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First, use
  Steel heat pump asphalt
Insulation asphalt pump for conveying medium temperature 350 ℃, made of steel, viscosity of less than 40mm2 / s, without solid particles bitumen , paraffin and other types of coagulation at room temperature and cold areas have outdoor installation and process of insulation requirements of the occasion . Can pass into the thermal oil, hot water, steam and other transport medium for heating and insulation.
Second, the principle
Asphalt pump heat pump is installed in a pair of rotary gear , an active , passive , relying on two gears meshing with each other the entire work within the pump chamber is divided into two separate parts ( Figure I ), A is the suction chamber , B is ranked oil chamber . When the pump is running , the driven gear drive pinion rotates when the gear is disengaged from the engagement , the suction side (A) partial direct air , liquid under the atmospheric pressure is sucked into the pump , the liquid is sucked into the pump are filled with the gear each tooth valley and the drain side is brought (B), when the liquid is extruded into engagement gear , a high-pressure fluid is discharged through the discharge outlet of the pump the pump. When the gear constantly rotating , A, B sides have continued to suction and discharge of oil .
Structure III insulation asphalt pump
1 ) heat pumps are the main components of asphalt pump , insulation sandwich , gears, front cover and the shaft seals and other components. Heat pump and the contact portion of mezzanine and other high-temperature dielectric materials are used parts Ⅱ categories, namely : cast carbon structural fabrication . Gear , bearing sleeve , main shaft , are using passive quality carbon structural steel and heat treated with high strength and wear resistance. 2 ) insulation asphalt pump shaft seal using multi -stage reflux temperature packing , reliable sealing performance.
3 ) insulation asphalt pump heat out of the oil port and oil inlet pipe , using standard flange connection (GB/T9116-2000).
4 ) insulation asphalt pump and motor with flexible coupling connection , mounted on cast iron chassis.
Fourth, the insulation characteristics of asphalt pump
1 ) heat pump asphalt simple and compact structure , easy to install.
2 ) has a good self-priming performance , before each pump is not necessary to add liquid , particularly convenient to use .
3 ) heating pipe flange connection using a standard , easy sealing surface connection , reliable sealing.
4 ) high-temperature dielectric insulation asphalt pump overcurrent parts are made of carbon steel Q235 casting manufacture, and the pressure test , so the pump has good thermal adaptation , safe and reliable .
Fifth, the heat pump asphalt Precautions
1 ) The following items should be checked first boot after installation of insulation asphalt pump :
① valve out of the pipeline is turned on ;
② steering pump is correct ( see the pump from the motor aspects clockwise ) (80,100 RCB counterclockwise rotation ) ;
③ attention to the pump outlet pressure gauge value is within the required technical specifications ;
④ attention to the movement of the pump there is no unusual noise or overheating.
2 ) heat pump asphalt seal if there leaks, trace evenly compress the seal gland bolts or nuts , but be sure to be careful not to overtighten to avoid intense heat transfer and reduce the use of the pump shaft and seal ordered .
3 ) heat transport medium viscosity asphalt pump production line will be high when the vibration , noise and intermittent sound , it is timely to reduce the viscosity of the medium is heated , otherwise cause damage to the pump bearings.
4 ) After the insulation asphalt pump shut down, turn the power off , and then close the discharge valve on the pipeline to avoid pump reverse . The series cast asphalt pump , LQB asphalt pump , CLB asphalt pump factory configuration : Standard: Pump , coupling
Optional : steel asphalt pump , LQB asphalt pump , CLB asphalt pump , pump base , motors , filters