Function Description of Emergency Start Device for Fire Pump Machinery

1、 According to the Technical Specification for Fire Water Supply and Hydrant Systems GB50974-2014 According to Article 11.0.12 of the standard, this provision is mandatory (in bold). Pressure start, remote start, and hard wire start are all achieved through relays to automatically start the pump. If the relay and weak current signal fail and cannot automatically start the fire pump, the "mechanical emergency start device" set in the fire pump control cabinet should be relied on to directly start the fire pump. When the weak current signal and hard wire start relay fail and the secondary circuit and electrical faults in the fire pump control cabinet cannot make the fire pump start automatically or manually, in case of a fire emergency, this provision mandates that as long as the control circuit in the fire pump control cabinet is damaged under normal power supply conditions, the pump can be forcibly started directly to ensure timely firefighting. This "mechanical emergency start device It is directly transmitted through a mechanical interlocking device, To achieve a device that directly starts the fire pump. This device can be configured with two methods: star delta start and voltage reduction start. The starting handle of the "mechanical emergency starting device" is usually in a stopped state (with a lock), and must be operated by authorized management personnel in case of emergency fire (the mechanical emergency starting device is locked and is usually kept by authorized personnel, and the time from alarm to normal water supply of the fire pump is not more than 5 minutes, including the time from the control room to the pump room by the management personnel and the time from forced start to normal water supply of the fire pump).

1. The fire and sprinkler pump control cabinets have been installed, and a fire emergency start control cabinet (independent) can be added in front of the fire and sprinkler pump control cabinets. The power supply is led from the dual power cabinet, and the output of the "mechanical emergency start device" is connected to the output terminal inside the original control cabinet to achieve direct emergency start of the fire pump.

2. When the control cabinet for the fire pump and sprinkler pump adopts the star delta starting mode, two sets of "mechanical emergency starting devices" are used to start pump 1 # and pump 2 # respectively. In case of a fire alarm, either pump 1 # or pump 2 # can be started; When starting, press the handle 90 °. After starting, wait for the actual situation of the fire and have someone with management authority manually stop the pump (automatic pump stop or manual pump stop in case of fire alarm is not allowed).

3. When the control cabinets of the fire pump and sprinkler pump are in the depressurization starting mode, a set of "mechanical emergency starting devices" are used to start pump 1 # and pump 2 # respectively. In case of a fire alarm, either pump 1 # or pump 2 # can be started. When starting, pressing the handle 90 ° to the left will start pump 1 #, and pressing it 90 ° to the right will start pump 2 #, both of which are forced starts. After starting, the pump must be manually stopped by a person with management authority based on the actual situation of the fire (automatic pump stop or manual pump stop in case of a fire alarm is not allowed).

4. If both the user and the owner purchase our company's fire pump and sprinkler pump control cabinet, that is, the integrated fire pump and sprinkler pump control cabinet (with built-in "mechanical emergency start device") with the same function as above, in order to meet the requirements of the new regulations and standards, our company's products guarantee to pass the fire inspection.

Since the national introduction of the GB50974-2014 Technical Specification for Fire Water Supply and Hydrant Systems, the company has focused all personnel on learning the new specifications and requirements. In response to the new specifications and requirements, the company's technical department has concentrated all efforts and, after several months of hard work and countless experiments, researched and developed a high-level fire water tank flow switch (i.e. a fire pressure stabilizing equipment flow switch control direct start fire pump device) and a model of mechanical manual emergency start device for fire pumps.

The flow switch of the high-level fire water tank is installed on the water pipe of the high-level fire water tank. When the water level of the high-level fire water tank drops, the flow switch on the outlet pipe of the water tank senses the flow of water and converts it into an electrical signal, directly starting the fire water pump. This ensures the reliability of the fire water supply in case of a fire alarm.

The mechanical manual emergency starting device for fire pumps has two starting modes: star delta and self coupling pressure reduction. When the control circuit inside the fire pump control cabinet malfunctions and cannot automatically start the fire pump, immediate repair will encounter limitations in personnel quality and time. Fire alarm is also an emergency situation. This device can ensure that under normal power supply conditions, regardless of the circuit, it can be forcibly started, ensuring the timeliness of fire extinguishing.