Concrete sand washing experiment apparatus for off-center shaft type irrigation work

Abstract

The invention provides a concrete sand washing experiment apparatus for off-center shaft type irrigation work. The apparatus includes a first frequency adjustable motor, a stirring shaft, a stirring blade, a stirring pot, a stirring pot bottom seat, a rotating shaft, a second frequency adjustable motor, a fixed bottom seat, a connecting rod and a test component fixation clamp, the stirring shaft is installed in the stirring pot, the first frequency adjustable motor is fixed on the upper end of the stirring shaft, the stirring blade is fixed on the lower end of the stirring shaft; the second frequency adjustable motor is installed in the fixed bottom seat, the bottom part of the rotating shaft is fixed on top of the second frequency adjustable motor, the upper end of the rotating shaft connects with the bottom of the stirring pot through the stirring pot bottom seat; one end of the connecting rod is fixed on the side surface of the fixed bottom seat, the other end of the connecting rod connects with the test component fixation clamp, the test component fixation clamp is used to clamp concrete test component, the concrete test component is fixed in the stirring pot; the center line of the stirring shaft is different from that of the rotating shaft. The apparatus reality simulates high-speed sand washing, the process is simple, and the apparatus is convenient to operate.

Description

technical field [0001] The invention relates to an eccentric shaft type water-sand grinding tester for hydraulic concrete, which belongs to building material testing instruments. Background technique [0002] my country is a country with many sandy rivers. The scour and abrasion of hydraulic structures by sandy high-speed water flow has always been a long-term concern in hydraulic construction and operation, and has yet to be properly resolved. At home and abroad, the research and application of improving the anti-scouring ability of hydraulic structures have been very extensive. Since the mid-1980s, various types of anti-scour concrete have been gradually applied in my country. Although the anti-scour test research has been carried out For many years, but the test methods and evaluation standards have not yet been unified. Although the current industry standard "Hydraulic Concrete Test Regulations" DL / T 5150 stipulates "ring method concrete anti-sand flow erosion test", "un...

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Problems solved by technology

Although the current industry standard "Hydraulic Concrete Test Regulations" DL / T 5150 stipulates "ring method concrete anti-sand flow erosion test", "underwater steel ball method concrete anti-scour test", "wind-sand gun method concrete anti-scour test" However, the "underwater steel ball method concrete scour test" and "wind-sand gun method concrete scour test" are both indirect through steel ball grinding or dry sand spraying. Testing the anti-abrasion performance of concrete cannot visually display the anti-abrasion performance of concrete. However, the performance of the instrument used in the "Ring Method Concrete Anti-Sand Water Erosion Test" is not good. It is easy to concentrate and settle at the bottom of the central shaft, which cannot drive most abrasives to grind the test piece. At the same time, the impeller speed of the instrument is fixed, which cannot simulate the real water flow velocity

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