Multifunctional depth-setting water level water quality sampling device

Abstract

The invention discloses a multifunctional depth-setting water level water quality sampling device. The sampling device comprises a horizontal telescopic pole, wherein the horizontal telescopic pole is fixed to a tripod on the shore; a sampling disc including a cover is hung on the front end of the horizontal telescopic pole through connecting lines; the sampling disc with the cover comprises a top cover and a disc body; connecting line through holes and liquid feeding needle through holes are formed in the top cover; a liquid feeding needle passes through the liquid feeding needle through holes so that sampling and liquid feeding are controlled under the driving of a liquid feeding needle motor; a water quality parameter measuring device is arranged outside the top cover; the disc body comprises a chamber which can accommodate a plurality of sampling bottles; the sampling bottles are respectively arranged on a rotating platform with multiple grooves; the rotating platform is driven by a bottom rotating motor so that the sampling bottles respectively rotate below the liquid feeding needle for sampling; the liquid feeding needle motor, the water quality parameter measuring device and the rotating motor are respectively connected with a controller. The sampling device is characterized in that the water quality parameter under the depth is measured by the water quality parameter measuring device after the sampling disc reaches a preset sampling depth, and the sampling bottles respectively execute continuous sampling, and thus the sampling device is simple to operate and convenient to use.

Description

technical field [0001] The invention belongs to the field of hydrology and environmental monitoring, and in particular relates to a multifunctional water quality sampling device for fixed depth water level. Background technique [0002] In recent years, with the rapid development of the economy, domestic surface water has been polluted to varying degrees. These pollutions threaten the development and utilization of surface water and affect the development of cities and people's health. Therefore, the monitoring of surface water has been widely used. s concern. [0003] In the current hydrological and environmental monitoring, national standard sampling methods are required. For example, it is clearly stipulated in the "Technical Specifications for Surface Water and Sewage Monitoring" (HJ / T91-2002) that when sampling water quality, the depth of the water quality sampling point must be determined according to the depth of the surface water body. . The water samples collected...

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Problems solved by technology

[0005] (1) The depth is determined by the length of the rope, and in the river with a fast flow rate, the sampling container will have a certain offset along the flow direction of the water, which will affect the accuracy of the depth value

[0006] (2) After collecting a water sample, the sampling container must be recycled and cleaned to avoid interference, and then repeated sampling, the continuity of sampling is very poor, which cannot meet some sampling monitoring that needs to ensure continuity

[0007] (3) For large rivers or reservoirs, the water depth is relatively deep, and the temperature, dissolved oxygen, and pH of the water body change significantly with the depth. The existing sampling devices cannot meet the real-time measurement of temperature, dissolved oxygen, and pH, and the measurement is still carried out by collecting samples after landing , the environmental parameters on the shore will have a great impact on the temperature, dissolved oxygen and pH parameters

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