What Is a Hydrant Wrench?

Fire hydrant, formally called fire hydrant, is a fixed fire-fighting facility whose main role is to control combustible materials, isolate combustion-supporting materials, and eliminate sources of ignition. There are indoor hydrants and outdoor hydrants.

fire hydrant

Fire hydrant, formally called fire hydrant, is a fixed fire protection facility whose main function is to control

1. Open the fire hydrant door and press the internal pump start alarm button (the button is to start the fire pump and alarm ^[1]

1. Open the water bag mouth connection switch of the underground fire hydrant with a wrench.

2.

Indoor fire hydrant

Manually starting the pump is to directly press the start pump button in the hydrant box. Generally, there should be a test hydrant on the top of the design. With a pressure gauge, the pressure value should be 0.15MPa 0.2MPa. If this is not designed, find a fire hydrant that is furthest from the pump and see how far the spray is. Generally, it is no problem to fill the water column longer than 10m, and less than 7m. Spray at an angle of 45 degrees.

I. Fire Hydrant Equipment. Composed of water hydrant with fire hose.

Temporary high-pressure fire-fighting water supply system means that the pressure in the pipeline is usually low, and its water pressure and flow cannot meet the needs of the most unfavourable point. When a fire alarm occurs, the fire pump is automatically started, and the roof fire-fighting water tank, air pressure tank and other voltage-stabilizing facilities give the system Make up the water, make the system high pressure, and realize fire suppression.

Indoor normal high pressure fire hydrant system

Normal high pressure fire hydrant system means that sufficient pressure and fire water are always maintained in the pipe network. Generally, there is no fire hydrant start pump button. It is not necessary to use a fire truck or other mobile water pumps to pressurize the fire during the fire. The water is directly connected to the fire hydrant. The belt can meet the fire extinguishing requirements of the water gun.

It is generally believed that as long as

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1. The design of fire hydrant installation should be considered at the intersection of streets. In order to ensure the eye-catching position without affecting pedestrians and driving, at the same time, maintenance and daily drainage are considered convenient. Such as sidewalks along the street. By the side of the sidewalk trees, the rain drains. Some ground-type hydrants cannot be drained because they were buried and blocked by soil after the initial installation and subsequent changes in the elevation of the pavement, which caused the water quality in the hydrant cavity to change, resulting in rust, such as screw rods, and affecting the water quality of the pipe network. Life of the hydrant. "High gauge" 7.2.2 stipulates: "The number of outdoor fire hydrants installed shall be determined by calculation based on the amount of water used." Practice indicates that the number of water pump couplings must be considered when designing outdoor fire hydrants. One outdoor fire hydrant corresponds to one water pump. Device. Some designers consider the water pump coupler, add the number of room fire hydrants calculated according to the outdoor fire water consumption and the number of outdoor fire hydrants required by the water pump coupler to design outdoor fire hydrants. The number of installations is too large, which is not realistic and unreasonable. . "High Regulation" 7.3.6 stipulates: "The number of outdoor fire hydrants shall be calculated and determined according to the requirements of High Regulation 7.2.2 for outdoor fire hydrants. The water consumption of each fire hydrant shall be 10 L / s 15 L / s. "To facilitate the use of fire trucks,

1. When the building is within 150m of the municipal fire hydrant protection radius and the fire water consumption does not exceed 15L / s, no outdoor fire hydrant may be provided.

2. Outdoor fire hydrants should be evenly distributed around high-rise buildings and should not be concentrated on one side of the building.

3. The outdoor fire hydrant of civil air defense engineering should not be less than 5m away from the entrance of civil air defense engineering.

4. The outdoor fire hydrants in the parking lot should be installed along the perimeter of the parking lot, and the distance from the nearest row of cars should not be less than 7m, and it should not be less than 15m from the gas station or depot.

5. The outdoor fire hydrant should be set in a place convenient for fire trucks.

6. Outdoor fire hydrants should be above ground. When underground fire hydrants are used, they should be clearly marked. Underground type is used in cold areas, and above ground type should be used in non-cold areas. Above ground type can be used in anti-collision condition.

7. Outdoor floor fire hydrants should have a diameter of 150mm or 100mm and two diameters of 65mm. Outdoor underground fire hydrants shall have one each with a diameter of 100 and 65 mm.

8. The protection radius of outdoor fire hydrants should not exceed 150m, and the distance should not exceed 120m.

9. The distance between outdoor fire hydrant and roadside should not exceed 2m, and it should not be less than 5m from the exterior wall of the house.

Fire hydrant: It is connected to the fire water supply system or water supply system, and is equipped with on-off valves and one or more outlets that are used to supply fire hoses or fire trucks. Fire hydrants are divided into indoor and outdoor fire hydrants.

When the indoor and outdoor fire hydrants are directly supplied by the municipal water supply pipe and an independent fire water supply system is used, a backflow preventer should be installed at the interface with the municipal water supply pipe network.

The filling time of the dry hydrant system should not be greater than 5min.

The number of outdoor fire hydrants should be determined based on comprehensive calculations based on the protection radius of fire hydrants and the water consumption of outdoor fire hydrants. The output of each outdoor fire hydrant should be calculated at 15 L / s, and the municipal fire hydrants within a distance of 5 to 40 m from the protection object , Can be included in the number of outdoor fire hydrants.

Outdoor fire hydrants should be evenly distributed around high-rise buildings, and should not be concentrated on one side of the building. The number of outdoor fire hydrants on the side of high-rise buildings should not be less than two.

An outdoor fire hydrant shall be installed in the household pipe from the municipal water supply pipe network before the backflow preventer.

The valves of the fire water supply network are divided into several independent sections, and the number of fire hydrants in each section should not exceed five.

The distance between the outdoor fire hydrant and the fire pump coupling should not be less than 15m, and it should not be more than 40m.

Fire Hydrant Water Alarm Device

product description

Fire Hydrant Water Alarm Device

1. Without changing the appearance of the fire hydrant, directly replace the original 100mm outlet cap.

2. The alarm information and data are transmitted to the monitoring center via GPRS / CDMA.

The main function

Cover opening alarm, damage alarm, water outlet alarm, knock down alarm, pressure monitoring.

Monitoring principle

1. When someone uses water at the 100mm water outlet, when the hydrant anti-theft alarm device is turned, the position of the tilt switch in the device is deviated and turned on, the alarm device is triggered, and the alarm information is transmitted to the monitoring center via GPRS to achieve timely alarm.

2. When someone uses water at the 65mm water outlet, the water pressure in the fire hydrant triggers the micro-switch in the fire hydrant alarm device to close after the water is discharged. The alarm information is transmitted to the monitoring center via GPRS to realize the alarm.

3. The hydrant anti-theft water alarm device is equipped with a Bluetooth communication function, which enables wireless maintenance of it through a mobile APP, and the mobile APP can view the alarm information at any time and determine the position of the hydrant.

Expanded application of anti-theft water alarm device

1. Fire hydrant anti-theft alarm device is also equipped with 433MHz wireless communication function, which is used to expand the monitoring of fire pipeline pressure.

2. A 433MHz micro power consumption measurement and control terminal is installed in the table well to collect the pressure of the pipeline, and transmit the pressure data to the fire hydrant anti-theft alarm device, and then periodically to the centralized control center via GPRS.