Organic pollution water sample pump nozzle sampler

Abstract

The invention relates to an organic pollution water sample sampler at a pump tube opening, which structurally comprises a flow stabilizing buffer tube for taking a pumped polluted water sample and conveying the polluted water sample in a stable flow manner, a pump tube connecting mechanism connected with a polluted water sample output pump tube, a split pressure adjusting valve for adjusting the pressure of flow of the polluted water sample, a pressure gauge for detecting the pressure of the flow, a sampling hose for guiding the polluted water sample in the laminar condition from the flow stabilizing buffer tube through a streamline water outlet to collect the water sample, and a concentric type flow regulator for regulating the flow of the collected water sample. The sampler has the characteristics of small size, light weight, wide application range, convenience for carrying, convenience for mounting operation, simplicity in operation, safety in use, capability of preventing the sample from being contaminated in the collection process, and the like, the fidelity of the collected sample is improved, the collection cost of the sample is lowered, people and equipment security is ensured, and the universality of the sample is improved.

Description

technical field [0001] The invention relates to a collection device for water samples containing volatile and semi-volatile substances, in particular to a sampler for pump nozzles of water samples polluted by organic matter. Background technique [0002] Due to the particularity of volatile and semi-volatile substances contained in water samples polluted by organic matter, the collection of samples is different from other water samples. [0003] At present, the commonly used method of collecting water samples contaminated by organic matter is to fasten the fire hose with a hose clamp at the mouth of the pump pipe where the contaminated water sample is drawn, and then collect the sample through a four-way diversion method. The sampling components used mainly include sample collection four-way, four-way diverter, lined fire hose, hose clamps, large and small pipe joints, straight pipes, quick-connect snap rings, pressure gauges, socket-type connection towers, and pressure regu...

AI Technical Summary

Problems solved by technology

[0007] (1) Fire hoses, transparent pressure-resistant plastic hoses, raw material belts, etc. used in the sample collection device are likely to contaminate the samples and distort the samples; especially during the first few times of use, the harmful components released by the materials used have a negative impact on the samples. The quality of the sample can have a big impact, contaminating the sample

[0008] (2) The sample collection device has many parts and complex structure, with a total weight of more than 80kg, which is bulky and inconvenient to carry

[0009] (3) On-site assembly procedures are complex, cumbersome and time-consuming

Some parts adopt American standard, which is not conducive to the connection between each other, and the operation is inconvenient

[0010] (4) Cavitation is prone to occur at the turning and variable diameter parts of the sample collection four-way and the sample flowing through the pipeline. When the vacuum in the cavitation is greater than the saturated vapor pressure of some volatile substances or semi-volatile substances in water , which will cause the overflow and loss of these volatile or semi-volatile substances, which will distort the sample

[0012] (6) When the head or power of the pump is large, the discharge valve installed on the head of the fire hose will swing left and right due to the reaction force of the water outlet from the nozzle. If the control is not firm, it will pose a threat of impact to the operator and surrounding objects

[0013] (7) The maximum size of the suction pump nozzle that the sample collection device can be connected to is DN100. For pump pipes larger than this size on site, sampling operations cannot be performed because they cannot be connected.

[0016] The sample error is too large, which sometimes leads to conclusions that the evaluation results are diametrically opposed to the actual situation

If the sample collection process causes the pollutants in the sample to overflow and lose more, resulting in a lower indoor detection value than the actual value, it is possible to evaluate the polluted waters as unpolluted or lightly polluted waters, and the pollution is not taken seriously. Continuing to use it in production and life will eventually increase the degree of pollution and directly affect the quality of life of the people. Long-term use in production, living and drinking will cause physical damage to the people and directly affect the healthy development of the national economy.

[0017] In the process of sample collection, if the water sample is improperly used by the material of the sampler, the content of pollutants in the sample increases, making the indoor detection value higher than the actual value, and it is possible to classify the unpolluted or lightly polluted area as Areas that are polluted or heavily polluted, on the one hand, waste the cost of treatment, and on the other hand, affect the mood of the people who do not know the truth, which is not conducive to social stability

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