 150mm, such as fire-fighting water consumption is not greater than 15L/s, is not located outside the building of a fire hydrant.
3. municipal and residential outdoor fire suppression. Outdoor hydrant should lay along the road, the road width exceeding 60m should set up, on both sides and it is near the crossroads. Layout of interval should not be greater than the distance from the road edge 120m should not exceed 2m, distance wall should not be less than the distance to the high-rise building 5m wall should not be greater than the distance 40m, should not be greater than the General exterior 150m.
IV. industrial enterprises in outdoor hydrant setting requirements. For process installations, or tank farm, you should set along the device around should not be greater than the fire hydrant, spacing, such as device 60m is greater than the width, in process of 120m device local road edge increases to fire hydrants, fire hydrant for fire protection design diameter should 150mm. For a, b, c liquid or liquefied gas tank farm, fire hydrant should be changed in banks, and from the tank wall 15m range fire hydrant, should not be included in the calculation of the amount of storage you can use.