| 摘要 |
<p>The present invention provides a pumping mechanism and a control method therefor. The pumping mechanism comprises a first conveying cylinder, a second conveying cylinder, a distribution valve, and a spool swingably disposed in the distribution valve. The distribution valve is in communication with one end of the first conveying cylinder and one end of the second conveying cylinder. The spool is in communication with a feed inlet of the distribution valve. The spool comprises a first station, a second station, and a third station. In the first station, the first conveying cylinder is in communication with the feed inlet by means of the spool, and the second conveying cylinder is in communication with a discharge outlet of the distribution valve. In the second station, the first conveying cylinder and the second conveying cylinder are both in communication with the discharge outlet. In the third station, the first conveying cylinder is in communication with the discharge outlet of the distribution valve, and the second conveying cylinder is in communication with the feed inlet by means of the spool. By using the pumping mechanism of the structure, the pumping efficiency can be effectively improved, and the pumping continuity can be better. In addition, the present invention also provides a concrete pumping device.</p> |
