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CN-117030637-B - Solid sample detection device

CN117030637BCN 117030637 BCN117030637 BCN 117030637BCN-117030637-B

Abstract

The invention relates to the technical field of detection equipment, in particular to a solid sample detection device which comprises an accurate liquid injection system, wherein the accurate liquid injection system is used for accurately controlling the injection amount of a reagent injected into a collecting bottle or a reaction tank, the accurate liquid injection system comprises a liquid injection pipeline, a first one-way valve, a quantitative pump, a liquid injection needle, a clear water pipeline, a clear water bottle, a clear water pump, a first control valve and a second one-way valve, when the quantitative pump stops working, the first control valve is restored to a normally open initial station under the action of an internal reset piece of the quantitative pump so as to be communicated with the clear water pipeline, and the clear water pump works and is used for pumping clear water in the clear water bottle into a first liquid section so as to wash the first liquid section, the quantitative pump and the second liquid section, and further pumping the residual reagent in the first liquid section, the quantitative pump and the second liquid section into the collecting bottle or the reaction tank through the clear water. The preparation is made for the subsequent pumping of other reagents, the mutual interference and influence of different reagents are avoided, and the accuracy of reagent input dosage is ensured.

Inventors

  • MENG XUE
  • Lv Qingbin
  • ZHAO HAIBO
  • LIN QING

Assignees

  • 北京市计量检测科学研究院

Dates

Publication Date
20260512
Application Date
20230614

Claims (8)

  1. 1. The solid sample detection device is characterized by comprising a precise liquid injection system, wherein the precise liquid injection system is used for precisely controlling the injection amount of the reagent injected into a collecting bottle or a reaction tank; the accurate liquid injection system comprises an infusion pipeline, a first one-way valve, a quantitative pump, a liquid injection needle, a clear water pipeline, a clear water bottle, a clear water pump, a first control valve and a second one-way valve; the input end of the infusion pipeline is connected with a liquid storage bottle, the output end of the infusion pipeline is connected with the liquid injection needle, and the infusion pipeline is sequentially provided with the first one-way valve and the quantitative pump for pumping the reagent in the liquid storage bottle into a collecting bottle or a reaction tank; The first one-way valve is used for limiting one-way flow of the reagent from the liquid storage bottle to the liquid injection needle; The infusion pipeline comprises a first liquid section arranged between the first one-way valve and the quantitative pump and a second liquid section arranged between the quantitative pump and the liquid injection needle; One end of the clear water pipeline is connected with the clear water bottle, and the other end of the clear water pipeline is connected with the first liquid section; The clear water pipeline is sequentially provided with the clear water pump, a first control valve and a second one-way valve; the second one-way valve is used for limiting one-way flow from the clear water bottle to the first liquid section; When the quantitative pump works, part of reagent in the second liquid section enters the control port of the first control valve through the first control pipeline, and the reset force of a reset piece in the first control valve is overcome to force the first control valve to replace a working position so as to disconnect the clear water pipeline; When the quantitative pump stops working, the first control valve is restored to a normally open initial station under the action of an internal reset piece of the quantitative pump so as to be communicated with the clear water pipeline, and the clear water pump works to pump clear water in the clear water bottle into the first liquid section, further wash the first liquid section, the quantitative pump and the second liquid section, and further pump the residual reagent in the first liquid section, the quantitative pump and the second liquid section into a collecting bottle or a reaction tank through the clear water pump; comprises a gas pipeline; one end of the air pipeline is connected with a dry air source, and the other end of the air pipeline is connected with the first liquid section; the third one-way valve is used for limiting one-way flow of the drying gas from a drying gas source to the first liquid path section; When the quantitative pump works, part of reagent in the second liquid section enters the control port of the second control valve through the second control pipeline, and the reset force of a reset piece in the second control valve is overcome to force the second control valve to change the working position so as to disconnect the gas pipeline; when the quantitative pump stops working, the second control valve is restored to a normally open initial station under the action of the internal reset piece of the second control valve so as to be communicated with the gas pipeline, the air pump works and is used for pumping dry gas into the first liquid section so as to air-dry the second liquid section, the quantitative pump and the second liquid section, namely, residual liquid in the first liquid section, the quantitative pump and the second liquid section is removed.
  2. 2. The solid sample testing device according to claim 1, wherein the control host is connected to the clean water pump for controlling the start time, the operation time and the clean water dosage of the flushing pipeline.
  3. 3. The solid sample detection device according to claim 1, further comprising an out-multiple-in reversing valve, wherein a plurality of input ports of the out-multiple-in reversing valve are respectively connected with a plurality of liquid storage bottles through different input branches, and an output port of the out-multiple-in reversing valve is connected with an input end of the infusion pipeline, so that the infusion pipeline can be selectively connected with one of the liquid storage bottles, and further conveying of different reagents is realized.
  4. 4. The solid sample detection device according to claim 1, wherein when the dosing pump works, the pressure in the second liquid path section is defined as the reagent pressure, the set pressure of the control port of the first control valve is a first threshold pressure, the set pressure of the control port of the second control valve is a second threshold pressure, and the reagent pressure is respectively larger than the first threshold pressure and the second threshold pressure, so that the control of the first control valve and the second control valve is realized.
  5. 5. The solid sample detection device according to claim 1, wherein when the clear water pump works, the pressure in the second liquid path section is defined as clear water pressure, and the clear water pressure is smaller than the first threshold pressure and the second threshold pressure, so that the first control valve and the second control valve are prevented from being controlled.
  6. 6. The solid sample testing device according to claim 1, wherein when the air pump is operated, the pressure in the second fluid path section is defined as a gas pressure, and the gas pressure is less than the first threshold pressure and the second threshold pressure, thereby avoiding control of the first control valve and the second control valve.
  7. 7. The solid sample detection device according to claim 2, wherein the control host is connected to the air pump for controlling the start time and the operation time of the air pump.
  8. 8. The solid sample detection device according to claim 1, wherein an air filter device is provided on the gas line for filtering the dry gas.

Description

Solid sample detection device Technical Field The invention relates to the technical field of detection equipment, in particular to a solid sample detection device. Background In the field of solid sample chemical element detection, the content of chemical elements in a solid sample to be detected is detected, and a specific solid sample is firstly required to be pretreated, wherein the pretreatment method comprises a chemical digestion method, an alkali extraction method and the like. The method for detecting the semi-volatile organic matters of the solid sample can adopt a rapid solvent extraction method and has the advantages of small organic solvent consumption, rapidness and high recovery rate. The fast solvent extraction process is one kind of automatic organic solvent extraction process under raised temperature and pressure, and the main current apparatus is imported. The pretreatment of the sample generally comprises the steps of sample decomposition, solvent extraction, sample filtration, quantitative concentration and the like, and in the pretreatment process, the pretreatment reaction processes of a chemical digestion method, a rapid solvent extraction method, an alkali extraction method and the like are required to be carried out, and the operation steps of chemical dissolution, filtration, flushing, acid removal, nitrogen blowing concentration, pH value adjustment, constant volume and the like are carried out. In addition, a plurality of instruments such as a graphite digestion instrument, a solvent extraction instrument, a filtering device, a nitrogen blowing concentrator and the like are configured in a laboratory, so that the equipment occupies a large space, the degree of automation is low, and the cost of sample detection is high. In view of the foregoing, there is a need for a solid sample detection device. Disclosure of Invention The application aims to provide a solid sample detection device so as to solve the technical problem of high sample detection cost in the prior art. The application relates to a split application with the original application number 2023107053668 and the name of 'a high-flux integrated solid sample detection device'. In order to solve the technical problems, the high-flux integrated solid sample detection device provided by the invention comprises a reaction tank and a heating module, wherein the reaction tank is arranged in a machine body and is used for containing a sample, the reaction tank is arranged in the heating module, and the heating module is used for heating the reaction tank; the heating module at least comprises a water bath oscillation heating unit, a graphite digestion heating unit, a multi-site magnetic stirring heating unit and a metal bath heating unit, wherein the four heating modules are respectively used for sample pretreatment in different method steps, and each heating module is detachably and fixedly connected with the machine body. Through the technical scheme of the improvement, when facing different processing steps, the four heating modules are selected according to the temperature required by the current processing step, the heating modules are fixedly connected with the machine body, and then the reaction tank is placed in the heating modules, so that one device can process the work of a plurality of original devices, and the purposes of saving space, automatically operating and reducing the cost of sample pretreatment are achieved. Further, each heating module is electrically connected with the machine body through an aviation plug. Through the technical scheme of above-mentioned improvement, with heating module and organism quick electric connection through aviation plug's form, the convenience when promoting heating module and changing. Furthermore, each heating module is detachably and fixedly connected with the machine body through a hasp. Through the technical scheme of the improvement, the mechanical connection between the instant heating module and the machine body is improved through the hasp, and the stability of the heating module after being connected with the machine body is improved. Further, the organism still includes control host computer and collecting bottle, the collecting bottle is provided with a plurality of, and a plurality of the collecting bottle is all placed in the top of retort, the collecting bottle is used for collecting the liquid after the sample heating reaction, the collecting bottle passes through the vacuum pump and is connected with the retort, control host computer is used for adding reagent to retort and collecting bottle. Preferably, the collecting bottle is placed on a collecting tray, a multi-position magnetic stirrer is arranged on the collecting tray, the multi-position magnetic stirrer is positioned at the bottom end of the collecting bottle, and the multi-position magnetic stirrer is used for magnetically stirring liquid in the collecting bottle. Preferably, the collecting tray is fixe