Salinity meter with suction pump protecting device

Abstract

The invention relates to a salinity meter with a suction pump protecting device, which comprises a salinity meter main body with a suction pump and a sump and is characterized by also comprising the suction pump protecting device, wherein the upper end of the suction pump protecting device is connected with the inlet end of the suction pump, while the lower end is inserted into the sump; a tubular body in the suction pump protecting device is divided into three cavities by a valve seat and a director from the top to bottom, namely the cavity wall side above the valve seat is provided with a safety valve communicated with the external atmosphere by means of an air inlet; the cavity wall side between the valve seat and the director is provided with an air inlet hole; and a floater is arranged in the cavity under the director, a valve rod passing through the director is fixed in the axial direction of the floater, and the top of the valve rod is provided with a valve head. The valve head prevents waste liquor from entering the suction pump along with the rise of the liquor level. The salinity meter has simple process, eliminates corrosion even burning of the suction pump caused by ambient environment and improper human operation, ensures the continuity and stability of field salinity measurement, prolongs the service life and reduces the maintenance charge.

Description

technical field [0001] The invention relates to a salinity meter, in particular to a salinity meter with an air suction pump protection device. Background technique [0002] Salinity is the basic element of all marine survey projects. The existing SYA2-2 laboratory salinity meter is a high-accuracy and intelligent instrument for measuring the salinity of seawater samples. The instrument is novel in design, high in accuracy, simple in operation, strong in intelligence, and expensive in price. The aspirating sampling system adopted therein reduces the consumption of standard substances and samples, reduces the cost of using standard substances, and improves work efficiency. However, due to the closedness of the aspirating sampling system including the aspirating pump, during use, the aspirating pump takes into account the functions of discharging waste liquid and introducing liquid, and is directly connected with the waste liquid pool. If it is too high, when the liquid leve...

AI Technical Summary

Problems solved by technology

However, due to the closedness of the aspirating sampling system including the aspirating pump, during use, the aspirating pump takes into account the functions of discharging waste liquid and introducing liquid, and is directly connected with the waste liquid pool. If it is too high, when the liquid level of the waste liquid reaches a certain height, the waste liquid needs to be discharged manually in time. If the liquid level in the waste liquid pool fluctuates greatly or the operation is improper, the liquid will easily enter the suction pump, causing the suction pump to corrode or even burn , resulting in the instrument not working properly and being damaged

In particular, the instrument has been used on the sea for a long time. Once it is damaged, not only the expensive instrument will be lost, but also the overall work of marine survey and measurement will be affected.

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