Rainwater runoff automatic staged sampler

Abstract

A rainwater runoff automatic staged sampler comprises a box body with an open upper end, a water collecting tank and a flow guide tank are suspended in the box body through a supporting plate, and a water collecting inclined plate is arranged between the water collecting tank and the inner wall of the upper portion of the right side of the box body; a plurality of round holes used for placing water collecting bottles are formed in the bottom of the flow guide tank at intervals, a first overflow plate is arranged on the left side of the round hole in the first position, a second overflow plate is arranged between every two adjacent round holes, and a third overflow plate is arranged on the right side of the round hole in the last position; the interior of the flow guide tank is divided into a plurality of sampling chambers by the first overflow plate, the second overflow plates and the third overflow plate; according to the sequence from left to right, the front side wall and the rear side wall of the front three sampling chambers in the width direction of the box body are each provided with an overflow hole, a baffle is hinged to the upper portion of each overflow hole and opens or closes the corresponding overflow hole through an electric telescopic rod, and the electric telescopic rods are controlled through an energization delay time relay. Automatic staged continuous sampling is achieved, and it is effectively guaranteed that the water collecting bottle takes water at the set time interval.

Description

technical field [0001] The invention relates to the technical fields of rainwater runoff pollution monitoring and water environment protection, in particular to an automatic rainwater runoff sampler in stages. Background technique [0002] With the rapid development of urban construction, the area of ​​hard pavement and the density of buildings in the city continue to increase, which leads to an increase in surface rainwater runoff and flood disasters; due to the dissolution of pollutants in the air and the erosion of rainwater on roofs and ground, rainwater Runoff contains a lot of pollutants. In order to study the various pollutant indicators of rainwater runoff in a certain area and its variation with rainfall time, it is necessary to collect rainwater runoff at different sampling points during different periods of rainfall. There are two main ways of collecting rainwater runoff at present. One is manual collection, that is, during the rainfall process, the sampling pers...

AI Technical Summary

Problems solved by technology

There are two main ways of collecting rainwater runoff at present. One is manual collection, that is, during the rainfall process, the sampling personnel take samples through the sampling bottles at the specified sampling locations. Due to the uncertainty of the rainfall time and the non-uniformity of the sampling locations, Manual sampling is often difficult to collect initial rainwater runoff in time, which consumes a lot of manpower and time. Sampling in bad weather such as heavy rain is likely to pose a safety threat to sampling personnel

The other is sampling device sampling, such as the application number 201510502913.8, the name is an automatic rainwater runoff collector, the patent publication number is 105136519A, when the rain is sensed by the rain sensor, the single chip microcomputer of the circuit control module judges that there is enough strength Rainwater dripping, so as to control the sampling of subsequent rainwater runoff, can achieve multi-point simultaneous sampling, but because the outdoor sampling bottle is connected to the indoor sampling device through pipes, the sampling distance is limited, and continuous sampling in stages cannot be achieved; application number It is 201620903276.5, and the name is an automatic stage-by-stage continuous timing sampler for rainwater runoff in vegetable fields. The patent publication number is 205941068U. The rainwater runoff sampling is started when two rainwater sensors are used to determine the amount of rainfall that forms runoff. In the core control circuit unit The advanced PLC controls the peristaltic pump, liquid level sensor and stepping motor. Through the rotation of the turntable with the sampling tank according to the set interval time, the automatic staged continuous timing sampling of the rainwater runoff is realized. At the same time, by setting the sampling interval time and automatic The start-up and shutdown time, combined with the liquid level sensor control, realizes the sampling of multiple rainfalls in a short period of time during the rainstorm. , the sampling point is suitable to be selected at the low-lying water storage place where the runoff passes. Therefore, it is difficult to collect rainwater runoff when the runoff is small in flat places such as roads.

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