Water hose fire truck

Abstract

The invention provides a water hose fire truck. The fire truck comprises a chassis, a hose storage compartment and a hose releasing and retracting device, an engine, a gearbox and driving wheels are arranged on the chassis, the fire truck further comprises a variable pump and a controller, a first output end of the engine is connected with an input end of the gearbox, an output end of the gearboxis connected with the driving wheels, and a second output end of the engine is connected with the variable pump through a power take-off shaft; or the output end of the engine is connected with the input end of the gearbox, a first output end of the gearbox is connected with the driving wheels, and a second output end of the gearbox is connected with the variable pump through a power take-off shaft; the controller is connected with the engine and the variable pump; the controller is used for controlling the speed of the fire truck and / or used for controlling discharge capacity and / or flow and / or pressure of the variable pump; the variable pump is connected with a drive mechanism of the hose releasing and retracting device. According to the fire truck, a transfer case is eliminated, the cost is reduced, the layout space is saved, and the hose storage capacity is improved. Meanwhile, there are fewer fault points, and chassis driving and hydraulic source uploading are stable.

Description

technical field [0001] The invention relates to the technical field of fire fighting equipment, and more specifically, to a hose fire truck. Background technique [0002] Hose fire truck is a dedicated fire truck, mainly used to provide rescue fire hose for the main fire truck, and after the rescue is over, the hose is recovered and stored in a standby state, which includes a drivable chassis, settings The power box and the tape storage box on the chassis are equipped with a tape laying mechanism on the tape storage box, a tape retracting device is installed slidingly above the tape laying mechanism, and a tape unwinding device is installed below the tape laying mechanism. During fire rescue, The operator opens the storage box, takes out the hose, and puts one end of the hose in the first working position (such as the fire water source supply point). With the walking of the hose fire truck, the hose in the storage box is laid to the second position along the road. 2. At the...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned hose fire fighting vehicle is provided with a transfer case for the power-taking mode of the engine, which is costly, and the transfer case takes up a large space, is difficult to arrange, and affects the belt storage capacity of the hose fire fighting

At the same time, because the hose fire truck needs to run at low speed and stably during the hose retraction stage, the driving power demand is small, while the power requirements of the top-mounted working devices such as the retractable and unwinding device, the belt unwinding device and the belt laying mechanism are large. During the rescue site, the oil pump (quantitative pump) does not need to work. Therefore, the pressure and flow of the oil pump change with the speed of the vehicle, which cannot provide a stable hydraulic source for the retractable belt device, and it is difficult to control the low speed of the hose fire truck. smooth ride

In addition, the clutch in the transfer case needs to be operated frequently, which is prone to failure and high maintenance cost

[0006] For the method of taking power from the broken shaft, a transfer case is still provided. At the same time, the transfer case needs to be installed in the middle of the chassis of the hose fire truck. There are many and long hydraulic pipes, which are complicated and costly. The moving box takes up a lot of space and is difficult to arrange, which also affects the storage capacity of the fire hose

At the same time, there is also the problem that the pressure and flow of the oil pump change with the change of vehicle speed, which cannot provide a stable hydraulic source for the retractable belt device, and it is also difficult to control the low-speed and stable running of the hose fire truck.

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