The early purchase of our company HBT60 gate valve concrete pump power is low, the outlet pressure is low, the structural design is backward, coupled with the long service life, serious wear and tear of the transmission cylinder, hydraulic system leakage and other issues, the efficiency is very low, even replace the worn Components, because of its low technical performance parameters, can not meet the current construction requirements. Therefore, it is necessary to improve the pump performance parameters on the basis of the original, to improve its unreasonable structure, so that it is upgraded to HBT60G. 1 to improve pumping performance, in the design parameters to reach the level of similar domestic models HBT60 basic configuration for the main pump A7VO160, constant power control, system pressure 28MPa, the main cylinder bore φ80mm, concrete delivery cylinder φ195mm, travel 1400mm, motor Y250M -4, power of 55kW, speed of 1480r / min, concrete outlet pressure of 4.7MPa, concrete delivery capacity of 50m3 / h, can be seen from the pump performance curve of its technical performance parameters are low, the configuration for proper improvement , Its technical performance parameters improved significantly, that is the main oil pump A8VO107 double pump, constant power control, system pressure 28MPa, the main cylinder bore φ100mm, concrete delivery cylinder φ195mm, travel 1400mm, the motor Y280S-4, the power speed of 1480r / min, 75kW, concrete outlet pressure of 7.36MPa, concrete delivery volume of 65m3 / h, model change to HBT60G. HBT60 and HBT60G pumping performance curve is as follows: Performance analysis is as follows: (1) In theory HBT60 concrete pump at exit pressure 1.5MPa or so into the constant power, but the actual system itself has pressure loss, the boot will enter constant power, with the transmission distance and Due to the increase of power, HBT60G concrete pump enters constant power at outlet pressure of 2.5MPa, the theoretical delivery of concrete reaches 62m3 / h, 45m3 / h compared with that of HBT60 concrete pump at 2.5MPa, Increase 17m3 / h. (2) The maximum outlet pressure of HBT60 concrete pump is 4.7MPa, the concrete theoretical delivery volume is 25m3 / h, the maximum outlet pressure of HBT60G is 7.36MPa and the theoretical delivery volume of concrete reaches 25m3 / h. The delivery volume of 37m3 / h, indicating that the pumping distance or height of HBT60G concrete pump is nearly twice that of HBT60 concrete pump. (3) When pumping the same distance or height, the hydraulic system pressure HBT60G concrete pump is smaller than the HBT60 concrete pump, the system reliability is high. For example, when the outlet pressure is 3MPa, the pressure of the HBT60G concrete pump system is 11.5MPa, and the HBT60 concrete pump The system pressure is 18MPa. 2 Configuration and structural changes, improve the reliability of the machine To improve the reliability of the machine, hydraulic system and other structural aspects made a significant improvement (1) to improve the hydraulic system, the mixing and cleaning system The gear pump for oil supply is replaced by double gear pump to make mixing and cleaning into independent circuit and increase the pressure of mixing system and washing pressure to reduce the pressure of the main system and improve the service life of hydraulic components and improve the cleaning ability of concrete pump . (2) to improve the mixing drive system, the chain of transmission to the motor and drive shaft directly connected to the form, to simplify the structure and reduce the point of failure. (3) Improve the slide valve cylinder assembly, additional buffer system and piston guide sleeve in the cylinder to improve the service life of the spool valve cylinder. (4) Increase the protection system on the electrical system, make the electrical control more reasonable, and ensure the stability of the operation. The safety has also been greatly improved. In short, after the improvement of the concrete pump, its comprehensive performance has been greatly improved and achieved the expected purpose. It reflects well in actual use and has obvious effect. It has a qualitative improvement compared with the previous ones and meets the needs of construction and production.
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