PH measuring system with automatic calibration function

Abstract

The utility model relates to the technical field of PH measurement, in particular to an automatic calibration PH measurement system, which comprises a flow cell and a standard liquid bottle, a PH electrode is arranged in the flow cell, a sample inlet of the flow cell is connected with a first connecting pipe, one end of the first connecting pipe far away from the flow cell is connected with a second connecting pipe, and the other end of the first connecting pipe far away from the standard liquid bottle is connected with a water pump. The first connecting pipe is communicated with a sample injection pipe, the standard liquid bottles comprise a first standard liquid bottle and a second standard liquid bottle, the first standard liquid bottle and the second standard liquid bottle are both communicated with the second connecting pipe, the second standard liquid bottle is arranged close to one side of the flow cell, and three-way valves are arranged at the joints of the first standard liquid bottle and the second connecting pipe and the joints of the second standard liquid bottle and the second connecting pipe. According to the utility model, PH detection, calibration and cleaning of a sample in the flow cell can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of PH measurement, and specifically relates to an automatic calibrated PH measurement system. Background Art

[0002] The hydrogen ion concentration index is a method of expressing hydrogen ion concentration. It is the negative value of the common logarithm of the hydrogen ion concentration in aqueous solution. Many power generation and production companies need to continuously and accurately measure and control the pH value of their systems in order to accurately grasp the production process. However, pH electrodes are prone to drift over time, resulting in inaccurate pH measurements. There are many uncontrollable factors in manual calibration. Accurate measurement of pH value is of great significance to production control. In an environment where stable, continuous and accurate pH measurement is required, the drift of pH electrodes and the inability of manual calibration to keep up will lead to inaccurate measurement data. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide an automatically calibrated pH measurement system.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatically calibrated pH measurement system, comprising a circulation pool and a standard liquid bottle, a pH electrode is arranged in the circulation pool, a sampling port of the circulation pool is connected to a first connecting tube, an end of the first connecting tube away from the circulation pool is connected to a second connecting tube, an injection tube is connected to the first connecting tube, the standard liquid bottle comprises a first standard liquid bottle and a second standard liquid bottle, the first standard liquid bottle and the second standard liquid bottle are both connected to the second connecting tube, and the second standard liquid bottle is arranged close to one side of the circulation pool, and three-way valves are arranged at the connection between the first standard liquid bottle and the second standard liquid bottle and the second connecting tube.

[0005] In some of the embodiments, the sample outlet of the circulation pool is provided with a drain trough.

[0006] In some embodiments, a manual regulating valve and a solenoid valve are sequentially connected between the sample injection tube and the first connecting tube.

[0007] In some of the embodiments, a flow meter is provided between the sample inlet tube and the first connecting tube.

[0008] In some embodiments, a flow limiter is provided on the second connecting tube between the first connecting tube and the second standard solution bottle.

[0009] In some embodiments, a manual sampling bottle is provided at one end of the second connecting tube away from the first connecting tube, and a shut-off valve is provided between the manual sampling bottle and the second connecting tube.

[0010] In some of the embodiments, the circulation cell is a stainless steel circulation cell, and the pH electrode is an all-glass ultrapure water electrode.

[0011] In some embodiments, the first standard solution bottle contains a first standard solution, and the second standard solution bottle contains a second standard solution.

[0012] In some embodiments, the volume of the standard solution in the first standard solution bottle is twice that of the circulation cell, and the volume of the standard solution in the second standard solution bottle is 1.5 times that of the circulation cell.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the sample can be conveniently flowed into the circulation pool through the sample injection tube, the sample in the circulation pool can be tested for pH through the pH electrode, during calibration, the second three-way valve and the first three-way valve are opened successively according to the set program, and the standard liquids in the first standard liquid bottle and the second standard liquid bottle flow into the circulation pool successively under the maximum force of gravity for calibration and cleaning, and the slope is automatically compared after calibration, the normal range of the slope is 85%-110% by default, and the second automatic calibration is performed when the range is exceeded, and an alarm can also be directly output;

[0014] The drain trough can be used to discharge the measured sample, the manual regulating valve can be used to adjust the flow of the sample into the circulation pool, the solenoid valve can be used to close the injection tube during calibration, the flow meter can be used to measure the flow of the standard solution, and the flow restrictor can be used to limit the flow of the standard solution.

[0015] Details of one or more embodiments of the present application are presented in the following drawings and descriptions to make other features, purposes and advantages of the present application more concise and easy to understand. The present application is fully described and understood through the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the connection structure of the utility model.

[0017] In the figure: 1. circulation pool; 2. injection tube; 3. pH electrode; 4. drain tank; 5. manual regulating valve; 6. second standard solution bottle; 7. first standard solution bottle; 8. manual sampling bottle; 9. first three-way valve; 10. second three-way valve; 11. shut-off valve; 12. flow limiter; 13. flow meter; 14. solenoid valve; 15. first connecting pipe; 16. second connecting pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1 The utility model provides a technical solution: an automatically calibrated pH measurement system, comprising a circulation pool and a standard liquid bottle, wherein a pH electrode is arranged in the circulation pool, a sampling port of the circulation pool is connected to a first connecting tube, an end of the first connecting tube away from the circulation pool is connected to a second connecting tube, an injection tube is connected to the first connecting tube, the standard liquid bottle comprises a first standard liquid bottle and a second standard liquid bottle, the first standard liquid bottle and the second standard liquid bottle are both connected to the second connecting tube, and the second standard liquid bottle is arranged close to one side of the circulation pool, three-way valves are arranged at the connection between the first standard liquid bottle and the second standard liquid bottle and the second connecting tube, the first standard liquid bottle is provided with the second three-way valve, and the second standard liquid bottle is provided with the first three-way valve.

[0020] The sample outlet of the circulation pool is provided with a sewage drain.

[0021] A manual regulating valve and a solenoid valve are sequentially connected between the sample injection tube and the first connecting tube.

[0022] A flow meter is arranged between the sample injection tube and the first connecting tube.

[0023] A flow limiter is arranged on the second connecting tube between the first connecting tube and the second standard solution bottle.

[0024] A manual sampling bottle is arranged at one end of the second connecting tube away from the first connecting tube, and a shut-off valve is arranged between the manual sampling bottle and the second connecting tube. By placing a sample in the manual sampling bottle, slope comparison can be performed after calibration.

[0025] The circulation pool is a stainless steel circulation pool, and the pH electrode is an all-glass ultrapure water electrode.

[0026] The first standard solution bottle contains a first standard solution, and the second standard solution bottle contains a second standard solution.

[0027] The volume of the standard solution in the first standard solution bottle is twice that of the circulation pool, and the volume of the standard solution in the second standard solution bottle is 1.5 times that of the circulation pool; an alarm will be triggered if the remaining standard solution volume in the second standard solution bottle and the first standard solution bottle is less than 10%.

[0028] The drain trough can be used to discharge the measured sample, the manual regulating valve can be used to adjust the flow of the sample into the circulation pool, the solenoid valve can be used to close the injection tube during calibration, the flow meter can be used to measure the flow of the standard solution, and the flow restrictor can be used to limit the flow of the standard solution.

[0029] Through the technical scheme, the pH electrode, three-way valve, solenoid valve, flow meter, flow restrictor, shut-off valve are connected to the controller or computer; when in use, the manual regulating valve and the solenoid valve are opened, the second three-way valve and the first three-way valve are closed, the sample can be conveniently flowed into the circulation pool through the injection tube, and the pH test of the sample in the circulation pool can be performed through the pH electrode. During calibration, the solenoid valve is closed, the second three-way valve and the first three-way valve are opened successively according to the set program, and the first standard liquid and the second standard liquid in the first standard liquid bottle and the second standard liquid bottle flow into the circulation pool successively under the action of gravity for calibration and cleaning. After calibration, the slope is automatically compared, and the normal range of the slope defaults to 85%-110%. If it exceeds the range, it will enter the second automatic calibration, and the alarm can also be directly output. The drain tank can be used to discharge the measured sample, the manual regulating valve can be used to adjust the flow rate of the sample flowing into the circulation pool, the injection tube can be closed by the solenoid valve during calibration, the flow meter can be used to measure the flow rate of the standard liquid, and the flow restrictor can be used to limit the flow rate of the standard liquid;

[0030] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic calibration pH measurement system, characterized in that: It includes a circulation pool and a standard liquid bottle, wherein a pH electrode is arranged in the circulation pool, a sampling port of the circulation pool is connected to a first connecting tube, an end of the first connecting tube away from the circulation pool is connected to a second connecting tube, an injection tube is connected to the first connecting tube, the standard liquid bottle includes a first standard liquid bottle and a second standard liquid bottle, the first standard liquid bottle and the second standard liquid bottle are both connected to the second connecting tube, and the second standard liquid bottle is arranged close to one side of the circulation pool, and three-way valves are arranged at the connection between the first standard liquid bottle and the second standard liquid bottle and the second connecting tube.

2. An automatic calibration pH measurement system according to claim 1, characterized in that: The sample outlet of the circulation pool is provided with a sewage drain.

3. The automatic calibration pH measurement system according to claim 1, characterized in that: A manual regulating valve and a solenoid valve are sequentially connected between the sample injection tube and the first connecting tube.

4. An automatic calibration pH measurement system according to claim 1 or 3, characterized in that: A flow meter is arranged between the sample injection tube and the first connecting tube.

5. The automatic calibration pH measurement system according to claim 1, characterized in that: A flow limiter is arranged on the second connecting tube between the first connecting tube and the second standard solution bottle.

6. The automatic calibration pH measurement system according to claim 1, characterized in that: A manual sampling bottle is arranged at one end of the second connecting tube away from the first connecting tube, and a shut-off valve is arranged between the manual sampling bottle and the second connecting tube.

7. An automatic calibration pH measurement system according to claim 1, characterized in that: The circulation pool is a stainless steel circulation pool, and the pH electrode is an all-glass ultrapure water electrode.

8. An automatic calibration pH measurement system according to claim 1, characterized in that: The first standard solution bottle contains a first standard solution, and the second standard solution bottle contains a second standard solution.

9. An automatic calibration pH measurement system according to claim 8, characterized in that: The volume of the standard solution in the first standard solution bottle is twice that of the circulation pool, and the volume of the standard solution in the second standard solution bottle is 1.5 times that of the circulation pool.

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