Device for automatically measuring content of free calcium oxide in powder

Abstract

The invention relates to the technical field of building material detection, in particular to a device for automatically measuring the content of free calcium oxide in powder. The conical flask is used for containing a sample to be measured; the infusion part is communicated with the conical flask and is used for introducing a solution required for measuring the content of the free calcium oxide in the sample into the conical flask; the stirring part is used for stirring the solution in the conical flask; the heating part is positioned at the bottom of the conical flask and is used for heating the solution in the conical flask; the control part is electrically connected with the infusion part, the stirring part and the heating part and is used for controlling the infusion part, the stirring part and the heating part to operate and automatically calculating the content of free calcium oxide in the sample according to the consumed volume of the titration solution and the mass of the sample. The device is simple in structure and easy to realize, can provide a more accurate measurement result, and improves the accuracy of the measurement result of the content of the free calcium oxide in the powder.

Description

Technical Field

[0001] The invention relates to the technical field of building material detection, in particular to a device for automatically measuring the free calcium oxide content of powder. Background Art

[0002] The free calcium oxide content of powder is an important material chemical parameter, which reflects the expansion characteristics of powder as a raw material for concrete. This parameter is related to factors such as the type of raw materials used in the production of powder, components, temperature during production, degree of reaction, etc.

[0003] The free calcium oxide content of powder measured in the prior art is measured by a free calcium oxide measuring instrument, and its measuring principle is: free calcium oxide and ethylene glycol are reacted in anhydrous ethanol solution, and when the temperature reaches the boiling point of the mixed liquid, ethylene glycol calcium is generated, so that the phenolphthalein indicator is red, and then the benzoic acid anhydrous ethanol standard solution is titrated until the red disappears. According to the volume of the benzoic acid anhydrous ethanol standard solution consumed during the titration of ethylene glycol calcium and the titer of calcium oxide, the percentage of free calcium oxide in the sample is obtained. However, the free calcium oxide measuring instrument is extremely inconvenient and time-consuming when measuring, and it is difficult to accurately judge that the red disappears during the measurement process, so that there is a large error in the test process. Therefore, it is urgent to solve.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention, and do not constitute an admission that the above contents are the closest prior art. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a device for automatically measuring the free calcium oxide content in powder. The device has a simple structure, is easy to implement, and can provide more accurate measurement results, thereby improving the accuracy of the measurement results of the free calcium oxide content in the powder.

[0006] To achieve the above object, the technical solution of the present invention is implemented as follows: a device for automatically measuring the free calcium oxide content of powder, comprising:

[0007] Conical flask, used to hold the sample to be measured;

[0008] An infusion part, which is connected to the conical flask and introduces a solution required for determining the free calcium oxide content of the sample into the conical flask;

[0009] A stirring part, which is used to stir the solution in the conical flask;

[0010] A heating part, which is located at the bottom of the conical flask and heats the solution in the conical flask;

[0011] The control unit is electrically connected to the infusion unit, the stirring unit and the heating unit, and is used to control the operation of the infusion unit, the stirring unit and the heating unit, and automatically calculate the content of free calcium oxide in the sample based on the volume consumed by the titration solution and the mass of the sample.

[0012] Preferably, the infusion part includes a first solution storage tank, a second solution storage tank and a peristaltic pump; the first solution storage tank is filled with a solution for chemically reacting with the sample in the conical flask, and the solution in the first solution storage tank and the sample form a solution to be titrated; the second solution storage tank is filled with a titration solution for chemically reacting with the solution to be titrated; the peristaltic pump is connected to the first solution storage tank, the second solution storage tank and the conical flask through four connecting conduits, respectively, and transports the solutions in the first solution storage tank and the second solution storage tank to the conical flask in sequence.

[0013] Preferably, the heating part comprises a heating platform and an electronic temperature controller; the conical flask is placed on the heating platform; and the electronic temperature controller is inserted into the conical flask.

[0014] Preferably, the stirring part includes a motor rotating magnetic field and a magnetic stirrer; the magnetic stirrer is arranged in a conical flask; the motor rotating magnetic field is arranged at the bottom of the heating platform, and the magnetic field generated by the motor rotating magnetic field after power is turned on drives the magnetic stirrer in the conical flask to rotate automatically, and the speed of the magnetic stirrer is adjustable.

[0015] Preferably, the control unit includes a touch panel, an electrical cabinet and two PH electrodes; the electrical cabinet is electrically connected to the heating platform and the motor rotating magnetic field, and is used to provide power and an adjustment device for the heating platform and the motor rotating magnetic field, and to achieve temperature and speed adjustment; the two PH electrodes are inserted in a conical flask, and the titration end point is determined based on the sudden jump of the electrode potential of the solution in the conical flask; the touch panel is electrically connected to the two PH electrodes, the electrical cabinet, the electronic temperature meter, the heating platform and the motor rotating magnetic field.

[0016] Preferably, it also includes a bottle stopper, a fixing frame, a circulation pipe and a circulation pump; the bottle stopper covers the bottle mouth of the conical flask, and is provided with 6 plug holes, which respectively form a plug-in fit with the electronic temperature device, the circulation pipe, two connecting pipes of the peristaltic pump and two PH electrodes; the fixing frame is installed on the electrical cabinet and is used to fix the circulation pipe; the circulation pump is connected with the condenser and is used to drive the low-temperature liquid to circulate along the circulation pipe, and the circulation pipe is used to condense the vaporized solution after heating in the conical flask.

[0017] Preferably, an electronic liquid level sensor is also included; the electronic liquid level sensor is arranged on the circulation pipe in the conical flask and is electrically connected to the touch panel, and is used to sense the starting node when the condensed liquid on the circulation pipe drips continuously.

[0018] Preferably, the volume of the titration solution delivered by the peristaltic pump in a single time is adjustable, and the volume of the titration liquid delivered by the peristaltic pump can be accurately measured.

[0019] The beneficial effects of the present invention are embodied in:

[0020] The device provided by the present invention can automatically dissolve and stir the sample to form a solution to be titrated, and automatically titrate the solution to be titrated, and determine the titration end point according to the sudden jump of the electrode potential of the solution, and automatically calculate the free calcium oxide content. This can not only realize the rapid determination of the free calcium oxide content of the powder, greatly improve the accuracy of the results and reduce the detection cost, but also solve the problem of large errors in the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention.

[0022] Description of reference numerals:

[0023] 10. Touch panel; 20. Electrical cabinet; 30. Heating platform; 40. Conical flask; 41. Bottle stopper;

[0024] 50. Fixed frame; 60. Circulation pipe; 61. Circulation pump; 70. First solution storage tank; 80. Second solution storage tank; 90. Peristaltic pump. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Example

[0027] See also Figure 1 As shown:

[0028] The present invention provides a device for automatically measuring the free calcium oxide content of powder, comprising:

[0029] The conical flask 40 and the bottle stopper 41, the conical flask 40 is used to contain the sample to be measured. The bottle stopper 41 covers the bottle mouth of the conical flask 40, and the bottle stopper 41 is provided with 6 plug holes.

[0030] The infusion part is used to introduce the titration solution into the conical flask 40. The infusion part includes a first solution storage tank 70, a second solution storage tank 80 and a peristaltic pump 90; the first solution storage tank 70 is filled with a solution for dissolving the sample in the conical flask 40, and the solution in the first solution storage tank 70 forms a solution to be titrated with the sample; the second solution storage tank 80 is filled with a titration solution for forming a chemical reaction with the solution to be titrated. The peristaltic pump 90 is connected to the first solution storage tank 70, the second solution storage tank 80 and the conical flask 40 respectively through four connecting conduits, and sequentially transports the solutions in the first solution storage tank 70 and the second solution storage tank 80 to the conical flask 40.

[0031] During specific use, the peristaltic pump 90 uses a high-precision pump body, the volume of the titration solution delivered in a single time is adjustable, and the volume of the titration liquid delivered can be accurately measured.

[0032] The heating part is used to heat the solution in the conical flask 40 ; the heating part includes a heating platform 30 and an electronic temperature controller; the conical flask 40 is placed on the heating platform 30 ; and the electronic temperature controller is inserted in the conical flask 40 .

[0033] The stirring part is used to stir the solution in the conical flask 40; the stirring part includes a motor rotating magnetic field and a magnetic stirrer; the magnetic stirrer is arranged in the conical flask 40; the motor rotating magnetic field is arranged at the bottom of the heating platform 30, and the magnetic field generated by the motor rotating magnetic field after power is turned on drives the magnetic stirrer in the conical flask 40 to rotate automatically.

[0034] The control unit is electrically connected to the infusion unit, the stirring unit and the heating unit, and is used to control the operation of the infusion unit, the stirring unit and the heating unit, and automatically calculate the content of free calcium oxide in the sample based on the volume consumed by the titration solution and the mass of the sample.

[0035] The control unit includes a touch panel 10, an electrical cabinet 20 and two PH electrodes. The electrical cabinet 20 is electrically connected to the heating platform 30 and the motor rotating magnetic field, and is used to provide power for the heating platform 30 and the motor rotating magnetic field to work. The two PH electrodes are inserted into the conical flask 40, and the titration end point is determined based on the sudden jump of the electrode potential of the solution in the conical flask 40. The touch panel 10 is electrically connected to the two PH electrodes, the electrical cabinet 20, the electronic temperature device, the heating platform 30 and the motor rotating magnetic field, and is used to receive data information when the two PH electrodes, the electrical cabinet 20, the electronic temperature device, the heating platform 30 and the motor rotating magnetic field are in operation.

[0036] It also includes a fixing frame 50, a circulation pipe 60 and a circulation pump 61. The bottle stopper 41 covers the bottle mouth of the conical flask 40, and the six plug holes on the bottle stopper 41 respectively form a plug-in match with the electronic temperature device, the circulation pipe 60, the two connecting pipes of the peristaltic pump 90 and the two PH electrodes. The fixing frame 50 is installed on the electrical cabinet 20 and is used to fix the circulation pipe 60; the circulation pump 61 is connected to the circulation pipe 60 and is used to drive the low-temperature liquid to circulate along the circulation pipe 60, so that the circulation pipe 60 can condense the solution vaporized after heating in the conical flask 40.

[0037] It also includes an electronic liquid level sensor; the electronic liquid level sensor is arranged on the circulation pipe 60 in the conical flask 40 and is electrically connected to the touch panel 10, and is used to sense the starting node when the condensed liquid on the circulation pipe 60 drips continuously.

[0038] In the specific implementation process, when the device is used to measure the free calcium oxide in powder:

[0039] First, the sample, i.e., the powder, is weighed to an accuracy of 0.0001 g. The weighed powdered sample is placed in a conical flask 40, and then a magnetic rotor is installed in the conical flask 40. The conical flask 40 is then placed on the magnetic stirring platform of the free calcium oxide instrument, the height of the fixing frame 50 is adjusted, the bottle stopper 41 is dropped, and two pH electrodes, a temperature sensor, a connecting conduit connected to a peristaltic pump 90, and a circulation tube 60 are inserted.

[0040] Adjust the height of the two pH electrodes on the bottle stopper 41 so that they can be inserted into the liquid without contacting the rotor. After the touch panel 10 controls the high-precision peristaltic pump 90 to accurately measure 30 ml of the solution in the first solution storage tank 70 and pump it into the conical flask 40, the stirring part and the heating part start to operate at the same time, and the magnetic rotor in the conical flask 40 rotates with the rotation of the motor's rotating magnetic field to stir the liquid and powder therein. At the same time, the circulation pipe 60 and the circulation pump 61 also start to cool the steam. When the tube liquid level sensor at the circulation pipe 60 on the bottle stopper 41 senses that the cooling liquid is dripping continuously, continue to heat and boil slightly under stirring for five minutes, then stop heating, and the sample is completely dissolved in the solution to form a solution to be titrated.

[0041] After the heating stops, a high-precision peristaltic pump 90 is immediately used to slowly drip the standard titration solution in the second solution storage tank 80 into the conical flask 40. As the magnetic rotor continues to stir, the two solutions in the conical flask 40 undergo a chemical reaction, and as the standard titration solution is slowly added, the pH of the mixed solution in the conical flask 40 changes.

[0042] Since the concentration of the measured ions suddenly changes near the titration endpoint, causing a sudden jump in the electrode potential, the two pH electrodes can determine the titration endpoint based on the sudden jump in the electrode potential. When the touch panel 10 collects the endpoint data through the two pH electrodes, the infusion part, the stirring part and the heating part all stop running. The touch panel 10 automatically processes the results and displays the free calcium oxide content results.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for automatically measuring the free calcium oxide content of powder, characterized in that: include: A conical flask (40) for containing a sample to be measured; An infusion section, which is connected to the conical flask (40) and introduces a solution required for determining the free calcium oxide content of the sample into the conical flask (40); A stirring part, which is used to stir the solution in the conical flask (40); A heating part, which is located at the bottom of the conical flask (40) and heats the solution in the conical flask (40); The control unit is electrically connected to the infusion unit, the stirring unit and the heating unit, and is used to control the operation of the infusion unit, the stirring unit and the heating unit, and automatically calculate the content of free calcium oxide in the sample based on the volume consumed by the titration solution and the mass of the sample.

2. The device for automatically measuring the free calcium oxide content of powder according to claim 1, characterized in that: The infusion section comprises a first solution storage tank (70), a second solution storage tank (80) and a peristaltic pump (90); the first solution storage tank (70) contains a solution for chemically reacting with a sample in a conical flask (40), and the solution in the first solution storage tank (70) and the sample form a solution to be titrated; The second solution storage tank (80) contains a titration solution for forming a chemical reaction with the solution to be titrated; the peristaltic pump (90) is connected to the first solution storage tank (70), the second solution storage tank (80) and the conical flask (40) respectively through four connecting conduits, and sequentially transports the solutions in the first solution storage tank (70) and the second solution storage tank (80) to the conical flask (40).

3. The device for automatically measuring the free calcium oxide content of powder according to claim 2, characterized in that: The heating part comprises a heating platform (30) and an electronic temperature controller; the conical flask (40) is placed on the heating platform (30); and the electronic temperature controller is inserted into the conical flask (40).

4. The device for automatically measuring the free calcium oxide content of powder according to claim 3, characterized in that: The stirring part comprises a motor rotating magnetic field and a magnetic stirrer; the magnetic stirrer is arranged in a conical flask (40); the motor rotating magnetic field is arranged at the bottom of the heating platform (30), and the magnetic field generated by the motor rotating magnetic field after power is turned on drives the magnetic stirrer in the conical flask (40) to rotate automatically.

5. The device for automatically measuring the free calcium oxide content of powder according to claim 4, characterized in that: The control unit comprises a touch panel (10), an electrical cabinet (20) and two pH electrodes; the electrical cabinet (20) is electrically connected to the heating platform (30) and the motor rotating magnetic field, and is used to provide power for the heating platform (30) and the motor rotating magnetic field to operate; the two pH electrodes are inserted into a conical flask (40), and the titration end point is determined based on a sudden jump in the electrode potential of the solution in the conical flask (40); the touch panel (10) is electrically connected to the two pH electrodes, the electrical cabinet (20), the electronic temperature meter, the heating platform (30) and the motor rotating magnetic field.

6. The device for automatically measuring the free calcium oxide content of powder according to claim 5, characterized in that: The invention also comprises a bottle stopper (41), a fixing frame (50), a circulation pipe (60) and a circulation pump (61); the bottle stopper (41) covers the bottle mouth of the conical flask (40), and the bottle stopper (41) is provided with 6 plug holes, and the 6 plug holes are respectively plugged with the electronic temperature device, the circulation pipe (60), two connecting pipes of the peristaltic pump (90) and two pH electrodes; the fixing frame (50) is installed on the electrical cabinet (20) and is used to fix the circulation pipe (60); the circulation pump (61) is connected with the circulation pipe (60) and is used to drive the low-temperature liquid to circulate along the inside of the circulation pipe (60); the circulation pipe (60) is used to condense the heated and vaporized solution in the conical flask (40).

7. The device for automatically measuring the free calcium oxide content of powder according to claim 6, characterized in that: It also includes an electronic liquid level sensor; the electronic liquid level sensor is arranged on the circulation tube (60) in the conical flask (40) and is electrically connected to the touch panel (10) to sense the starting node when the condensed liquid on the circulation tube (60) drips continuously.

8. The device for automatically measuring the free calcium oxide content of powder according to claim 6, characterized in that: The volume of the titration liquid delivered by the peristaltic pump (90) can be accurately measured.

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