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The tank fire truck consists of a special device for the car chassis and its upper part. Foam fire trucks produced at home and abroad mostly use the second-class universal car chassis provided by vehicle manufacturers. Its special devices mainly include power take-off devices, water foam tanks, equipment boxes, pump rooms, fire pumps, vacuum pumps, and foam mixing devices. Its working principle is: through the power take-off device, the power of the chassis engine of the automobile is output, and a set of transmission device drives the fire pump to work. Through the fire pump, the foam proportion mixing device mixes the water and the foam according to a certain ratio, and then passes the fire monitor. And foam fire extinguisher spray fire. Therefore, it is required that the chassis of the vehicle must meet a certain load quality and engine power. At present, national standards have been formulated. The chassis is selected according to the national standard of GB6244-86 "General chassis series, type, basic parameters and technical requirements of fire engines". According to the industry standard GA39.5-92 "General Technical Conditions for Water Tank Fire Vehicles" The requirements of Appendix A require the power of the engine to meet its regulatory requirements.
At present, the domestic fire-fighting pumps equipped with foam fire trucks can be roughly divided into three categories: atmospheric pressure pumps (low pressure pumps), ie, single-stage centrifugal pumps, such as BS30, BS60, BS40, and R100 (import); Multi-pole centrifugal pump. Such as 20.10/20.40, 20.10/30.60, 20.10/35.70, KSP1000 (import), etc.; high and low pressure pumps, such as NH20.NH30 (import), 40.10/6.30, etc., fire pump configuration with the center and the rear of the points. 2.5 Pump Room
The pump room is the same as the equipment box, which is mostly a fully rigid frame welded structure. In addition to placing the fire pump, it is generally placed in the pump-related equipment space for firefighters to operate.
Domestic tank fire engines mostly use the power of the main vehicle engine. The power takeoff arrangement can take many forms. At present, medium and heavy-duty water tank fire trucks mostly use the sandwich type that places the power take-off device between the main clutch and the transmission. The power take-off (transmission front) and the drive shaft take-off (transmission rear) are two forms. The sandwich-type power take-off device is used to take out the power of the main engine and transmit it to the water pump through the transmission system to drive the water pump to operate. This can realize the double-acting function. Most of the current use of this form.
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