Effluent collecting device capable of applying back pressure

Abstract

The invention relates to an effluent collecting device capable of applying back pressure. The device comprises a cavity, a sensor, a reference tube, a differential pressure sensor and an air pressuresupply device. The cavity comprises an outer cylinder, an inner cylinder, a tray and a funnel; a top plate for covering the outer cylinder is arranged at a top end of the outer cylinder; the top plateis provided with an outflow liquid infiltration port and a cavity vent hole; the inner cylinder, the tray and the funnel are arranged in the outer cylinder; and the tray is arranged on the sensor, the tray is located in the inner cylinder, the funnel is arranged in the outer cylinder through a support, the funnel is connected with and passes through the outflow liquid infiltration port in the topplate through a guide pipe, a water inlet of a cavity bottom plate is connected with the inner cylinder, the upper end of a reference pipe is connected with the cavity vent hole and the air pressuresupply device, and the lower end of the reference pipe is connected with a cavity bottom plate connection hole through the differential pressure sensor. During usage, the outflow liquid infiltration port on the top plate is connected with an infiltration device. In the invention, loading of the back pressure, measurement of mass of outflow fine particles and the measurement of a volume of outflowliquid can be realized.

Description

technical field [0001] The invention relates to an experimental device, in particular to an outflow collection device connected with a permeation device and capable of applying back pressure. Background technique [0002] Under the action of seepage, the fine particles in the soil are lost in the pores formed between the coarse particles, which is called the seepage phenomenon of the soil. Similar to the general soil permeability coefficient measurement test, the instruments currently used to obtain soil erosion development information mainly include rigid wall penetration instruments and flexible wall instruments, of which the flexible wall instrument is a triaxial The seepage device is the main one. Due to the need to realize the seepage of the soil, the bottom plate of the triaxial instrument cavity usually needs to open holes, so the method of passing carbon dioxide first and then injecting anaerobic water is usually used to saturate the sample. However, the saturation...

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Problems solved by technology

[0004] Chinese invention patent CN201110133687.2 uses the water head saturation method to saturate the sample, but it takes a long time to saturate a larger sample, and the saturation effect is difficult to guarantee

Chinese invention patents CN201710317454.5 and CN201320645550.X both propose an outflow collection device, but the device is not a closed structure and cannot realize the application of back pressure

[0005] To sum up, since the current device cannot realize the loading of back pressure, it is difficult to guarantee the saturation effect of the soil, and the saturation time required for the soil is relatively long

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