A sampling device for collecting hydrological information

Abstract

The invention discloses a sampling device for hydrological information acquisition, and relates to the technical field of water sampling devices. The sampling device comprises a base frame, a mountingframe, a sampling tank and a rotating assembly. The base frame is connected with a winch through a steel cable, the mounting frame is fixed on the side end of the base frame, a plumb bob is rotatablyarranged on the mounting frame, and a getter pump is mounted on the rotating assembly. The plumb bob is arranged on the mounting frame, the sampling tank can be pulled to be in a vertical state underthe action of the gravity of the plumb bob, the actual sampling water layer is kept consistent with the water depth measured by the liquid level meter, and the purpose of accurate sampling is achieved. The heat preservation box is arranged in the sampling assembly, so that a water sample is not assimilated by the external temperature of the device between different water layers, and the guaranteedegree of the water sample is improved. The rotating assembly is arranged on the base frame, so that the cover body is automatically opened during material taking, an operator can directly take downthe heat preservation box from the sampling assembly in an opened state, and the mounting and dismounting efficiency of the device is rapidly improved.

Description

technical field [0001] The invention relates to the technical field of water sample sampling devices, in particular to a sampling device for collecting hydrological information. Background technique [0002] In order to carry out real-time monitoring of hydrological information to grasp important information such as sediment content, oxygen content, and microbial species or distribution in the water area, it is necessary to collect water samples for analysis. Most of the existing sampling procedures are to drive the winch to In the water area to be sampled, the sampling device is pulled by the cable to sink, and the water depth is dynamically measured by a pressure sensor or a liquid level gauge, and then the water layer to be measured at the depth is sampled. [0003] However, the sampling device used in this process still has certain disadvantages: 1. Since the winch inevitably swings with the waves on the water surface, and there is external torque interference such as tu...

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Problems solved by technology

[0003] However, the sampling device used in this process still has certain disadvantages: 1. Since the winch inevitably swings with the waves on the water surface, and there is external torque interference such as turbulence underwater, the cable or sampling device is extremely It is easy to be deflected underwater, which will cause the collected water samples to not be the vertical water line samples that you want to measure. At the same time, due to the inclination of the device itself, the water depth measured by the liquid level detection instrument and the actual sampling depth will also appear different. 2. The temperature of the water samples collected by the sampling device will be assimilated by the outside world between the water layers of different depths, so it is impossible to measure the true temperature of the hydrology of the sample layer, and the obtained water samples are more sensitive to temperature. The survival state of microorganisms will have a certain impact; 3. The installation and disassembly of the sampling tank needs to be manually twisted, and the inside is filled with sealing liquid during disassembly, which causes the internal pressure of the device to be lower than the external atmospheric pressure during sampling, and the sealing cover is difficult to open under the action of atmospheric pressure , so as to have a certain impact on the test process; 4. During the process of filling the sampling tank with water samples, the buoyancy of the water sample tank will gradually decrease with the discharge of internal air, which will inevitably cause the sampling device in the water to tilt Phenomenon

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