What is a closed sprinkler head for fire equipment?

1. Introduction of closed sprinkler head
The enclosed sprinkler head can be divided into three types: fusible alloy type, bimetal type and glass ball type. The sprinkler heads used in high-rise civil buildings, conference rooms and hotels are mostly glass ball type. This type of sprinkler head is composed of water spout and glass ball support. The sprinkler head is arranged under the ceiling of the room and is connected with the branch pipe.

2. The use of closed sprinkler head precautions
The protection area of ​​each sprinkler head of fire equipment within the specified height is about 10 square meters. This glass-type automatic sprinkler head can form an automatic fire extinguishing system with fire-fighting pipe network, automatic alarm valve and other fire-fighting equipment. It is the main component in the system. It plays an important role in detecting fire, starting water flow indicator and extinguishing early fire.

3. Working principle of closed sprinkler head
Under normal circumstances, the fire-fighting equipment is in a closed state. In the event of a fire, the opening of the water spray is controlled by the temperature-sensitive component (liquid-filled glass ball). When the temperature is 227℃, 260℃), the liquid in the ball expands, which increases the internal pressure. The glass ball bursts, the gasket is detached, and pressure water is sprayed. Send a signal to start the spray pump to the spray pump control device for the electrical signal to ensure that water is sprayed from the spray head.

At the same time, the flowing fire water makes the electric contact of the water flow indicator at the branch of the main pipeline act, and turns on the delay circuit (delay 20-30). Through the relay contact, a sound and light signal is sent to the control room to identify the fire area .

The closed sprinkler is characterized by novel structure, strong corrosion resistance, sensitive action, stable performance, and is conducive to serial production. It is widely used in fire protection engineering.