Pumping machinery, pumping system, distribution valve for pumping system, and method for operating pumping system

Abstract

The invention discloses pumping machinery, a pumping system, a distribution valve for the pumping system, and a method for operating the pumping system. The distribution valve for the pumping system comprises a valve body and a valve core which are in sliding fit with each other; a material charging opening, two material charging and discharging openings and two material pumping holes are formed on the valve body; two material absorption channels and a material pumping channel are formed on the valve core; in an extending direction of an inner slideway, the material pumping channel is provided with a preset size; when one material absorption channel is communicated with the material charging opening and one material charging and discharging opening, the other material charging and discharging opening is communicated with a corresponding material pumping hole through the material pumping channel. When the distribution valve is utilized, at least one conveying cylinder is communicated with a conveying pipe through the material pumping channel in any one state of the distribution valve; and in the state switching process, at least one conveying cylinder is communicated with the conveying pipe. By the distribution valve, the at least one conveying cylinder is communicated with the conveying pipe at any moment, and a precondition is provided for continuous and uninterrupted pumping of the pumping system.

Description

technical field [0001] The invention relates to a pumping technology, in particular to a distribution valve of a pumping system, a pumping system including the distribution valve, and a pumping machine including the pumping system. It also relates to a method of operating a pumping system. Background technique [0002] A commonly used pumping system usually includes a pumping power part, a material container, a distribution valve and a delivery pipe. The pumping power part includes a first delivery cylinder and a second delivery cylinder. The first delivery cylinder and the second delivery cylinder are arranged side by side at the front of the material container, and the pistons inside are respectively driven by a hydraulic cylinder for telescopic movement. There are many structures of distributing valves, commonly used ones are S-type valves, gate valves, C-shaped valves, skirt valves and so on. [0003] The working principle of the pumping system is: at the predetermined...

AI Technical Summary

Problems solved by technology

[0005] Although the technical solution disclosed in the Chinese patent document CN1946937B can realize continuous pumping of materials, the technical solution requires two control slides and a corresponding operation method to realize connected pumping, which not only leads to a complicated structure of the distribution valve, Its disclosed operation method for realizing continuous pumping is also very complicated

[0006] In addition, in the technical solution disclosed in the Chinese patent document CN1946937B, in order to realize the state transition of the distribution valve, the control slides need to be arranged vertically; in this way, when the distribution valve performs state transitions, it is not only necessary to overcome the gravity and inertia of the control slides themselves, It is also necessary to overcome the pressure effect of the material in the material container on the control slide, resulting in a large switching resistance of the distribution valve

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