Pipeline cleaning is very important to ensure pipeline transportation and process production. High pressure cleaning machine has become the preferred equipment for pipeline cleaning operations of enterprises, which can save a lot of resources and financial resources for enterprises. However, in order to achieve a good cleaning effect, the selection and matching of the nozzle is very critical.


 
High pressure cleaning machine is the use of high density high pressure water jet beam direct injection generated by the huge impact of cleaning objects, so as to achieve the purpose of cleaning. Therefore, in order to achieve a good cleaning effect, high density and high cohesion of high pressure water jet is absolute.
 
 
The size of the pump pressure determines the damage degree of the adhesion layer, too much pressure is easy to destroy the cleaning matrix and produce unnecessary energy waste, and too little pressure can not achieve the cleaning effect. The proper flow rate is also related to the cleaning efficiency and effect, so the choice of nozzle aperture size is crucial.
 
Generally, large sewage pipes need 30 ~ 50 MPa pressure, and the flow rate requires a large flow rate of 150 ~ 200 L/min; Sugar equipment, pipelines, chemical fertilizer plant pipelines need 50 ~ 80MPa pressure, flow 50 ~ 80 L/min; Gas flue and oil pipeline pressure 50 ~ 70MPa, flow 70 ~ 110L /min; The extremely hard silicate adhesion layer requires relatively high pressure and flow rate of 100 ~ 140 MPa pressure, flow rate of 80 ~ 100 L/min.
 
In addition, affected by the difference in nozzle structure performance, even under the same outlet pressure and flow conditions, the dynamic pressure will have a relatively large difference in the distribution of volume. It can be seen that the hole shape selection of the nozzle is also a very important key link.
 
 
 
In the field of pipeline and industrial cleaning, most of the high pressure nozzles in the shape of cones and columns are used, and the inner holes are transformed from conical to cylindrical. The transition line of the conical column and the end edge of the column must not be chamfered. The best taper of the conical surface is 12~14°, the best ratio of the length of the cylindrical hole to the diameter is 2.5~3.0, and the inner surface of the hole is required to be polished and its roughness is limited to 0.8-0.4. Meeting the above parameter requirements, the high pressure water jet issued from the nozzle can ensure high density and high cohesion, so as to obtain a longer effective target distance and a wider jet area, so that the efficiency of the high pressure washer to clean the industrial pipeline can be improved.