Adjustable throttling exhaust head and differential pressure sander with the adjustable throttling exhaust head

The invention belongs to the field of rail transit vehicle apparatuses, and specifically relates to an adjustable throttling exhaust head and a differential pressure sander with the adjustable throttling exhaust head. The adjustable throttling exhaust head comprises an adjusting head and an adjusting seat. A semi-closed vent hole is arranged in the inner ring of the lower end of the adjusting head, and the inner ring of upper end of the adjusting seat is provided with a semi-closed vent hole matched with the vent hole of the adjusting head. The adjusting head and the adjusting seat are movablyconnected. The invention has the advantages that the adjustable throttling exhaust head has a simple and ingenious structure, and the size of the vent hole of the adjustable throttling exhaust head can be changed by adjusting the rotational position of the adjusting head, thereby changing the airflow in the adjustable throttling exhaust head and consequently adjusting the sanding amount of the sander. The operation is si