Heat energy that utilizes automobile engine tail gas preheats preheating device on road surface

The utility model discloses a heat energy that utilizes automobile engine tail gas preheats preheating device on road surface, include and set up the fixed spray tube below vehicle chassis and install the switching valve on the automobile engine gas vent along the automobile is horizontal, a gas outlet of switching over the valve is linked together with the automobile exhaust delivery pipe, another gas outlet of switching over the valve is linked together through gas -supply pipe and fixed spray tube, fixed spray tube is connected with vehicle chassis, it spouts the fumarole to the road surface with tail gas to set up a plurality of being used for on the fixed spray tube. Adopt this preheating device to heat on effectual road surface to before the operation, its effect is the difference in temperature that reduces the hot pitch that sprays and road surface, can make hot pitch and road surface combine together better, improves the bond property of hot pitch, and then improves the thermal utilization ratio of a