A pump start method for an electronically controlled reversing pump truck

Abstract

The invention discloses a method for starting a pump for an electronically controlled reversing pump truck, which includes: first swinging the cylinder to try to swing to the left, and after 200 milliseconds, the pump cylinder tries to move to the left; after that, if at any time within two seconds, the first approach switch or The third proximity switch senses the signal, and the swing cylinder immediately swings to the right. If the second proximity switch or the fourth proximity switch senses the signal at any time within two seconds, the pump cylinder continues to move left. If the first proximity switch is at any time within two seconds The switch or the third proximity switch does not sense the signal. When the two seconds are over, the swing cylinder swings to the right. After 200 milliseconds, the pump cylinder moves to the right. When the second proximity switch or the fourth proximity switch senses the signal, the swing cylinder swings to the left. After 200 milliseconds, the pump cylinder moves to the left, and when the first proximity switch or the third proximity switch senses a signal, the swing cylinder swings to the right. Then when the positive pump is started, no matter where the piston head is, even if it is out of the range of the proximity switch, the pump can be started normally, and the pump can be avoided when the pump is started.

Description

technical field [0001] The invention relates to the technical field of pump starting, in particular to a pump starting method for an electronically controlled reversing pump truck. Background technique [0002] In the traditional electric control reversing pump truck, when the metal sleeve of the piston head senses the proximity switch, the swing cylinder and the main oil cylinder switch direction, but when the pump truck is in the waiting state, the piston may be displaced under the action of concrete load, thus The metal sleeve of the piston head runs out of the stroke range of the normal pump, so when the feed is over and the positive pump is started, the pump will be held back. [0003] Specifically, in the early electronically controlled reversing pump trucks, two proximity switches were installed on the main oil cylinder near the side of the water washing tank. The logic of starting the positive pump is as follows: the right proximity switch senses the signal, the left...

AI Technical Summary

Problems solved by technology

[0005] However, when the pump is stopped, if the piston is displaced under load, the metal sleeve of the proximity switch on the piston head goes out of the normal stroke range of the pump. In this case, if the positive pump is started again, the pump will inevitably occur Phenomenon

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