Measurement control device for pH value flow cell

Abstract

The utility model discloses a pH value flow cell measurement control device, which relates to the field of measurement devices and comprises a base, a flow cell is fixedly mounted at the top end of the outer surface of the base, a motor is fixedly mounted at the top end of the outer surface of the flow cell, and a rotating rod is mounted at the output end of the motor and penetrates through the outer surface of the flow cell. A mounting sleeve is mounted at the bottom end of the shaft surface of the rotating rod, a paddle is mounted at the middle end of the shaft surface of the mounting sleeve, a gas importer is arranged at the position, located at the rear end of the rotating rod, of the top end in the flow cell, and more accurate pH value control is achieved by adopting a high-precision sensor, a high-precision actuator and a complex control algorithm; measures such as temperature control, pressure monitoring and automatic electrode cleaning are adopted, the stability and reliability of the system are improved, automatic control and data management of the system are achieved through a PLC and special software, manual intervention is reduced, data such as pH values recorded and analyzed through a display screen are reduced, and process monitoring and optimization are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of measuring device, concretely relates to a pH value flow cell measurement control device. BACKGROUND

[0002] PH meter, also known as acidity meter, is a kind of instrument for determining the pH value of solution. It estimates the hydrogen ion concentration by measuring the electrochemical characteristics of solution, so as to determine the acid-base degree of solution. It should be noted that PH electrode has certain chemical characteristics, and once it is separated from liquid for more than two hours, it can cause damage, thereby losing the measuring ability. In many chemical plants, PH meter is an important tool for monitoring the pH value of sewage.

[0003] The existing device usually adopts low-precision sensor and actuator, and the control algorithm is relatively simple, resulting in low pH value control precision, which is difficult to meet the demand of high-precision application, which can cause problems such as reduction of reaction yield and unstable product quality. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, a pH value flow cell measurement control device is provided, which solves the problem of insufficient precision of the existing device in the background technology.

[0005] To achieve the above purposes, the technical scheme adopted by the utility model is as follows:

[0006] A pH value flow cell measurement control device, comprising: a base, a flow cell is fixedly installed at the top end of the outer surface of the base, a motor is fixedly installed at the top end of the outer surface of the flow cell, a rotating rod is installed at the output end of the motor and penetrates the outer surface of the flow cell, an installation sleeve is installed at the bottom end of the shaft surface of the rotating rod, a paddle is installed at the middle end of the shaft surface of the installation sleeve, and a gas introducer is arranged at the rear end of the rotating rod inside the flow cell.

[0007] Preferably, a PH composite electrode is arranged at the rear end of the flow cell, a reference electrode is installed at the front end of the flow cell, a pressure sensor is installed at the right side of the flow cell, and a temperature sensor is installed at the left side of the flow cell.

[0008] Preferably, a three-way valve is installed at the top end of the outer surface of the gas introducer and penetrates the outer surface of the flow cell, and a valve is installed at the connection between the three-way valve and the gas introducer.

[0009] Preferably, a third connecting pipe is installed at the left side output end of the three-way valve, a second peristaltic pump is fixedly installed at the bottom end of the outer surface of the third connecting pipe, and a fourth connecting pipe is installed at the output end of the second peristaltic pump.

[0010] Preferably, the fourth connecting pipe is provided with an acid-base storage bottle at the bottom of the axial surface, the outer surface of the three-way valve is provided with a first connecting pipe at the right side, the bottom of the axial surface of the first connecting pipe is provided with a first peristaltic pump,

[0011] Preferably, the output end of the first peristaltic pump is provided with a second connecting pipe, the bottom of the axial surface of the second connecting pipe is provided with a cleaning liquid storage bottle, and the side of the axial surface of the second connecting pipe close to the cleaning liquid storage bottle is provided with an electrode cleaner.

[0012] Preferably, the outer surface of the base is provided with a PLC controller at the front end, the outer surface of the PLC controller is provided with a touch screen, and the outer surface of the base is provided with an anti-skid pad at the bottom end.

[0013] Compared with the prior art, the pH flow cell measuring control device has the advantages that:

[0014] The pH flow cell measuring control device has the advantages that: the high-precision sensor and the actuator are adopted, the complex control algorithm is adopted, the pH value control is more accurate, the temperature control, the pressure monitoring and the automatic electrode cleaning are adopted, the stability and the reliability of the system are improved, the PLC controller and the special software realize the automatic control and the data management of the system, the manual intervention is reduced, the display screen records and analyzes the pH value and other data, and process monitoring and optimization are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a first three-dimensional structure schematic view of the utility model;

[0016] Fig. 2 It is a second three-dimensional structure schematic view of the utility model;

[0017] Fig. 3 It is a structure schematic view of the detection assembly in the utility model.

[0018] Reference numerals in the drawing are:

[0019] 1, base; 2, flow cell; 3, motor; 4, PLC controller; 5, touch screen; 6, anti-skid pad; 7, first connecting pipe; 8, first peristaltic pump; 9, second connecting pipe; 10, electrode cleaner; 11, cleaning liquid storage bottle; 12, three-way valve; 13, third connecting pipe; 14, second peristaltic pump; 15, fourth connecting pipe; 16, acid-base storage bottle; 17, pH composite electrode; 18, reference electrode; 19, temperature sensor; 20, pressure sensor; 21, rotating rod; 22, paddle; 23, mounting sleeve; 24, valve; 25, gas introducer. DETAILED DESCRIPTION

[0020] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments in the following description are only as examples, and other obvious modifications can be conceived by those skilled in the art.

[0021] Referring to Figs. 1-3 As shown in the figure, a pH flow cell measurement control device, comprising: base 1, the outer surface top of base 1 is fixedly installed with flow cell 2, base 1 supports the whole device, ensures stability, and adopts corrosion-resistant material to prolong service life, the outer surface top of flow cell 2 is fixedly installed with motor 3, flow cell 2 is used to hold the liquid to be measured, and the flowability of the liquid is kept, motor 3 drives the rotation of rotating rod 21, and then drives paddle 22 to stir the liquid, to ensure the consistency of pH value and increase the measurement accuracy, the output end of motor 3 is installed with rotating rod 21 penetrating through the outer surface of flow cell 2, the shaft surface bottom of rotating rod 21 is installed with mounting sleeve 23, and the shaft surface middle of mounting sleeve 23 is installed with paddle 22.

[0022] Further, the inside rear end of flow cell 2 is provided with PH composite electrode 17, PH composite electrode 17 measures the pH value of the liquid in flow cell in real time, provides data support for the control system, the inside front end of flow cell 2 is installed with reference electrode 18, reference electrode 18 provides a stable reference potential to improve the accuracy of PH measurement, the inside right side of flow cell 2 is installed with pressure sensor 20, pressure sensor 20 monitors the liquid pressure in flow cell, ensures that the equipment operates within a safe range, and the inside left side of flow cell 2 is installed with temperature sensor 19, temperature sensor 19 monitors the liquid temperature in real time, so as to adjust the measurement parameters and ensure the measurement accuracy.

[0023] Further, the inside top of flow cell 2 is provided with gas introducer 25 at the rear end of rotating rod 21, the outer surface top of gas introducer 25 is installed with three-way valve 12 penetrating through the outer surface of flow cell 2, valve 24 is opened, gas is discharged from flow cell 2 through gas introducer 25, which helps to remove the gas dissolved in the liquid and ensures the measurement accuracy, the pH value of the liquid in flow cell 2 is measured through PH composite electrode 17, if the pH value is not within the target range, three-way valve 12 is connected with third connecting pipe 13 and starts second peristaltic pump 14, to add acid or alkali solution into flow cell 2 at a precisely controlled rate, the pH value is continuously monitored until the target range is reached, valve 24 is installed at the connection of three-way valve 12 and gas introducer 25, the left side output end of three-way valve 12 is installed with third connecting pipe 13, the outer surface bottom of third connecting pipe 13 is fixedly installed with second peristaltic pump 14, the output end of second peristaltic pump 14 is installed with fourth connecting pipe 15, the shaft surface bottom of fourth connecting pipe 15 is installed with acid-alkali liquid storage bottle 16,

[0024] Further, the outer surface right side of the three-way valve 12 is provided with the first connecting pipe 7, the axial surface bottom end of the first connecting pipe 7 is provided with the first peristaltic pump 8, then the first peristaltic pump 8 is in the closed state, by the touch screen 5, the electrode cleaning program is selected on the PLC controller 4, the PLC controller 4 controls the three-way valve 12, switches to the mode that the first connecting pipe 7 is connected to the cleaning liquid storage bottle 11, the PLC controller 4 starts the first peristaltic pump 8, the first peristaltic pump 8 conveys the cleaning liquid from the cleaning liquid storage bottle 11 to the electrode cleaner 10, the output end of the first peristaltic pump 8 is provided with the second connecting pipe 9, the axial surface bottom end of the second connecting pipe 9 is provided with the cleaning liquid storage bottle 11, the axial surface of the second connecting pipe 9, close to the cleaning liquid storage bottle 11 side is provided with the electrode cleaner 10, the outer surface front end of the base 1 is provided with the PLC controller 4, the outer surface of the PLC controller 4 is provided with the touch screen 5, and the outer surface bottom end of the base 1 is provided with the anti-skid pad 6.

[0025] Working principle and implementation: start the motor 3 to make the paddle 22 stir the liquid, open the valve 24 to discharge the dissolved gas in the flow tank, close the valve 4 after a period of time, the PLC controller 4 reads the reading of the pH composite electrode 17 and displays on the touch screen 5, while monitoring the data of the temperature sensor 19 and the pressure sensor 20, if the pH value is not in the target range, the PLC automatically controls the second peristaltic pump 14 to add acid or alkali solution until the pH reaches the target.

[0026] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A pH flow cell measurement control device, comprising: The base (1) is characterized in that: the outer surface top end of the base (1) is fixedly installed with a flow cell (2), the outer surface top end of the flow cell (2) is fixedly installed with a motor (3), the output end of the motor (3) is installed with a rotating rod (21) penetrating through the outer surface of the flow cell (2), the shaft surface bottom end of the rotating rod (21) is installed with a mounting sleeve (23), the shaft surface middle end of the mounting sleeve (23) is installed with a paddle (22), and the inner top end of the flow cell (2) is provided with a gas introducer (25) at the rear end of the rotating rod (21).

2. The pH flow cell measurement control device of claim 1, wherein: The inner rear end of the flow cell (2) is provided with a PH composite electrode (17), the inner front end of the flow cell (2) is installed with a reference electrode (18), the inner right side of the flow cell (2) is installed with a pressure sensor (20), and the inner left side of the flow cell (2) is installed with a temperature sensor (19).

3. The pH flow cell measurement control device of claim 1, wherein: The outer surface top end of the gas introducer (25) is installed with a three-way valve (12) penetrating through the outer surface of the flow cell (2), a valve (24) is installed at the connection between the three-way valve (12) and the gas introducer (25).

4. The pH flow cell measurement control device of claim 3, wherein: The left side output end of the three-way valve (12) is installed with a third connecting pipe (13), the outer surface bottom end of the third connecting pipe (13) is fixedly installed with a second peristaltic pump (14), and the output end of the second peristaltic pump (14) is installed with a fourth connecting pipe (15).

5. A pH flow cell measurement control device according to claim 4, wherein: The shaft surface bottom end of the fourth connecting pipe (15) is installed with an acid-base liquid storage bottle (16), the outer surface right side of the three-way valve (12) is installed with a first connecting pipe (7), and the shaft surface bottom end of the first connecting pipe (7) is installed with a first peristaltic pump (8).

6. A pH flow cell measurement control device according to claim 5, wherein: The output end of the first peristaltic pump (8) is installed with a second connecting pipe (9), the shaft surface bottom end of the second connecting pipe (9) is installed with a cleaning liquid storage bottle (11), and the shaft surface of the second connecting pipe (9) is installed with an electrode cleaner (10) close to the cleaning liquid storage bottle (11).

7. The pH flow cell measurement control device of claim 1, wherein: The outer surface front end of the base (1) is provided with a PLC controller (4), the outer surface of the PLC controller (4) is provided with a touch screen (5), and the outer surface bottom end of the base (1) is provided with an anti-skid pad (6).

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