Commutation control method and device of serial oil cylinders and concrete pumping system
A control method and technology of connecting oil cylinders, applied in the field of control, can solve problems such as the inability of the oil cylinder to change direction, and achieve the effect of enhancing reliability and improving service life
Active Publication Date: 2015-10-14
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
[0009] The purpose of the present invention is to provide a simple and effective reversing control method, device and concrete pumping method for series oil cylinders, which can prevent oil cylinders from reversing due to abnormal volume of oil in the communication cavity or cause the phenomenon of cylinder holding when reversing. system
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[0029] The following describes the embodiments of the present invention in detail, but the present invention can be implemented in a variety of different ways defined and covered by the claims.
[0030] As the first aspect of the present invention, please refer to Figure 2 to Figure 5 , Provides a reversing control method of series cylinders, and more specifically, relates to a reversing control method of pumping cylinders of a piston concrete pump.
[0031] The reversing control method includes: acquiring the position signal of the first piston 2 of the first cylinder 1; acquiring the position signal of the second piston 6 of the second cylinder 5; when the first piston 2 reaches the first predetermined position 3 or the second predetermined position When any one of the conditions of the position 4 or the second piston 6 reaching the third predetermined position 7 and the fourth predetermined position 8 is met, the reversal of the tandem cylinder is triggered.
[0032] Among them,...
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The invention provides a series oil cylinder reversing control method and device and a concrete pumping system. The reversing control method includes the steps that position signals of a first piston of a first oil cylinder are acquired; position signals of a second piston of a second oil cylinder are acquired; when the first piston reaches a first preset position or a second preset position or when the second piston reaches a third preset position or a fourth preset position, series oil cylinders are triggered to reverse. By the adoption of the reversing control device, under the condition that no external hydraulic system pipeline is arranged, the volume of oil liquid in a communicating cavity is adjusted through U-shaped pipes of an existing oil cylinder, normal reversing can be still conducted when the volume of the oil liquid is not normal, adjustment of the volume of the oil liquid in the communicating cavity continues to a next period for conduction, the phenomenon that the pistons impact on the front ends or the rear ends of the oil cylinders due to the fact that the volume of the oil liquid in the communicating cavity is not normal is avoided, the service life of the oil cylinders is prolonged, and reliability of the system is improved.
Description
Technical field [0001] The present invention relates to the field of control, and more specifically, to a reversing control method, device and concrete pumping system of series-connected oil cylinders. Background technique [0002] When using two cylinders to work in series, the rod cavity or rodless cavity of the two cylinders is generally connected through a hydraulic pipeline or a valve block. When the pressure oil of the hydraulic system enters the rod cavity or rodless cavity of one of the cylinders to drive it to retract or extend (this cylinder is the active cylinder of the tandem cylinder), it then passes through the communication cavity (the rodless cavity is connected or there is rod The fluid oil connected to the cavity drives the other cylinder to extend or retract (this cylinder is the slave cylinder of the tandem cylinder). When one of the pistons reaches the reversing trigger position, the sensor sends a reversing signal to trigger the tandem cylinder Reversing. ...
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IPC IPC(8): F15B11/16F15B15/28
Inventor 李四中李仁玉万梁
Owner ZOOMLION HEAVY IND CO LTD