Electric control reversing pump truck pump starting method

Abstract

The invention discloses an electric control reversing pump truck pump starting method which includes that first a swing cylinder tries to swing leftwards, and a pump cylinder tries to advance leftwards after 200 milliseconds. If a first approach switch or a third approach switch senses a signal at any time in the next two seconds, the swing cylinder swings rightwards immediately; if a second approach switch or a fourth approach switch senses the signal at any time in the next two seconds, the pump cylinder continues advancing leftwards; if the first approach switch or the third approach switch does not sense the signal at any time within two seconds, the swing cylinder swings rightwards after two seconds, and the pump cylinder advances rightwards after 200 milliseconds; when the second approach switch or the fourth approach senses the signal, the swing cylinder swings leftwards, and the pump cylinder advances leftwards after 200 milliseconds; when the first approach switch or the third approach switch senses the signal, the swing cylinder swings rightwards. When a pump is started, normal pump starting can be achieved wherever a piston head is and can be achieved even the piston head is not in the range of the approach switches, and pump blocking is avoided in the pump starting process.

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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