As one of the components of the automatic sprinkler system, the terminal water test device has ten pointsimportant role and significance。According to GB 50084-2017 "Code for the Design of Automatic Sprinkler Systems" 65.1. Each wet alarm valve group is controlledThe most unfavorable point is the sprinklerThe end water test device should be set up;According to GB 50261-2017 "Code for Construction and Acceptance of Automatic Sprinkler Systems" 90.6 All terminal test valves of the system should be carried out once a quarterWater discharge testCheck whether the starting function of the system (pump) is normal, and the fire pump should be started within 5min after the end water test valve is openedThe hydrostatic pressure at the end of the sprinkler system is not less than 005mpa。
The terminal water test device is generally divided into:Traditional(Manual control of the water test valve) withIntelligent(Automatic control of the water test valve). The main components of the traditional type: water test pressure gauge, water test valve, water test joint and drainage facilities;The main components of the intelligent type: water test pressure gauge, intelligent water test device and drainage facilities.
Schematic diagram of the traditional terminal water test device.
Schematic diagram of the intelligent terminal water test device.
The intelligent terminal water test device is a product that has been developed and used in recent years with the popularization and promotion of digitalization, and it is mainly used in automated high-bay warehouses, high-rise buildings and other important places or building units that are usually inconvenient to conduct water discharge tests on site (safety considerations) or need to monitor the terminal pressure. Its advantages: 1) The hydrostatic pressure at the most unfavorable point of the pipe network can be monitored in the fire control room;2) The water discharge test can be carried out in the monitoring room through the end water test valve controlled by the main machine, and the working pressure and flow rate of the most unfavorable point of the pipe network can be monitoredIts disadvantages: 1) the control signal of the end water test valve or water test device should be transmitted to the main engine of the fire monitoring room, due to the wide distribution area of the water test valve or water test device involved (each fire prevention area, each floor, each wet alarm valve corresponding to the most unfavorable point), for the layout of the communication cable, voltage requirements are high;2) The end of the water test device is equipped with an electric water test valve and a pressure sensor, which has high requirements for the water quality of the pipe network, if the water quality is not cleaned up in time, it will lead to the electric water test valve is not tightly closed, the water of the pipe network leaks into the drainage funnel, the pressure of the pipe network is reduced, and the pressure stabilizer pump is started frequentlyThere is an error in the pressure sensor, and there is an abnormality in the pressure monitoring;3) The cost of the intelligent terminal water test device is higher than that of the traditional water test device.
Structural diagram of intelligent terminal water testing device.
Therefore, for the construction unit considering the use of intelligent terminal water test device in the automatic sprinkler system, according to the author's experience, it is recommended that:Except for special needs for on-site safety——It is inconvenient for maintenance personnel to go to the site for the terminal water test device testTry to use a conventional terminal water test device