Prestressed ironing plate

Abstract

The invention provides a prestressed ironing plate. The left side of an ironing plate body is connected with a first ironing plate oil cylinder through a left side supporting rod; the right side of the ironing plate body is connected with a second ironing plate oil cylinder through a right side supporting rod; a third ironing plate oil cylinder is connected with the middle part of the ironing plate body through middle part supporting rods; the left side supporting rod comprises a left side supporting rod inner pipe and a left side supporting rod outer pipe arranged outside the left side supporting rod inner pipe in a sleeving manner, and the left side supporting rod inner pipe and the left side supporting rod outer pipe can relatively slide in an axial direction; a left side supporting rod elastic device is arranged in the left side supporting rod inner pipe; a left side supporting rod button is connected to the top end of the left side supporting rod elastic device; and left side supporting rod positioning holes matched with the left side supporting rod button are radially distributed in the left side supporting rod outer pipe. The prestressed ironing plate disclosed by the invention has the beneficial effects that during paving operation, the normal flat state of the ironing plate is guaranteed, and the paving planeness of a road surface is effectively improved.

Description

technical field [0001] The invention relates to the field of road surface operation engineering, in particular to a prestressed screed. Background technique [0002] As the core working device of the asphalt paver, the screed directly determines the paving quality and performance of the machine. At present, domestic and foreign asphalt paver screeds all adopt a rectangular box structure welded by steel plates, and the bottom is fixed with a wear-resistant bottom plate by bolts. When paving hot mix asphalt mixture, the base plate of the paver screed will be heated to a high temperature above 130°C, while the upper part of the screed box is at ambient temperature. Due to the large temperature difference between the upper and lower sides of the screed box structure, the expansion of the lower part of the screed at high temperature is much larger than the expansion of the upper part of the screed at low temperature, which leads to the phenomenon of upturning at both ends of the...

AI Technical Summary

Problems solved by technology

For the increase of the paving width of the paver and the construction of high-temperature paving materials such as modified asphalt mixture, the thermal deformation at both ends of the screed will increase significantly

The existing thermal deformation suppression method of the screed is mainly to compensate the thermal deformation through the reserved thermal deformation of the screed box, which needs to change the structural size of the screed, and because the size of the reserved thermal deformation is small, its Very difficult to process and install

At present, most asphalt paver screeds have not adopted effective thermal deformation suppression methods, and the deformation of the screed during construction has seriously affected the quality of paving operations.

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