Intelligent titrator with automatic solid reagent adding function

Abstract

This utility model discloses an intelligent titrator with automatic solid reagent addition function, relating to the field of titration detection technology. The titrator includes an automatic titration module, a liquid delivery module, a housing, and a control system. The core components are the solid magnetic boat and magnetic drive assembly within the automatic titration module. The control system, in conjunction with a sliding table, raises and lowers the magnetic support, using magnetic attraction to drive the solid magnetic boat to sink below the liquid surface along the inner wall of the titration container. Combined with magnetic stirring, this achieves automatic and precise addition and rapid dissolution of the solid reagent. Simultaneously, the liquid delivery module automatically delivers the reagent, and a colorimetric camera identifies the color, completing the entire titration process automatically. This solves the problems of low efficiency and large errors associated with manual addition of solid reagents, improving the accuracy and convenience of titration detection.

Description

Technical Field

[0001] This utility model relates to the field of detection technology and equipment, specifically to an intelligent titrator with an automatic solid reagent addition function. Background Technology

[0002] In fields such as chemical analysis, environmental monitoring, and food and drug testing, titration analysis is a commonly used quantitative analysis method. It relies on automatic titrators to achieve accurate liquid addition and endpoint determination. Although existing automatic titrators can automatically deliver and titrate liquid reagents through injection pumps and tubing, they still require manual weighing and addition of solid reagents into the titration container when necessary. This operation not only requires pausing the process, but also makes it easy for reagents to adhere to the container walls or tools, causing deviations between the actual amount used and the amount weighed. This results in problems such as cumbersome operation, low efficiency, and large reagent dosage errors. Therefore, developing equipment that can automatically add solid reagents, accurately control the amount, and is compatible with existing titration processes has become a key requirement for solving the above problems. Summary of the Invention

[0003] This invention aims to overcome the shortcomings of existing automatic titrators that cannot automatically add solid reagents, and provides an intelligent titrator with automatic solid reagent addition function, achieving automated and residue-free solid reagent addition while ensuring titration accuracy and operational safety. To achieve the above objectives, this invention adopts the following technical solution:

[0004] An intelligent titrator with automatic solid reagent addition function includes a housing, an automatic titration module, a liquid delivery module, and a control system.

[0005] The housing serves as the equipment support structure and includes a reagent bottle holder, a syringe pump housing, a main unit housing, and a main unit cover. The main unit cover has several pipeline channels for fixing and passing through the infusion tubing, preventing pipeline displacement from affecting the accuracy of liquid dispensing.

[0006] The automatic titration module is used to automatically add and stir liquid and solid reagents, including a magnetic stirrer, a solid magnetic boat, a slide table, a colorimetric camera, a backlight, a magnet holder, a magnetic boat magnet, and a slide table magnet. The solid magnetic boat is made of quartz glass or other inert material and contains a strong magnetic boat magnet. The solid magnetic boat has a wide-mouthed, shallow dish-shaped structure that can hold pre-weighed solid reagents. Compared with a deeper cup-shaped structure, the wide-mouthed, shallow dish-shaped structure is easier to rinse and leaves no residue.

[0007] The slide is installed inside the main housing. The slider of the slide is connected to the magnet bracket, and the slide magnet is fixed on the magnet bracket and attracts the magnet of the magnetic boat. The solid magnetic boat is in close contact with the inner wall of the titration container by magnetic attraction and its position is adjusted as the slide rises and falls.

[0008] The magnetic stirrer is installed inside the main unit housing and works with the stir bar to stir the solution in the titration container, accelerating the titration, while simultaneously flushing and accelerating the dissolution of the solid reagent in the solid magnetic boat.

[0009] The colorimetric camera is installed inside the main unit housing at the position corresponding to the titration container. It is used to capture the color of the liquid in the titration container in real time and transmit the image signal to the control system, which then determines the timing of adding each reagent or the titration endpoint.

[0010] The backlight is installed inside the main unit housing behind the corresponding titration container, providing a stable, uniform, and interference-free light source environment for the colorimetric camera. The backlight is linked with the camera and control system, automatically turning on when the device starts and turning off synchronously after titration, ensuring that the colorimetric camera can accurately capture color changes and providing a reliable basis for the control system to determine the timing of sample addition and the titration endpoint.

[0011] The liquid delivery module is used to deliver liquid reagents and includes several injection pumps, several reagent bottles, several suction tubes, and several infusion tubes. The reagent bottles are placed on the reagent bottle holder. One end of the suction tube extends into the reagent bottle and the other end is connected to the input end of the injection pump. One end of the infusion tube is connected to the output end of the injection pump, and the other end extends through the pipeline channel of the main unit cover to the top of the titration container. Its working principle is the same as that of a conventional titrator, ensuring accurate delivery of liquid reagents.

[0012] The control system is electrically connected to the automatic titration device, the liquid delivery device, and the camera, and is used to control the lifting and lowering of the slide, the start and stop of the syringe pump and the magnetic stirrer, and to receive camera signals.

[0013] Compared with conventional titrators, this invention has the following advantages:

[0014] Improve the accuracy of solid reagent addition: Solid reagents are carried by a solid magnetic boat made of corrosion-resistant and non-reactive material to avoid reagent contamination; at the same time, the lifting distance of the magnetic boat is precisely controlled by a sliding table, and liquid flushing ensures that there is no reagent residue, completely eliminating the error caused by residue during manual operation and ensuring the accuracy of analytical results.

[0015] Achieve automation and continuity in the titration process: There is no need to manually open the lid and add solid reagents. The control system can automatically trigger the addition of solid reagents, and the addition process is synchronized with the delivery, stirring and endpoint determination of liquid reagents, without interrupting the titration process. Compared with conventional titrators, it shortens the analysis time by 30%-50% and improves experimental efficiency.

[0016] Lowering the operational threshold and reducing environmental interference: Experimenters only need to weigh the solid reagents in advance and place them in the magnetic boat. The subsequent process is completed automatically by the equipment, reducing the impact of human operation differences on the results. At the same time, there is no need to open the lid, avoiding contamination of the titration system by moisture and impurities in the air, and further improving the repeatability of the experiment. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the automatic titration module according to an embodiment of the present invention.

[0020] Figure 3 This is a cross-sectional and partially enlarged schematic diagram of the automatic titration module according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the liquid delivery module structure of an embodiment of this utility model.

[0022] Figure 5 This is a schematic diagram of the casing structure of an embodiment of the present utility model.

[0023] The components include: 1. Automatic titration module, 101. Magnetic stirrer, 102. Solid magnetic boat, 103. Titration container, 104. Slide table, 105. Magnet support, 106. Magnet for the magnetic boat, 107. Magnet for the slide table, 108. Colorimetric camera, 109. Backlight; 2. Liquid delivery module, 201. Hydrochloric acid syringe pump, 202. Sodium hydroxide syringe pump, 203. Hydrochloric acid reagent bottle, 204. Sodium hydroxide reagent bottle, 205. Hydrochloric acid extraction tube, 206. Sodium hydroxide extraction tube, 207. Hydrochloric acid infusion tube, 208. Sodium hydroxide infusion tube; 3. Housing, 301. Reagent bottle holder, 302. Syringe pump housing, 303. Main unit housing, 304. Main unit cover, 305. Piping channel; 4. Control system. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. The present invention is not limited to the specific embodiments disclosed below.

[0025] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In this invention, based on the national standard GB / T 4209-2022, the determination of silicon dioxide content (7.7) is taken as an embodiment of this invention. It includes: a magnetic stirrer 101, a solid magnetic boat 102, a titration container 103, a slide table 104, a magnet support 105, a magnetic boat magnet 106, a slide table magnet 107, a colorimetric camera 108, a backlight 109, a hydrochloric acid injection pump 201, a sodium hydroxide injection pump 202, a hydrochloric acid reagent bottle 203, a sodium hydroxide reagent bottle 204, a hydrochloric acid extraction tube 205, a sodium hydroxide extraction tube 206, a hydrochloric acid infusion tube 207, and a sodium hydroxide infusion tube 208, a reagent bottle holder 301, an injection pump housing 302, a main unit housing 303, a main unit cover 304, a pipeline channel 305, and a control system 4.

[0026] Before the titration test begins, the tester adds 50 ml of the test solution to the titration container 103 and places a stir bar into it. Then, 3 g of solid sodium fluoride is weighed and added to the solid magnetic boat 102. The titration container 103 is placed in the designated position, and the solid magnetic boat 102 adheres to the inner wall of the titration container through the magnetic attraction between the magnetic boat magnet 106 and the sliding table magnet 107. The main unit cover 304 is closed, and the hydrochloric acid infusion tube 207 and the sodium hydroxide infusion tube 208, which are fixed by the pipeline channel 305, are inserted into the titration container 103. The titration is started through the control system 4. The control system 4 starts the magnetic stirrer 101 and the hydrochloric acid injection pump 201. Magnetic stirrer 101 stirs the test solution in titration container 103. Simultaneously, slide table 104 lowers magnetic support 105 a preset distance, causing the solid magnetic boat 106 to sink below the liquid surface due to the magnetic attraction between the magnetic boat magnet 106 and the slide table magnet 107. The stirred test solution continuously washes the solid magnetic boat 106, flushing out and accelerating the dissolution of the sodium fluoride inside, thus completing the precise addition of the solid reagent. Hydrochloric acid injection pump 201 draws a certain amount of standard hydrochloric acid titration solution from hydrochloric acid reagent bottle 203 along hydrochloric acid extraction tube 205 for later use. Colorimetric camera 108 captures the color of the liquid in titration container 103 in real time and transmits the signal to control system 4. When control system 4 detects that the solution in titration container 103 has turned yellow, it controls... System 4 immediately controls the hydrochloric acid injection pump 201 to continuously inject the extracted hydrochloric acid standard titration solution into the titration container 103 along the hydrochloric acid infusion tube 207 for titration. After titration until the red color remains unchanged, an excess of 3 ml is added, and the control system 4 records the total titration volume of the hydrochloric acid standard titration solution. The control system 4 then starts the sodium hydroxide injection pump 202 to extract a certain amount of sodium hydroxide solution from the sodium hydroxide reagent bottle 204 along the sodium hydroxide extraction tube 206 and continuously inject it into the titration container 103 along the sodium hydroxide infusion tube 208 for titration. The control system 4 judges the titration endpoint based on the color change in the titration container 103. When the solution color turns yellow again, the control system determines that the titration endpoint has been reached, stops the delivery of sodium hydroxide solution, and then processes and analyzes the data to complete the titration.

Claims

1. A smart titrator with automatic solid reagent addition function, characterized in that, The system includes a liquid delivery module, a housing, and a control system; it also includes a solid magnetic boat, a slide table, a magnet support, a magnetic boat magnet, and a slide table magnet. The solid magnetic boat is used to hold solid reagents, and the magnetic boat magnet is encased inside the solid magnetic boat. The slide table magnet is fixed to the magnet support, and the solid magnetic boat is attached to the inner wall of the titration container by the magnetic attraction between the magnetic boat magnet and the slide table magnet. The slide table is connected to the magnet support and can drive the magnet support and slide table magnet to rise and fall, thereby driving the solid magnetic boat to descend along the inner wall of the container below the liquid surface, realizing automatic addition of solid reagents. The control system is electrically connected to the slide table and is used to control the rise and fall of the slide table to regulate the timing and process of adding solid reagents.

2. The intelligent titrator with automatic solid reagent addition function according to claim 1, characterized in that, The solid magnetic boat is shaped like a wide-mouthed, shallow dish. Its wide-mouthed structure is suitable for loading solid reagents and rinsing with solution, while its shallow dish shape can reduce solid reagent residue.

3. The intelligent titrator with automatic solid reagent addition function according to claim 1, characterized in that, The magnetic boat magnet is encased inside a solid magnetic boat, and the sliding table magnet is fixed to the magnet support.

Images