I. Introduction: 
 YP series marine, pipeline cleaning, pumping stations, Langfang City Section crown filter research the domestic shipbuilding industry, and problems that exist in the string of oil process, the new string of oil equipment to conduct a comprehensive analysis of the design of the Institute. 
 Design Concept: 1, a traditional string oil pumping stations placed on the deck of the ship, the temporary pipeline is too long, metal impurities than the major, not oil back to the pumping station oil filter to solve this problem, according to the tube Road, require design and production of small pumping stations (type 40-125), into the cabin ministries, according to unit requirements prior to design. Thus a large proportion of impurities in the pumping station to filter out. 
 2, the traditional way of heating oil is the thermal conductivity of electric heating oil, resulting in the electric heating tube around the knot carbon, and carbon at the end off to the oil, causing the secondary pollution of the oil to make the oil physical and chemical work nature of both changes. To solve this problem, I conducted a lot of tests, invented the the knotless carbon heating plate, compared with the other similar heater, carbonized under the same heating rate. 
 3, the traditional string of oil, the working oil in the completion of the cleaning of a ship, due to the oil heated to high temperatures, oil changes, less than the initial oil quality, and can not continue to use. YP series pump station with no knot carbon heating film without any impact on the oil, the oil can be used multiple times to achieve energy saving requirements. 
 Second, the principle 
 Polymer filter plate paper, select the appropriate aperture based on filtering accuracy standards. Cleaning oil in the tank using the company's own knot-free carbon heater, heating temperature of 40-80 degrees Celsius (self-set temperature), high pressure pump chamber through the pump inlet filter inhalation, by the gear pump oil into the hull tube Road to its cleaning strings oil. Back to the oil through the oil return filter (two can be used interchangeably) filter impurities flowing into the fuel tank heating to heat up, the next work cycle.