Hydraulic control device of ironing plate of paver

Abstract

The invention discloses a hydraulic control device of an ironing plate of a paver, and belongs to the technical field of pavers. The hydraulic control device comprises a hydraulic pump, a control combination valve bank, a left two-position two-way electromagnetic reversing valve, a right two-position two-way electromagnetic reversing valve, an ironing-plate left oil cylinder and an ironing-plate right oil cylinder, wherein the hydraulic pump is connected with the port P of the control combination valve bank, the port A1 of the control combination valve bank is connected with the rod cavity of the ironing-plate right oil cylinder, the port A2 of the control combination valve bank is connected with the rod cavity of the ironing-plate left oil cylinder, the port B of the control combination valve bank is respectively connected with the left two-position two-way electromagnetic reversing valve and the right two-position two-way electromagnetic reversing valve, the left two-position two-way electromagnetic reversing valve is connected with the rodless cavity of the ironing-plate left oil cylinder, the right two-position two-way electromagnetic reversing valve is connected with the rodless cavity of the ironing-plate right oil cylinder, and the port C of the control combination valve bank is connected with a pressure relay. The hydraulic control device has the beneficial effect of ensuring that the ironing plate in a suspension state descends slowly, so that the ironing plate is prevented from deformation or damage caused during rapid descending.

Description

technical field [0001] The invention relates to a hydraulic control device, in particular to a hydraulic control device for a paver screed, which belongs to the technical field of paver. Background technique [0002] The paver is mainly composed of several important systems. One end of the left and right leveling booms is hinged with the main machine through the traction point, and the other end is connected with the screed. The leveling arm and the screed are the working devices of the paver, through which the asphalt mixture is paved and initially compacted. The condition of the working device of the paver directly or indirectly affects the condition of the pavement, and the condition of the screed plays a decisive role in the quality of the road. Therefore, it is very important to design and maintain the screed of the paver. At present, there are certain defects in the existing paver screed lever control combination valve group. When the screed lever is in a suspended st...

AI Technical Summary

Problems solved by technology

The condition of the working device of the paver directly or indirectly affects the condition of the pavement, and the condition of the screed plays a decisive role in the quality of the road. Therefore, it is very important to design and maintain the screed of the paver. At present, there are certain defects in the existing paver screed lever control combination valve group. When the screed lever is in a suspended state, if it is misoperated, the screed will quickly fall to the ground due to its own gravity, thereby Cause the screed to be deformed or damaged, delay the construction period, and cause unnecessary economic losses

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