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Pump truck output control circuit

A technology for controlling circuits and pump trucks, applied in electrical program control, program control in sequence/logic controllers, etc., can solve problems such as pump trucks not working properly, and achieve the effect of improving work reliability

Inactive Publication Date: 2010-01-13
ANHUI XINGMA AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional pump truck displacement control generally uses one displacement drive channel, as long as this channel fails, the pump truck will not work normally

Method used

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  • Pump truck output control circuit

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Experimental program
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Embodiment Construction

[0007] Such as figure 1 As shown, the PLC of this circuit adopts the Siemens small-scale programmable logic controller CPU224 with a program, the PLC terminals L+, 1L+, 2L+ are connected to the battery positive pole B+ through the insurance F, and the PLC terminals M, 1M, 2M are connected to the battery negative pole B- , the PLC output terminal Q0.1 is the pulse width modulation (PWM) output terminal of the control displacement channel, and the PLC output terminals Q0.6, Q0.7, Q1.0, Q1.1 are the four outputs of the removal fault displacement channel Terminals are respectively connected to the negative pole B- of the battery through the coils of four relays K1, K2, K3, and K4; the switch SB is a displacement adjustment button switch, and the upper ends of the two contacts are connected to the battery +24V power supply B+ pole through the insurance F. The lower ends of the contacts are respectively connected to the input terminals I0.6 and I0.7 of the PLC, the input terminal I0...

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PUM

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Abstract

The invention relates to a pump truck output control circuit comprising a programmable logic controller CPU 224 on which a program is written, four isolated gate field effect transistors N1, N2, N3 and N4, four relays K1, K2, K3 and K4, an SB toggle switch, eight divider resistors R1, R2, R3, R4, R5, R6, R7 and R8, a proportion electromagnetic valve DT, an insurance F and a positive 24V battery. The pump truck output control circuit adopts four output driving channels and a diagnosing and cutting circuit of an output fault channel, even under the condition that the three output driving channels have faults, a pump truck can still normally work, thereby greatly increasing the work reliability.

Description

technical field [0001] The invention relates to a vehicle control circuit. Background technique [0002] The displacement control of the pump truck is based on the forward pump and the reverse pump, by changing the average current of the proportional solenoid valve on the main variable pump, thereby changing the flow rate of the main variable pump, that is, changing the displacement of the pump truck. Traditional pump truck displacement control generally uses one displacement drive channel, as long as this channel fails, the pump truck will not work normally. Contents of the invention [0003] The object of the present invention is to provide a pump truck displacement control circuit with high reliability and four displacement driving channels. [0004] The technical scheme of the present invention is realized like this: a kind of pump truck displacement control circuit, it is characterized in that: it comprises the Siemens small-scale programmable logic controller PLC th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
Inventor 邵恩奇桑世保阮昆高泓
Owner ANHUI XINGMA AUTOMOBILE