Boom system and pumping machinery

Abstract

The invention discloses a boom system and pumping machinery provided with the boom system. The boom system comprises a delivery pipe and a vibration damper connected with the delivery pipe; the vibration damper forms a pressure reduction segment and an inlet and an outlet communicated with the pressure reduction segment; and the through-flow section of the pressure reduction segment is larger than that of the inlet and that of the outlet. In the preferential technical scheme, the vibration damper also comprises an expansion segment positioned between the inlet and the pressure reduction segment, and a contracted segment positioned between the pressure reduction segment and the outlet, wherein, the through-flow section of the front end of the expansion segment is smaller than that of the back end thereof; the through-flow section of the front end of the pressure reduction segment is not smaller than that of the back end of the expansion segment; the through-flow section of the front end of the contracted segment is larger than that of the back end thereof; and the through-flow section of the back end of the pressure reduction segment is not smaller than that of the front end of the contracted segment. In the boom system, the pressure reduction segment of the vibration damper can reduce the pulsation amplitude of fluid, thus further reducing vibration of the boom system caused by fluid pulsation.

Description

technical field [0001] The invention relates to a technique for pumping viscous fluids such as concrete, in particular to an arm support system and a pumping machine with the arm support system. Background technique [0002] Concrete pump truck is one of the most widely used concrete machinery. Concrete pump trucks generally include pumping devices and boom systems. The pumping device generally includes a hopper, a delivery cylinder and a distribution valve. The hopper is used to store concrete. The distribution valve can be driven by the swing cylinder to perform state conversion and form the output port of the pumping device. The boom system includes a boom and a conveying pipe. The boom includes a section arm formed by sequentially hinged and connected through a transverse hinge shaft. It has an input port and an output port, the input port communicates with the output port of the distribution valve, and the output port is provided with a corresponding hose, so as to ac...

AI Technical Summary

Problems solved by technology

The technical solutions disclosed in these patent documents are only from the perspective of controlling the attitude of the boom to contain the amplitude of the vibration at the end of the boom, and cannot reduce the pulse of concrete flow. Therefore, the vibration reduction technical solutions disclosed in the above patent documents have very limited effects

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