Tow-position six-way reversing valve for pressure-adjusting type suspended load sampler

Abstract

The invention provides a reversing valve for a pressure-adjusting type suspended load sampler. The reversing valve is provided with two working positions and six through ways. The reversing valve comprises a valve body, a ceramic valve core, a stopping block, an end cover and an electromagnet, wherein the ceramic valve core comprises two fixed pieces and a movable piece each of which is provided with a water-passing hole, an air inlet hole, a blind groove, convex shoulders and a groove; the two convex shoulders on the movable piece are respectively matched with the grooves on the two fixed pieces; the valve core is arranged in seat grooves of a valve body and a valve cover; and after the valve cover is connected with the valve body by bolts and presses the valve core, hard sealing is formed between the contact surfaces of the movable piece and the fixed pieces. The electromagnet is driven to push the movable piece of the valve core to move left and right by a pushing rod, and the water-passing hole and the air inlet hole on the movable piece of the valve core are respectively aligned to the water-passing hole and the air inlet hole on the fixed pieces and are respectively communicated with the water-passing holes and the air inlet holes on the valve body and the valve cover, so that two independent through ways are formed, i.e., a water way and an air way, and further the function of switching the paths is realized. The reversing valve provided by the invention has the advantages that the working reliability and the service life of a switch valve can be greatly improved and the sampling is more accurate.

Description

technical field [0001] The patent of the present invention relates to a two-position six-way reversing valve, which is used for switching the working state of a pressure-regulating suspended mass sampler. Background technique [0002] With the continuous development of the national economy, soil erosion and ecological environment construction have been put on the important agenda. Accurate collection of hydrological and sediment data can provide accurate sediment transport data for the decision-making of water and soil erosion, environmental governance and flood control departments. great practical significance. [0003] The key to collecting hydrological and sediment data is to accurately and timely collect sediment-containing river water samples, which has long been a major problem for hydrological departments. In order to meet the needs of river sediment water sample collection, relevant domestic departments have continuously developed and improved sediment sampling inst...

AI Technical Summary

Problems solved by technology

The two-way sampler has the problem of too long pressure regulation time and nozzle sand accumulation, the three-way sampler solves the problem of too long pressure regulation time, and the four-way sampler basically solves the problem of long pressure regulation time and nozzle sand accumulation

There are major defects in this rotary valve structure: first, the structure is complex, the failure rate is high, and maintenance is difficult; The volume of the valve is limited, the teeth of the driving gear are easily broken, the transmission chain is damaged, and the switch valve is invalid; the fourth is that the seal is not reliable, the motor is prone to water ingress and malfunction, and the reliability is low

From the perspective of usage, many problems of the above on-off valves lead to the inability of the sampler to sample accurately, which has brought troubles to the hydrological department

Images