Automatic calibration device for trace online TOC (Total Organic Carbon) monitor

Abstract

The utility model provides an automatic calibration device for a trace online TOC monitor, and relates to the technical field of ultrapure water TOC detection, the automatic calibration device comprises a mixer, one side of the mixer is connected with a connecting assembly, the connecting assembly comprises a ceramic pump, one side of the ceramic pump is connected with a 25ml injection pump, the top of one side of the 25ml injection pump is connected with a first two-way electromagnetic valve, and the top of the other side of the ceramic pump is connected with a second two-way electromagnetic valve. The top of the other side of the 25ml injection pump is connected with a second two-way electromagnetic valve, one side of the second two-way electromagnetic valve is connected with a connecting pipe, the front end of the mixer is connected with a PLC, and the other side of the mixer is connected with a 200ml injector. According to the on-line TOC analyzer disclosed by the utility model, after being mixed by the mixer, the three-way electromagnetic valve mixer injects diluted standard liquid into a sample inlet of the on-line TOC analyzer at a constant flow velocity of 20mL / min. The whole dilution and sample introduction process is carried out in a sealed system, so that the contact between the standard solution and the outside is reduced to the greatest extent, and the in-situ automatic calibration of the on-line TOC analyzer is realized.

Description

Technical Field

[0001] This utility model relates to the field of ultrapure water TOC detection technology, and in particular to an automatic calibration device for a trace online TOC monitor. Background Technology

[0002] The automatic calibration technology of domestic online TOC monitors is still mainly based on semi-automatic or manual calibration. The fully automatic calibration function is not yet mature. Core components (such as high-precision sensors and dynamic standard dispensers) rely on imports, and the high-end market (such as semiconductor ultrapure water monitoring) is monopolized by imported brands.

[0003] Reliance on imported core components: The localization rate of high-precision sensors is less than 20%, and there is an urgent need to break through material and process bottlenecks. Insufficient algorithm stability: Domestic equipment has weak anti-interference ability in complex environments, and it is necessary to strengthen basic research and data accumulation. Policy-driven: Environmental protection "dual carbon" targets and GMP certification requirements in the pharmaceutical industry have driven a surge in demand for water quality monitoring, which in turn has driven the growth in demand for high-precision automatic calibration devices.

[0004] However, the existing traditional manual dilution process is cumbersome and involves many steps, resulting in a long calibration process that cannot meet the needs of rapid and efficient production monitoring and affects the overall production rhythm. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the existing traditional manual dilution process is cumbersome and involves many steps, resulting in a long calibration process that cannot meet the needs of rapid and efficient production monitoring and affects the overall production rhythm.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an automatic calibration device for a micro-volume online TOC monitor, comprising a mixer, a connecting assembly connected to one side of the mixer, the connecting assembly comprising a ceramic pump, a 25ml syringe pump connected to one side of the ceramic pump, a first two-way solenoid valve connected to the top of one side of the 25ml syringe pump, a second two-way solenoid valve connected to the top of the other side of the 25ml syringe pump, a connecting tube connected to one side of the second two-way solenoid valve, a PLC connected to the front end of the mixer, a 200ml syringe connected to the other side of the mixer, a three-way solenoid valve connected to the bottom of the 200ml syringe, and an outlet tube connected to one side of the three-way solenoid valve.

[0007] Furthermore, one end of the connecting tube is connected to the mixer, and the ceramic pump and the 25ml syringe pump are connected through a pipeline. The high-precision ceramic syringe pump and the 25ml syringe pump are connected for communication through PLC conversion.

[0008] Furthermore, the bottom of the mixer is connected to a stirring assembly, which includes a stirring motor. The output end of the stirring motor is connected to a magnetic suction rod. The stirring assembly can achieve proportional dilution of the stock solution and the blank solution.

[0009] Furthermore, the mixer is equipped with a stirring rod inside, a magnetic rod is connected to the bottom of the stirring rod, and rubber scrapers are connected to both sides of the stirring rod, which can clean the inner wall.

[0010] Furthermore, the rubber scraper is internally fitted with bolts, and the stirring rod is connected to a first gear on the surface near the magnet rod. Second gears are connected to both sides of the first gear. The bolt fixing method allows for easy disassembly and assembly of the rubber scraper.

[0011] Furthermore, the rubber scraper is internally fitted with bolts, and the stirring rod is connected to a first gear on the surface near the magnet rod. The first gear is connected to two second gears on both sides, and the first gear can simultaneously drive two sets of second gears to rotate.

[0012] Furthermore, a set of flipping plates is connected to one side of each of the two sets of second gears. The first gear meshes with the two sets of second gears, and the second gear can rotate the flipping plates to improve mixing efficiency.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this invention, after mixing by a mixer, the diluted standard solution is injected into the inlet of the online TOC analyzer at a constant flow rate of 20 mL / min through a three-way solenoid valve. The entire dilution and injection process is carried out in a sealed system, minimizing the contact between the standard solution and the outside environment, and enabling in-situ automatic calibration of the online TOC analyzer.

[0015] 2. In this utility model, during mixing, the stirring rod can be driven to rotate by magnetic connection, which in turn drives the first gear and the second gear to mesh and connect, and the mixing efficiency is improved by the flip plate. Attached Figure Description

[0016] Figure 1 This utility model presents a three-dimensional structural schematic diagram of an automatic calibration device for a trace online TOC monitor;

[0017] Figure 2 This invention presents a cross-sectional structural schematic diagram of an automatic calibration device for a trace online TOC monitor.

[0018] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 A partial exploded structural diagram of the automatic calibration device for the micro-volume online TOC monitor proposed in this utility model.

[0020] Legend: 1. Mixer; 2. Connecting assembly; 201. Ceramic pump; 202. 25ml syringe pump; 203. First two-way solenoid valve; 204. Second two-way solenoid valve; 205. Connecting pipe; 206. PLC; 207. 200ml syringe; 208. Three-way solenoid valve; 209. Discharge pipe; 3. Stirring assembly; 301. Stirring motor; 302. Magnetic rod; 303. Magnetic rod; 304. Stirring rod; 305. Rubber scraper; 306. Bolt; 307. First gear; 308. Second gear; 309. Tilting plate. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1, as Figure 1 - Figure 3 As shown, this utility model provides an automatic calibration device for a micro-volume online TOC monitor, including a mixer 1. A connecting component 2 is connected to one side of the mixer 1. The connecting component 2 includes a ceramic pump 201. A 25ml syringe pump 202 is connected to one side of the ceramic pump 201. A first two-way solenoid valve 203 is connected to the top of one side of the 25ml syringe pump 202. A second two-way solenoid valve 204 is connected to the top of the other side of the 25ml syringe pump 202. A connecting pipe 205 is connected to one side of the second two-way solenoid valve 204. A PLC 206 is connected to the front end of the mixer 1. A 200ml syringe 207 is connected to the other side of the mixer 1. A three-way solenoid valve 208 is connected to the bottom of the 200ml syringe 207. An outlet pipe 209 is connected to one side of the three-way solenoid valve 208.

[0024] like Figure 1 As shown, one end of the connecting pipe 205 is connected to the mixer 1. The ceramic pump 201 and the 25ml syringe pump 202 are connected through a pipe. The high-precision ceramic syringe pump 201 and the 25ml syringe pump 202 are connected by a PLC conversion.

[0025] like Figure 3As shown, the bottom of the mixer 1 is connected to a stirring assembly 3, which includes a stirring motor 301. The output end of the stirring motor 301 is connected to a magnetic suction rod 302. The stirring assembly 3 can realize the proportional dilution of the stock solution and the blank solution.

[0026] like Figure 2 As shown, the mixer 1 is equipped with a stirring rod 304 inside, a magnetic rod 303 is connected to the bottom of the stirring rod 304, and rubber scrapers 305 are connected to both sides of the stirring rod 304. The rubber scrapers 305 can clean the inner wall.

[0027] like Figure 4 As shown, a bolt 306 is inserted inside the rubber scraper 305, and a first gear 307 is connected to the surface of the stirring rod 304 near the magnet rod 303. A second gear 308 is connected to both sides of the first gear 307. The bolt 306 can be used to easily disassemble and assemble the rubber scraper 305.

[0028] like Figure 3 - Figure 4 As shown, a bolt 306 is inserted into the inside of the rubber scraper 305, and a first gear 307 is connected to the surface of the stirring rod 304 near the magnet rod 303. A second gear 308 is connected to both sides of the first gear 307, and the first gear 307 can drive the two sets of second gears 308 to rotate simultaneously.

[0029] like Figure 2 - Figure 4 As shown, each of the two sets of second gears 308 is connected to a set of tilting plates 309 on one side. The first gear 307 meshes with the two sets of second gears 308, and the second gears 308 can rotate the tilting plates 309 to improve mixing efficiency.

[0030] The overall effect of this embodiment is that the main purpose of this device is to solve the automatic calibration of online TOC analyzers at the low concentration (μg / L) level. This device mainly consists of a 5mL high-precision ceramic pump 201, a 25mL syringe pump 202, a mixer 1, and a 200mL syringe 207. A PLC 206 is used to establish a communication connection between the high-precision ceramic pump 201 and the 25mL syringe pump 202, establishing a correspondence between the number of steps of the syringe pump plunger and the volume of water sample drawn. The dilution factor can be calculated based on the high-concentration TOC standard stock solution and the low-concentration standard value required for calibration of the online TOC analyzer. This command is sent to the high-precision ceramic pump 201 and the 25ml syringe pump 202 to draw up the stock solution and blank solution, inject them into the magnetic stirrer for proportional dilution, and draw the diluted standard solution into the 200ml syringe 207 through the three-way solenoid valve 208. At the same time, the stepper motor is fixed on the plunger rod of the 200ml syringe 207, and the stepper motor is given a command to inject the sample. The diluted standard solution is injected into the injection port of the online TOC analyzer at a constant flow rate of 20mL / min through the three-way solenoid valve 208. The entire dilution and injection process is carried out in a sealed system, minimizing the contact between the standard solution and the outside environment, and enabling in-situ automatic calibration of the online TOC analyzer. During mixing, the stirring motor 301 can be turned on, so that the output of the stirring motor 301 can drive the magnetic rod 302 to rotate. In turn, the magnetic rod 302 can drive the magnetic rod 303 to rotate through magnetic connection, thereby driving the stirring rod 304 to stir the inside of the mixer 1. When the stirring rod 304 rotates, it also drives the first gear 307 to rotate, so that the first gear 307 can drive the two sets of second gears 308 to mesh and rotate. In turn, the second gears 308 drive the flip plate 309 to stir and flip the inside of the mixer 1, improving the mixing efficiency. The rubber scraper 305 can clean the inner wall. The rubber scraper 305 can also be replaced by removing the bolts 306.

[0031] Working principle: After mixing via the three-way solenoid valve of mixer 1, the diluted standard solution is injected into the inlet of the online TOC analyzer at a constant flow rate of 20 mL / min. The entire dilution and injection process is carried out in a sealed system, minimizing the contact between the standard solution and the outside environment, and enabling in-situ automatic calibration of the online TOC analyzer. During mixing, the stirring rod 304 can be rotated by magnetic connection, which in turn drives the first gear 307 and the second gear 308 to mesh. The mixing efficiency is improved by the flip plate 309.

[0032] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. An automatic calibration device for a trace online TOC monitor, comprising a mixer (1), characterized in that: A connecting component (2) is connected to one side of the mixer (1); The connecting assembly (2) includes a ceramic pump (201), a 25ml syringe pump (202) connected to one side of the ceramic pump (201), a first two-way solenoid valve (203) connected to the top of one side of the 25ml syringe pump (202), a second two-way solenoid valve (204) connected to the top of the other side of the 25ml syringe pump (202), a connecting pipe (205) connected to one side of the second two-way solenoid valve (204), a PLC (206) connected to the front end of the mixer (1), a 200ml syringe (207) connected to the other side of the mixer (1), a three-way solenoid valve (208) connected to the bottom of the 200ml syringe (207), and an outlet pipe (209) connected to one side of the three-way solenoid valve (208).

2. The automatic calibration device for the trace online TOC monitor according to claim 1, characterized in that: One end of the connecting tube (205) is connected to the mixer (1), and the ceramic pump (201) and the 25ml syringe pump (202) are connected by a pipe.

3. The automatic calibration device for the trace online TOC monitor according to claim 2, characterized in that: The bottom of the mixer (1) is connected to a stirring assembly (3), which includes a stirring motor (301) and a magnetic suction rod (302) connected to the output end of the stirring motor (301).

4. The automatic calibration device for the trace online TOC monitor according to claim 3, characterized in that: The mixer (1) is equipped with a stirring rod (304) inside. A magnet rod (303) is connected to the bottom of the stirring rod (304). Rubber scrapers (305) are connected to both sides of the stirring rod (304).

5. The automatic calibration device for the trace online TOC monitor according to claim 4, characterized in that: Bolts (306) are inserted into the inside of the rubber scraper (305), and a first gear (307) is connected to the surface of the stirring rod (304) near the magnet rod (303). A second gear (308) is connected to both sides of the first gear (307).

6. The automatic calibration device for the trace online TOC monitor according to claim 5, characterized in that: Each of the two sets of second gears (308) is connected to a set of flip plates (309) on one side, and the first gear (307) meshes with the two sets of second gears (308).

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