Pumping system and distributing valve thereof, and concrete transporting machinery

Abstract

The invention discloses a pumping system and a distributing valve thereof, and concrete transporting machinery. The distributing valve of the pumping system comprises a first valve body plate, a second valve body and a rotatable valve plate, wherein the first valve body plate and the second valve body are respectively in sliding matching with two surfaces of the valve plate; the distributing valve has two states, in the first state, a first sucking hole is communicated with a material container through a first passing communicating hole, and a second discharging hole is communicated with a second pumping hole through a second passing communicating hole; and in the second state, a second sucking hole is communicated with the material container through a passing communicating hole, and a first discharging hole is communicated with a first pumping hole through the other passing communicating hole or the first passing communicating hole. The valve plate of the distributing valve does not need to rotate in a hopper, and the distributing valve does not need to be matched with an opening hopper for use; meanwhile, the state conversion of the distributing valve is realized through the rotary valve plate, a driving force required by the distributing valve during state conversion is greatly reduced, and the energy consumption of the distributing valve can be reduced.

Description

technical field [0001] The invention relates to a pumping technology for viscous materials such as concrete, in particular to a distribution valve of a pumping system, and also to a pumping system including the distribution valve and a concrete conveying machine including the pumping system , the concrete conveying machinery particularly refers to a concrete mixing pump truck. Background technique [0002] Concrete mixer truck is the most widely used concrete conveying machinery and equipment. Concrete mixing pump trucks generally include a chassis, a mixing mechanism, a pumping system and a distribution mechanism. The mixing mechanism generally includes a mixing drum; the pumping system includes a hopper, a distribution valve and a delivery cylinder; the distribution mechanism usually includes an arm frame formed by at least two arms, and a delivery pipe is arranged along the arm frame. The basic working principle of the concrete mixer pump truck is: the mixing drum rotat...

AI Technical Summary

Problems solved by technology

[0006] The prior art also discloses a distributing valve that does not need to be used in conjunction with an open hopper, such as a multi-position and multi-way "S" pipe valve disclosed in Chinese patent document CN1336487A. High, it is very difficult to apply in concrete mixing pump trucks; German patent document DE4204330B4 discloses a distribution valve that realizes material distribution through a rotor hose pump, but the working performance of this distribution valve is highly dependent on the hose, so that Its adaptability and service life are difficult to meet actual needs

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