CN204925138U - Automatic titration acidity analysis appearance - Google Patents

Abstract

The utility model relates to an automatic titration acidity analyzer, comprising a chemical analysis chamber and a control device for controlling the work of the chemical analysis chamber; the control device includes a controller; The liquid inlet peristaltic pump, the liquid discharge peristaltic pump and the reagent pump connected by pipelines and the pH electrode inserted into the analysis pool; the controller is used to control the work of the liquid inlet peristaltic pump, the liquid discharge peristaltic pump and the reagent pump, and is used for receiving and testing The potential change of the pH electrode is used to determine the transition potential to determine the titration end point. The controller can accurately control the titration of titration reagents, and feedback the detection results to the control center in time, with high precision, simple and easy operation, and only a small number of personnel are required for monitoring and maintenance when the instrument is working; in addition, the automatic titration acidity analyzer described in the utility model There are also functions such as electrode calibration, intelligent titration, liquid leakage alarm, and data remote communication.

Description

Automatic Titration Acidity Analyzer

technical field

The utility model relates to an analysis device, in particular to an automatic titration acidity analyzer.

Background technique

With the improvement of people's living standards, people's requirements for drinking water are getting higher and higher. Qualified water quality is fundamental to ensure people's health. However, due to serious air pollution and emissions from chemical plants, water quality testing is particularly important. At present, the structure of the automatic titration water quality analyzer on the market mainly has the following two types: analog control, which is transformed from an ordinary glass burette, and a titration end point control circuit is added. The shape is similar to an ordinary burette. Titration analysis with low requirements, but this kind of automatic titrator has few functions and poor precision, and many titration operations cannot be completed; digital control, automatic burette and automatic titrator with digital discrimination titration end point, this control system can be controlled by a single chip microcomputer, or It can be controlled by a microcomputer as the upper computer, which can correspond to the titration operation of the potential change of the liquid to be tested, but most of them are large in size and heavy in weight, which is not conducive to carrying, and the accuracy of the instrument is uneven. In addition, in the water quality analyzer, as the number of measurements increases, the reaction products will adhere to the inner wall of the sample cell, so the absorbance intensity during measurement will gradually weaken, causing the measured value to change and affecting the stability of the instrument. , so it is very important to clean the sample cell in time.

Utility model content

In order to solve the above technical problems, the utility model provides an automatic titration acidity analyzer, the technical solution is:

The utility model provides an automatic titration acidity analyzer. The automatic titration acidity analyzer includes a chemical analysis chamber and a control device for controlling the work of the chemical analysis chamber; the control device includes a controller; the chemical analysis chamber includes an analysis chamber. The liquid inlet peristaltic pump, the liquid discharge peristaltic pump and the reagent pump connected to the analysis pool through pipelines, and the pH electrode inserted into the analysis pool; the controller is used to control the liquid intake peristaltic pump, the liquid discharge peristaltic pump and the reagent pump It works and is used to receive and detect the potential change of the pH electrode, and judge the transition potential to judge the titration end point.

The automatic titration acidity analyzer of the utility model is a continuous working process from sampling to reagent titration, and data is shared between each link; the controller can accurately control the titration of titration reagents, and feedback the detection results to the control center in time, with high precision, Simple and easy to operate, only a small number of personnel are required for monitoring and maintenance when the instrument is working.

Further, a test cup is provided in the analysis pool, and a drain port is provided at the bottom of the test cup, which is convenient for cleaning and maintenance.

Further, the chemical analysis chamber in the automatic titration acidity analyzer also includes two Y-shaped connectors and 4 pinch valves connected to the controller; the liquid inlet peristaltic pump is connected to one end of the Y-shaped connector , the other two ends of the Y-shaped connector are respectively connected to the deionized water tank and the sample water tank through the liquid inlet pipeline, and the two pinch valves are respectively arranged on the liquid inlet pipeline. Control the incoming sample as deionized water or sample solution through the pinch valve and Y-type connector, through the switching of the incoming liquid between deionized water and sample, it can perform electrode calibration, clean the analysis cell, and infiltrate the analysis cell to prevent sample dilution The role of the analysis device is more accurate.

Furthermore, the drainage peristaltic pump is connected to one end of the Y-shaped connector, the other end of the Y-shaped connector is connected to the drain port through the drain line, and the third end is inserted into the drain port through the drain line. In the test cup; the two pinch valves are respectively arranged on the discharge pipeline. The liquid-discharging peristaltic pump performs constant treatment on the liquid to be tested in the test cup through the pipeline inserted into the test cup, and realizes the functions of controlling the liquid discharge and constant volume through the pinch valve and the Y-shaped connector, further improving the accuracy of the device.

Further preferably, the chemical analysis chamber of the automatic titration acidity analyzer further includes a stirring device, which is composed of a magnetic rotor in the test cup and a stirring motor fixed at the bottom of the analysis pool. The magnetic stirring is small and flexible, which ensures that the solution reacts fully during the titration process and improves the accuracy.

As a preference, the automatic titration acidity analyzer is also provided with a leakage alarm sensor, and the leakage alarm sensor transmits a signal to the controller to determine whether the instrument is leaking; adding a leakage alarm device greatly reduces the chance of damage.

Preferably, the control device also includes an input module, an output module, a switch module and an A/D conversion module connected to the controller, so as to realize data exchange between the external device and the controller; the input module includes digital Quantity input module, analog quantity input module and conditioning circuit module, the output terminal of described conditioning circuit module is connected with A/D conversion module, the input terminal of conditioning circuit module is connected with described pH electrode; Described output module comprises digital quantity An output module and an analog output module, the output module is used to control the work of the liquid inlet peristaltic pump, the reagent pump and the liquid discharge peristaltic pump; the switch module is used to control the start and stop of the pinch valve.

Preferably, the controller is provided with multiple RS485 interfaces; the control device also includes a touch screen and a wireless module connected to the controller through the RS485 interface; the wireless module is used to realize data communication between the controller and an external terminal.

Preferably, the automatic titration analysis device also includes a management center, and the controller can communicate with the management center through the RS485 interface or the analog 4-20 signal, so as to realize uploading of results, uploading of alarms and remote start-stop operations.

The automatic titration analysis device described in the utility model, the controller is connected with a touch screen and a management center to realize the functions of remote operation, host management, key data display, system working parameter setting, working status monitoring, manual operation, and data recording. Provide technical support to technical managers.

The beneficial effects of the utility model are: the automatic titration analysis device of the utility model has high precision, can quickly and accurately determine the end point and automatically stop the titration. The liquid inlet device is connected to the sample water tank and connected to the deionized water tank at the same time. By switching the inlet liquid between deionized water and the sample, it plays the role of electrode calibration, cleaning the analysis pool, infiltrating the analysis pool to place sample dilution, and making the analysis The device is more precise. The liquid discharge device is connected with the constant volume port, which can carry out constant volume processing on the sample in the analysis pool, and at the same time play a constant volume role, further improving the accuracy of the device. The pump used in the device has a small structure and high precision, and can realize two functions, resulting in a simple and compact structure of the entire automatic titration analysis device, and the cooperation of various analysis components, easy maintenance of the instrument, low consumption of wearing parts, and long service life .

Description of drawings

Fig. 1. automatic titration acidity analyzer structural representation described in embodiment 1;

Fig. 2. automatic titration acidity analyzer structural representation described in embodiment 2;

Fig. 3. the schematic diagram of circuit structure of automatic titration acidity analyzer described in embodiment 2.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Example 1:

The utility model provides an automatic titration acidity analyzer. The automatic titration acidity analyzer includes a chemical analysis chamber and a control device for controlling the work of the chemical analysis chamber; the control device includes a controller; the chemical analysis chamber includes an analysis chamber. The liquid inlet peristaltic pump, the liquid discharge peristaltic pump and the reagent pump connected to the analysis pool through pipelines, and the pH electrode inserted into the analysis pool; the controller is used to control the liquid intake peristaltic pump, the liquid discharge peristaltic pump and the reagent pump It works and is used to receive and detect the potential change of the pH electrode, and judge the transition potential to judge the titration end point.

The analysis process is: the controller controls the peristaltic pump to discharge the sample to be tested into the analysis tank, the reagent pump starts to work, drips the titration reagent into the analysis tank, the controller collects the potential value of the pH electrode, when the potential value reaches the transition potential ( pH = 7), the reagent pump stops working, the liquid drainage peristaltic pump discharges the liquid in the analysis tank, the controller records the volume of the reagent dropped in and automatically calculates, and completes the water acidity analysis.

Example 2:

As shown in accompanying drawing 2, described automatic titration acidity analyzer is based on the analyzer of embodiment 1, is provided with stirring device, leakage alarm sensor, two Y-type connectors and 4 and controller in described chemical analysis chamber A connected pinch valve; a test cup is provided in the analysis pool, and a liquid discharge port is provided at the bottom of the test cup; one end of the Y-shaped connector is connected with the liquid inlet peristaltic pump, and the other two ends are respectively connected to the The deionized water tank is connected to the sample water tank, and pinch valves are respectively set on the inlet pipelines; the drainage peristaltic pump is connected to one end of the Y-shaped connector, and the other end of the Y-shaped connector is connected to the The liquid discharge ports are connected, and the third end is inserted into the test cup through the liquid discharge pipeline; the two pinch valves are respectively arranged on the liquid discharge pipeline.

The liquid-inlet peristaltic pump controls the incoming liquid to be deionized water or sample solution through the pinch valve and the Y-shaped connector. By switching the incoming liquid between deionized water and the sample, it can perform electrode calibration, clean the analysis pool, infiltrate The analysis pool prevents sample dilution and makes the analysis device more accurate; at the same time, the drainage peristaltic pump performs constant treatment of the liquid to be tested in the test cup through the pipeline inserted into the test cup, through the pinch valve and the Y-type The connector realizes the function of controlling liquid discharge and constant volume, further improving the accuracy of the device; both peristaltic pumps can realize two functions, resulting in a simple and compact structure of the entire automatic titration analysis device; the leakage alarm sensor will simulate 4-20mA The signal is transmitted to the controller to determine whether the instrument is leaking. Increase the liquid leakage alarm device, greatly reducing the chance of damage to the instrument.

Example 3

Based on the automatic titration acidity analyzer described in embodiment 3, the control device described in the utility model also includes an input module, an output module, a switch module and an A/D conversion module connected to the controller, so as to realize external equipment and control Data exchange between devices; the input module includes a digital input module, an analog input module and a conditioning circuit module, the output of the conditioning circuit module is connected to the A/D conversion module, and the input of the conditioning circuit module is connected to the The pH electrodes are connected, and the A/D conversion module is connected with the controller to realize the detection of the pH transition potential by the controller; the output module includes a digital output module and an analog output module, and the output module is used to control the The liquid peristaltic pump, the reagent pump and the liquid peristaltic pump work; the switching module is used to control the start and stop of the pinch valve.

In addition, the controller is provided with a plurality of RS485 interfaces, and the automatic titration acidity analyzer also includes a management center, and a touch screen and a wireless module connected to the RS485 interface on the controller; the controller can be connected through the RS485 interface Or the analog 4-20 signal communicates with the management center to realize result upload, alarm upload and remote start-stop operation; the wireless module is used to realize data communication between the controller and the external terminal.

The above-mentioned embodiments are only for describing the preferred implementation of the utility model, and are not intended to limit the scope of the utility model. All variations and improvements should fall within the protection scope determined by the claims of the present utility model.

Claims (10)

1. an automatic titration acidity analyzer, is characterized in that, described automatic titration acidity analyzer comprises chemical analysis chamber (1) and is used to control the control device (2) of chemical analysis chamber (1) work; Described control device (2) includes a controller (3); the chemical analysis chamber (1) includes an analysis pool (4), a liquid inlet peristaltic pump (5) connected to the analysis pool (4) through pipelines, a liquid discharge peristaltic pump ( 6) and the reagent pump (7) and the pH electrode (8) inserted in the analysis cell (4); the controller (3) is used to control the liquid inlet peristaltic pump (5), the liquid discharge peristaltic pump (6) and the reagent The pump (7) works, and is used for receiving and detecting the potential change of the pH electrode (8), and judging the transition potential so as to judge the titration end point. 2. The automatic titration acidity analyzer according to claim 1, characterized in that, the chemical analysis chamber (1) also comprises two Y-shaped connectors (9) and 4 clamps connected with the controller (3) Pipe valve (10). 3. automatic titration acidity analyzer as claimed in claim 2, is characterized in that, described liquid inlet peristaltic pump (5) links to each other with an end of Y-type connector (9), and the end of described Y-type connector (9) The other two ends are respectively connected to the deionized water tank (100) and the sample water tank (101) through the liquid inlet pipeline; the two pinch valves (10) are respectively arranged on the liquid inlet pipeline. 4. automatic titration acidity analyzer as claimed in claim 3, is characterized in that, is provided with test cup (11) in the described analysis pond (4), and described test cup (11) bottom is provided with drain outlet (12) ). 5. automatic titration acidity analyzer as claimed in claim 4, is characterized in that, described drainage peristaltic pump (6) links to each other with an end of Y-type connector (9), and the end of described Y-type connector (9) The other end is connected to the drain port (12) through the drain line, and the third end is inserted into the test cup (11) through the drain line; the two pinch valves (10) are respectively arranged on the drain line . 6. automatic titration acidity analyzer as claimed in claim 3, is characterized in that, described chemical analysis bin (1) also comprises stirring device, and described stirring device is made of magnetic rotor (13) in test cup (11) and It consists of a stirring motor (14) fixed at the bottom of the analysis pool (4). 7. automatic titration acidity analyzer as claimed in claim 1, is characterized in that, described chemical analysis chamber (1) also comprises leakage alarm sensor (15), and described leakage alarm sensor (15) and controller ( 3) connected. 8. automatic titration acidity analyzer as claimed in claim 6 is characterized in that, described control device (2) also comprises the input module (16) that links to each other with controller (3), output module (17), switch quantity Module (18) and A/D conversion module (19); Described input module (16) comprises conditioning circuit module (20), and the output terminal of described conditioning circuit module (20) and A/D conversion module (19) connection, the input end of the conditioning circuit module (20) is connected with the pH electrode (8); the output module (17) is used to control the liquid inlet peristaltic pump (5), the reagent pump (7) and the liquid discharge peristaltic pump (6) work; the switch module is used to control the start and stop of the pinch valve (10). 9. automatic titration acidity analyzer as claimed in claim 8, is characterized in that, described controller (3) is provided with a plurality of RS485 interfaces; Described control device (2) also comprises and controller (3) through A touch screen (21) and a wireless module (22) connected by an RS485 interface; the wireless module (22) is used to realize data communication between the controller (3) and an external terminal. 10. automatic titration acidity analyzer as claimed in claim 9, is characterized in that, described automatic titration analysis device also comprises management center (50), and described controller (3) can pass RS485 interface or analog quantity 4-20 The signal communicates with the management center (50) to realize uploading of results, uploading of alarms and remote start-stop operations.