Sliding water sample collector and collection method

Abstract

The invention discloses a sliding water sample collector and relates to the field of water sample collection equipment. The sliding water sample collector comprises a lifting rope, a pressure sensor, a shell, an upper cover, a supporting rod, a pull rope and a base plug, wherein the upper cover is rotationally connected onto an upper end face of the shell; the base plug is connected to a lower end face of the shell in a sealed manner; a groove I is formed in the upper cover; an O-shaped ring I is arranged on the upper end face of the shell; the supporting rod penetrates through the shell; the upper end of the supporting rod is fixedly connected with the lifting rope, and the lower end of the supporting rod is fixedly connected to the base plug; the pressure sensor is arranged at a fixed joint of the supporting rod and the lifting rope; a lug I is arranged on the lower end face of the upper cover; a lug II is arranged on the inner wall of the shell; a lug III is arranged at a part, which is positioned in a cavity of the shell, of the supporting rod; and one end of the pull rope is fixedly connected to the lug I, and the other end of the pull rope penetrates through the lug II and is fixedly connected to the supporting rod through the lug III. According to the sliding water sample collector disclosed by the invention, the water sample collection depth is accurately positioned, and smooth water flow exchange in the lowering process is ensured, so that the water sample collection accuracy is ensured. Meanwhile, the air-tightness of the collector in the lifting process can be ensured.

Description

technical field [0001] The invention relates to a water sample collection instrument, in particular to a sliding water sample collector and a collection method. Background technique [0002] The construction of nuclear power and wind farms is usually near the lake and the sea. In the environmental investigation in the early stage of construction, it is very important to detect the hydrological phenomena around the site, especially the concentration and particle size of suspended sediment in the water. The detection method is to use The water sample collector acquires a layered water sample. Existing collectors are generally divided into the following two types: [0003] One is to open the upper and lower covers of the collector, and then directly lower the collector to a predetermined depth according to the scale on the sampling rope, and then directly lift the collector. During the lifting process, the upper and lower flip covers of the collector are naturally sealed; The...

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Problems solved by technology

[0003] One is to open the upper and lower covers of the collector, and then directly lower the collector to a predetermined depth according to the scale on the sampling rope, and then directly lift the collector. During the lifting process, the upper and lower flip covers of the collector are naturally sealed; The depth is determined according to the scale on the sampling rope. Therefore, when the detected water flow is large, the sampling rope is easy to tilt with the water flow, and it is difficult to determine whether it is lowered to the correct position, resulting in poor stratification accuracy of water sample collection and inaccurate water sample collection; The upper and lower flaps are movable parts, so the design is usually small. During the process of lowering the collector, the water flow exchange is often poor due to the small water inlet, resulting in the inability to obtain high-precision water samples. The resistance causes the flip cover to not be tightly sealed, or even unable to close or fall off, which affects the smooth progress of water sample collection;

[0004] The other is a collector that uses a special gravity hammer trigger mechanism to collect water samples at a predetermined depth. This kind of collector has a relatively complicated structure and requires a special trigger mechanism for triggering. When the water depth is deep, the trigger is prone to failure, resulting in Water collection failed; and its trigger mechanism is also easily damaged by touching the bottom of the water during shallow water operation. This damage cannot be repaired on-site on the sampling vessel, which leads to sampling failure and wastes a lot of manpower and material resources

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