Multifunctional multi-channel sample loading device for permanganate index analyzer

Abstract

The invention relates to a multifunctional multi-channel sample loading device for a permanganate index analyzer. The multifunctional multi-channel sample loading device for the permanganate index analyzer comprises a shell, four groups of sample loading units, a four-way reversing valve, and a mobile sample loading head, wherein the sample loading units aremounted in the shell and used for independently adding reagents required for a test, and each group of sample loading unitscomprises a syringe pump; a pure water sample injection port, a reagent sample injection port, a sample discharging port, and a syringe pump connection port are formed in the four-way reversing valve correspondingly,and the four-way reversing valve isconnected with the syringe pump through the syringe pump connection port; and the mobile sample loading head is movably arranged in the shell and horizontally moves in the shell, and the mobile sample loading head is connected with the sample discharging port of thefour-way reversing valve. Compared with the prior art, the multifunctional multi-channel sample loading device for the permanganate index analyzer adopts a 4-channel sample injection system design, cross-contamination between different reagents is effectively avoided, and reliability of experimental result data is improved; no pipeline is reused, the cumbersome reused pipeline cleaning and liquidthrowing processesare reduced, liquid addition efficiency is improved, and analysis and measurement time are saved.

Description

technical field [0001] The invention relates to the technical field of permanganate index analyzers, in particular to a multifunctional multi-channel sampling device for permanganate index analyzers. Background technique [0002] In the permanganate index analysis experiment, chemical reagents such as sulfuric acid or sodium hydroxide solution, potassium permanganate solution, and sodium oxalate solution need to be added in different steps. The accuracy and parallelism of the sample amount are poor, and the experiment is a conditional experiment. The amount and speed of the sample amount directly lead to the difference in the measurement results, and there are obvious disadvantages. [0003] Along with the research and development of automation instrument, the device that adopts mechanical pump to replace manual sampling gradually appears on the market, discloses a kind of fully automatic permanganate index analysis system as CN208297438U, is provided with controller, compri...

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Problems solved by technology

[0002] In the permanganate index analysis experiment, chemical reagents such as sulfuric acid or sodium hydroxide solution, potassium permanganate solution, and sodium oxalate solution need to be added in different steps. The accuracy and parallelism of the sample amount are poor, and the experiment is a conditional experiment. The amount and speed of the sample amount will directly lead to the difference in the measurement results, and there are obvious disadvantages

[0003] Along with the research and development of automation instrument, the device that adopts mechanical pump to replace manual sampling gradually appears on the market, discloses a kind of fully automatic permanganate index analysis system as CN208297438U, is provided with controller, comprises automatic sampling device, automatic The digestion device, the automatic sampling device includes a base one, a second turntable is arranged on the base one, a sample bottle is arranged on the second turntable, a third linear movement module is arranged above the second turntable, and a third linear movement module is arranged on the third turntable. There are cleaning tubes and sampling tubes. The automatic digestion device includes base 2. Along the length direction of base 2, there are first turntable, heating titration area and reagent bottle in sequence. Reaction bottles are arranged on the first turntable, and a second turntable is arranged above the first turntable. Two linear motion modules, the second linear motion module is provided with a sample tube and a pure water tube, the sample tube and the sample tube are connected by a peristaltic pump, a titration rod is provided above the heating titration area, and the reagent bottle They are respectively connected to the pure water pipe and the burette. The second base is equipped with a first linear motion module, and the first linear motion module is equipped with an electric gripper. However, in the above device, some peristaltic pump sampling schemes cannot Completely solve the problem of sampling accuracy caused by the pulsation of the peristaltic pump. The solution of the syringe pump also has problems such as cross-contamination of the pipeline, failure to automatically clean, and cumbersome flow path design.

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