The protection device for the pressure of the mixer truck and its water tank and gas storage cylinder

Abstract

The invention provides a device for protecting a water tank and the pressure in an air cylinder of mixer. The device comprises a multi-way valve, a pressure sensor, a vehicle state acquisition unit, a controller and a reversing valve. The multi-way valve is installed at one end of the air cylinder of the mixer; the pressure sensor is used for acquiring pressure data of the air cylinder through the multi-way valve; the vehicle state acquisition unit is used for acquiring speed data of the mixer; the controller is used for receiving the pressure data and the vehicle state data, judging whether the mixer is in a static state or running state according to the vehicle state data, comparing the pressure data with a pressure threshold, and generating a control signal according to the comparison judgment result; the reversing valve is used for forming a loop of the air cylinder and the reversing valve when the mixer is in the running state, to stop pressurizing the water tank. The invention also provides the mixer. The water tank is not pressurized when the mixer is in the running state, thus air pressure in the air cylinder of a chassis can meet the braking pressure strength, so that the requirement for protecting the braking pressure of the air cylinder and the requirement for pressurizing and depressurizing of the water tank are met.

Description

technical field [0001] The invention relates to the technical field of mixer truck control, in particular to a mixer truck and a pressure protection device for a water tank and a gas storage cylinder of the mixer truck. Background technique [0002] The mixer truck in the related art realizes the pressurization of the water tank, all of which directly take the gas from the gas storage bottle of the chassis, or take the gas through a multi-way valve, and the gas enters the water tank through the one-way valve and the safety valve to achieve The purpose of pressurizing the tank. Such as figure 1 As shown, other in the gas cylinder 5 ' enters the water tank 9 ' through the one-way valve 6 ' and the safety valve 7 ', and the pressure gauge 8 ' can detect the pressure of the water tank 9 '. [0003] However, the above-mentioned device can only complete the step of pressurizing the water tank 9', and cannot ensure that the mixer truck does not pressurize the water tank 9' when i...

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned device can only complete the step of pressurizing the water tank 9', and cannot ensure that the mixer truck does not pressurize the water tank 9' when it is running, and cannot ensure that the pressure of the gas storage cylinder 5' can meet the braking requirements. need

Moreover, during the operation of the mixer truck, it often happens that after the operator cleans the mixer truck, the reversing valve is not placed in the position where it should be, so that the water tank 9' is always in a pressurized state, resulting in explosion and gas storage in the water tank 9'. Insufficient brake air pressure of the bottle, etc.

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