Power take-off one-button control system

Abstract

The invention discloses a one-key control system for a power takeoff device, which belongs to the technical field of fire-fighting vehicle control systems. The one-key control system is characterized in that: the gear-disengagement and engagement output ports of a one-key ganged switch are used for establishing a gear-disengagement and engagement control circuit together with a gear-engagement and disengagement electromagnetic valve of the power takeoff device and a cylinder of the power takeoff device, and for establishing a clutch downlink control circuit together with a clutch downlink electromagnetic valve, a clutch downlink cylinder and a clutch exhaust electromagnetic valve, so that mechanical automatic operation of a series of actions such as opening and closing of a water inlet valve, treading and releasing of a clutch pedal, gear-disengagement and engagement of the power takeoff device and the like can be simulated manually, and the aims of accurately controlling and operating a water pump of a fire-fighting vehicle with one key are fulfilled; the one-key control system has the characteristics of convenience and rapidness for operating, stable system, reliable work, high safety, high practicability and the like; gear engagement of the power takeoff device can be controlled and running of a fire control water pump can be started up without four seconds, the water discharging time can be advanced by 2-3 minutes, previous time is won for fire extinguishing and rescuing, and the application efficiency of fire-fighting vehicle equipment is increased; and meanwhile, the one-key control system has the characteristics of easiness for installing, low comprehensive cost, long service life, and the like.

Description

technical field [0001] The invention belongs to the technical field of fire truck control systems, and in particular relates to a one-button control system for a power take-off suitable for the operation control of a fire pump mounted on a fire truck. Background technique [0002] The power take-off is a set of transmission gears, which is a separate gear in the gearbox of the fire truck. When this gear is engaged, the water pump of the fire truck can run as soon as the gas is added. The extra power required by the water pump is through the power take-off Obtained from the engine, the basic operating procedure of the water pump operating system of the fire fighting vehicle is to start the fire truck, step on the clutch, hang up the power take-off of the water pump, let go of the clutch, and the water pump works; the fire truck adopts the structure of the rear water pump system , the water pump control panel is set at the rear of the vehicle, but the power take-off of the fir...

AI Technical Summary

Problems solved by technology

[0002] The power take-off is a set of transmission gears, which is a separate gear in the gearbox of the fire truck. When this gear is engaged, the water pump of the fire truck can run as soon as the gas is added. The extra power required by the water pump is through the power take-off Obtained from the engine, the basic operating procedure of the water pump operating system of the fire fighting vehicle is to start the fire truck, step on the clutch, hang up the power take-off of the water pump, let go of the clutch, and the water pump works; the fire truck adopts the structure of the rear water pump system , the water pump control panel is set at the rear of the vehicle, but the power take-off of the fire truck needs to be manually operated in the cab. Pedal, so that the clutch is separated, so as to realize the hang-off of the power take-off and make the fire pump run or stop. The valve from the press and the tank to the pump is returned to the cab of the vehicle to combine with the water pump, then get off the vehicle and go to the rear operation panel, increase the throttle until the double pointer pressure gauge reaches 0.85Mpa, then the water can be released to extinguish the fire, and the operation is done by running back and forth , will delay the time of the water in front, and also cause a lot of inconvenience to the driver, the fire is changing rapidly, the time of the fire is measured in seconds, the water can be released one second earlier, and the property or life saved is immeasurable. The cumbersome operation process of the traditional operation mode may delay the best practice of fire fighting and rescue, and reduce the ability to deal with accidents to a certain extent

In addition, the operation mode of the existing water pump operating system brings many hidden dangers to the normal use of the fire pump. The dry grinding of the water pump will cause the water pump to be abnormally damaged. When the water pump is working, the valve from the water tank to the water pump is in a closed state. The impact effect will cause abnormal damage to the impeller by the water, and the sudden water flow into the pump will form an instantaneous high pressure under the instantaneous driving of the high-speed rotating impeller, which will form a strong water hammer force on the stuffy cover of each pipe of the pump, and the pipes will The stuffy cover will be damaged due to the water hammer force, and even the pipeline will be broken and the pressure gauge will be damaged. Not only that, the sudden water flow into the pump will reduce the impeller rotation to the minimum in the shortest time, and the engine and transmission of the vehicle will be damaged. The instantaneous change of the tank from no-load to load will cause abnormal wear of the gearbox gear and abnormal engine operating conditions. The traditional operation mode is likely to cause damage to the main body and auxiliary pipelines of the fire-fighting vehicle water pump, and there are also differences in the engine and gearbox of the vehicle. degree of damage

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