A system and method for detecting calcium oxide content in inorganic binders

Abstract

The embodiments of the present application relate to a detection system and method for the content of calcium oxide in an inorganic binder. The detection system includes a detection box, a feeding cover provided on the detection box for closing a feeding port on the detection box, an exhaust valve provided on the top surface of the detection box, an injection unit for injecting a solution into the detection box, a liquid level detection unit provided in the exhaust valve, a reagent unit provided on the detection box for injecting a detection reagent into the detection box, and a diaphragm pump connected to the detection box at both the input and output ends. The liquid level detection unit is used to provide feedback to the injection unit so that the detection box is filled with mixed liquid during the detection process. The detection system and method for the content of calcium oxide in an inorganic binder disclosed in the embodiments of the present application can quickly calibrate the content of calcium oxide in an inorganic binder on site.

Description

Technical Field

[0001] The present application relates to the technical field of quality control, and in particular to a system and method for detecting the content of calcium oxide in an inorganic binder. Background Art

[0002] The detection of calcium oxide content in inorganic binders is an important part of quality control. Most existing detection methods need to be carried out in laboratories and require relevant staff. The sampling and testing and waiting processes all take a certain amount of time. Summary of the invention

[0003] The embodiments of the present application provide a system and method for detecting the calcium oxide content in an inorganic binder, which can quickly calibrate the calcium oxide content in the inorganic binder on site.

[0004] The above-mentioned purpose of the embodiment of the present application is achieved through the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides a system for detecting calcium oxide content in an inorganic binder, comprising:

[0006] Testing box;

[0007] A feeding cover is provided on the detection box and is used to close the feeding opening on the detection box;

[0008] An exhaust valve is provided on the top surface of the test box;

[0009] An injection unit, used for injecting a solution into the test box;

[0010] The liquid level detection unit is arranged in the exhaust valve and is used to provide feedback to the injection unit so that the detection box is filled with mixed liquid during the detection process;

[0011] A reagent unit, provided on the detection box, for injecting detection reagent into the detection box; and

[0012] The diaphragm pump has its input and output ends connected to the detection box.

[0013] In a possible implementation manner of the second aspect, in a direction close to the center of the top surface of the detection box, the distance between the top surface of the detection box and the bottom surface of the detection box tends to increase;

[0014] The exhaust valve is located at the highest point of the top surface of the detection box.

[0015] In a possible implementation manner of the second aspect, the exhaust valve includes:

[0016] a valve body communicating with the space in the detection box; and

[0017] A one-way air-permeable membrane is arranged in the valve body, dividing the space in the valve body into a first space and a second space;

[0018] The first space is connected to the space in the detection box;

[0019] The second space is in communication with the external atmosphere.

[0020] In a possible implementation manner of the second aspect, the liquid level detection unit includes:

[0021] A pressure sensor is arranged on the valve body, and a detection end of the pressure sensor extends into the first space;

[0022] a liquid sensor, disposed on the valve body, wherein a detection end of the liquid sensor extends into the second space; and

[0023] A controller is used to communicate data with the injection unit based on feedback from the pressure sensor and the liquid sensor.

[0024] In a possible implementation manner of the second aspect, a detection end of the pressure sensor abuts against the one-way air-permeable membrane.

[0025] In a possible implementation manner of the second aspect, the reagent unit includes:

[0026] A rotating shaft is rotatably connected to the detection box, and a first end of the rotating shaft is located in the detection box;

[0027] A driving motor is disposed on the detection box and connected to the second end of the rotating shaft;

[0028] A detection disk is disposed on the first end of the rotating shaft;

[0029] Multiple reagent compartments are evenly distributed on the test tray;

[0030] A sealing membrane for closing the open end of the reagent compartment; and

[0031] A control unit, the output end of which is connected to the drive motor and is used to adjust the speed of the drive motor;

[0032] Among them, the strength of the sealing film is different.

[0033] In a second aspect, the present application provides a method for detecting the content of calcium oxide in an inorganic binder, comprising:

[0034] Add a certain amount of sample into the test box;

[0035] Inject sufficient solution into the test box until the gas in the test box is completely discharged;

[0036] driving the solution in the detection chamber to flow until the sample melts; and

[0037] Add multiple test reagents into the test box in sequence until the color of the mixture in the test box no longer changes;

[0038] The mixture in the detection box is always in a flowing state. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of a system for detecting calcium oxide content in an inorganic binder provided in an embodiment of the present application.

[0040] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A.

[0041] Figure 3 This is a schematic diagram of the distribution of reagent chambers on a test plate provided in an embodiment of the present application.

[0042] Figure 4 It is a schematic diagram of the connection between a reagent chamber and a sealing film provided in an embodiment of the present application.

[0043] In the figure, 11, detection box, 12, feeding cover, 13, exhaust valve, 14, injection unit, 15, liquid level detection unit, 16, reagent unit, 17, diaphragm pump, 131, valve body, 132, one-way air permeable membrane, 133, first space, 134, second space, 151, pressure sensor, 152, liquid sensor, 161, rotating shaft, 162, driving motor, 163, detection disk, 164, reagent compartment, 165, sealing membrane, 166, control unit, 6, controller. DETAILED DESCRIPTION

[0044] The technical solution in this application is further described in detail below in conjunction with the accompanying drawings.

[0045] See also Figure 1 , which is a system for detecting the content of calcium oxide in an inorganic binder disclosed in an embodiment of the present application. The detection system consists of a detection box 11, a feeding cover 12, an exhaust valve 13, an injection unit 14, a liquid level detection unit 15, a reagent unit 16 and a diaphragm pump 17. The function of the detection box 11 is to provide a closed environment so that the sample (inorganic binder) can be dissolved in the solution in the detection box 11 and titrated.

[0046] The feeding cover 12 is arranged on the detection box 11, and its function is to close the feeding port on the detection box 11. That is, when adding the sample (inorganic binder) into the detection box 11, it is necessary to first remove the feeding cover 12 to expose the feeding port on the detection box 11, and then pour the sample (inorganic binder) into the detection box 11 through the feeding port, and finally reinstall the feeding cover 12 on the detection box 11.

[0047] In some possible embodiments, the connection between the feeding cover 12 and the detection box 11 is a threaded connection.

[0048] In some possible embodiments, the feeding cover 12 is located on the side wall of the detection box 11 instead of the top surface, so as to avoid air remaining in the feeding cover 12 .

[0049] The exhaust valve 13 is installed on the top surface of the detection box 11, and its function is to exhaust all the air in the detection box 11 when the injection unit 14 injects the solution into the detection box 11. It should be understood that the carbon dioxide in the air will cause the calcium hydroxide in the solution in the detection box 11 to be converted into calcium carbonate, resulting in the deviation of the subsequent titration results, so it is necessary to exhaust the air in the detection box 11 as much as possible during the detection process.

[0050] The liquid level detection unit 15 is arranged in the exhaust valve 13, and its function is to detect the liquid level height in the exhaust valve 13 and then feed back to the injection unit 14. The injection unit 14 works according to the feedback of the liquid level detection unit 15, so as to make the detection box 11 full of mixed liquid during the detection process and prevent the air outside the detection box 11 from entering the detection box 11.

[0051] The reagent unit 16 is provided on the detection box 11 and is used to inject the detection reagent into the detection box 11 so that the staff can determine whether the added amount of the detection reagent has reached the extreme value according to the color of the solution, and then calculate the calcium oxide content in the solution in the detection box 11 according to the added amount of the detection reagent.

[0052] The input and output ends of the diaphragm pump 17 are both connected to the detection box 11, and its function is to drive the solution in the detection box 11 to flow continuously, so that the sample (inorganic binder) and the solution can be mixed more fully, and the mixed liquid in the detection box 11 can be fully in contact with the detection reagent during the calibration process, so as to obtain more accurate detection results.

[0053] It should be understood that the diaphragm pump 17 drives the liquid to flow by means of an elastic membrane during operation, and this process can reduce the amount of carbon dioxide in the air dissolved in the water as much as possible. At the same time, the diaphragm pump 17 should be started at the same time as the injection unit 14 is started, and the solution injected into the detection box 11 by the injection unit 14 is sucked into the pump body, so that the air inside the pump body can be discharged.

[0054] It should also be understood that the detection method used in the embodiment of the present application is sucrose titration method, using phenolphthalein as an indicator. Therefore, the solution injected into the detection box 11 by the injection unit 14 is a mixture of distilled water, sucrose and phenolphthalein. This solution will be prepared in advance and can be directly taken when needed.

[0055] In some possible implementations, the injection unit 14 consists of two parts: a storage box and an injection pump. The storage box is used to store a solution prepared from distilled water, sucrose and phenolphthalein, and the injection pump is used to inject the solution in the storage box into the detection box 11.

[0056] The injection pump is preferably a diaphragm pump.

[0057] In conjunction with a specific process, the staff first removes the feeding cover 12 on the detection box 11, pours a rated amount of the sample (inorganic binder) into the detection box 11 and puts the feeding cover 12 back on the detection box 11, then starts the injection unit 14, and the injection unit 14 begins to inject a solution (made of distilled water, sucrose and phenolphthalein) into the detection box 11.

[0058] During the operation of the injection unit 14 , the diaphragm pump 17 is started at the same time to drive the solution in the detection box 11 to flow so that the solution can fully contact the sample (inorganic binder). After the liquid level detection unit 15 feeds back a signal to the injection unit 14 , the injection unit 14 stops working.

[0059] Then the reagent unit 16 starts to inject a portion of the detection reagent into the detection box 11, and then the staff performs calculations based on the color changes in the detection box 11. The principle of this process is as follows:

[0060] Phenolphthalein refers to an organic compound, which is colorless in acidic and neutral solutions and purple-red in alkaline solutions. Calcium oxide is dissolved in water to form calcium hydroxide. At this time, the mixed solution in the detection box 11 is alkaline. After adding the acidic detection reagent, the pH value of the mixed solution in the detection box 11 decreases. When the color of the mixed solution in the detection box 11 just changes to colorless and does not change after a specified time (for example, 30 seconds), it means that the mixed solution in the detection box 11 is a neutral solution (neither an acidic solution nor an alkaline solution). At this time, the amount of calcium hydroxide in the mixed solution in the detection box 11 can be calculated based on the amount of detection reagent added, and then the content of calcium oxide in the sample (inorganic binder) can be calculated.

[0061] See also Figure 1 As a specific embodiment of the calcium oxide content detection system in the inorganic binder provided in the application, in the direction close to the center of the top surface of the detection box 11, the distance between the top surface of the detection box 11 and the bottom surface of the detection box 11 tends to increase, and at the same time, the exhaust valve 13 is located at the highest point of the top surface of the detection box 11.

[0062] It should be understood that in the process of air being squeezed out of the detection box 11 by the solution, some air may remain at the edge of the top surface of the detection box 11. By changing the top surface shape of the detection box 11 to a cone or an arc, the air in the detection box 11 can be discharged as much as possible, which can make the detection result more accurate.

[0063] See also Figure 2 As a specific implementation of the calcium oxide content detection system in the inorganic binder provided in the application, the exhaust valve 13 is composed of a valve body 131 and a one-way air permeable membrane 132. The one-way air permeable membrane 132 is fixed in the valve body 131, dividing the space in the valve body 131 into two parts, namely a first space 133 and a second space 134.

[0064] The first space 133 is connected to the space in the detection box 11 , and the second space 134 is connected to the external atmosphere. The one-way air permeable membrane 132 can allow the gas in the detection box 11 to flow out and prevent the gas outside the detection box 11 from flowing in.

[0065] See also Figure 2 The liquid level detection unit 15 is composed of a pressure sensor 151, a liquid sensor 152 and a controller 6. Both sensors are installed on the valve body 131. The detection end of the pressure sensor 151 extends into the first space 133 to detect whether there is a solution in the first space 133. The detection end of the liquid sensor 152 extends into the second space 134 to detect whether there is a solution in the second space 134.

[0066] In some possible implementations, the controller 6 uses a programmable logic controller.

[0067] The detection results of the pressure sensor 151 and the liquid sensor 152 are sent to the controller 6, and the controller 6 communicates data with the injection unit 14 to control whether the injection unit 14 injects solution into the detection box 11. Specifically, when the liquid sensor 152 detects liquid, the injection unit 14 stops injecting solution into the detection box 11.

[0068] When the pressure detected by the detection end of the pressure sensor 151 reaches the set value, the injection unit 14 starts to inject the solution into the detection box 11. For example, if the liquid level in the valve body 131 drops, the one-way air permeable membrane 132 will be deformed because the external air cannot enter. When the deformation is large, it may even rupture.

[0069] When the one-way air permeable membrane 132 is deformed, a pressure is applied to the detection end of the pressure sensor 151. When the pressure reaches the set value, the injection unit 14 starts to inject solution into the detection box 11. At this time, the liquid level in the valve body 131 will rise, the one-way air permeable membrane 132 will recover, and the pressure on the detection end of the pressure sensor 151 will gradually disappear.

[0070] Furthermore, a detection end of the pressure sensor 151 abuts against the one-way air-permeable membrane 132 .

[0071] See also Figure 1 and Figure 3As a specific implementation of the calcium oxide content detection system in the inorganic binder provided in the application, the reagent unit 16 is composed of a rotating shaft 161, a driving motor 162, a detection disk 163, a reagent compartment 164, a sealing film 165 and a control unit 166. The rotating shaft 161 is rotatably connected to the detection box 11, and its two ends are respectively located inside and outside the detection box 11. For the convenience of description, the end of the rotating shaft 161 located inside the detection box 11 is called the first end, and the end of the rotating shaft 161 located outside the detection box 11 is called the second end.

[0072] The driving motor 162 is mounted on the detection box 11 and connected to the second end of the rotating shaft 161, and its function is to drive the rotating shaft 161 to rotate. The detection plate 163 is fixed on the first end of the rotating shaft 161, and can rotate with the rotation of the rotating shaft 161.

[0073] See also Figure 3 and Figure 4 A plurality of reagent chambers 164 are provided on the detection disk 163 . The reagent chambers 164 are used to store an acid solution. The open ends of the reagent chambers 164 are sealed with a sealing film 165 , and the strength of the sealing film 165 on each reagent chamber 164 is different.

[0074] Specifically, as the detection disk 163 rotates, the acidic solution in the reagent chamber 164 will apply pressure to the sealing film 165 on the reagent chamber 164. When the pressure reaches a limit value, the sealing film 165 will rupture. The applied pressure is positively correlated with the rotation speed of the detection disk 163. The higher the rotation speed of the detection disk 163, the greater the pressure on the sealing film 165.

[0075] By adjusting the rotation speed of the driving motor 162 , the required number of sealing films 165 can be ruptured. The rotation speed adjustment of the driving motor 162 is achieved by the control unit 166 . The output end of the control unit 166 is connected to the driving motor 162 for controlling the rotation speed of the driving motor 162 .

[0076] For example, the driving motor 162 can achieve multiple rotational speeds. At each rotational speed, a sealing film 165 will rupture. Therefore, by gradually increasing the rotational speed of the driving motor 162, quantitative addition of the acidic solution can be achieved.

[0077] In the final calibration process, the amount of acid solution added can be obtained by counting the number of damaged sealing films 165 .

[0078] In some possible implementations, the control unit 166 uses a frequency converter, and the drive motor 162 uses a three-phase asynchronous motor. When the frequency of the output current of the frequency converter changes, the rotation speed of the motor will also change.

[0079] In some other possible implementations, the control unit 166 uses a servo amplifier, and the drive motor 162 uses a servo motor. The servo amplifier can change the speed of the motor according to the received command. The signal can be sent to the servo amplifier using a combination of a programmable logic controller and a button. The number of buttons is multiple and connected to the programmable logic controller. When different buttons are pressed, the programmable logic controller sends different speed instructions to the control unit 166.

[0080] The present application also discloses a method for detecting the content of calcium oxide in an inorganic binder, the method comprising the following steps:

[0081] S101, adding a certain amount of sample into the detection box;

[0082] S102, injecting a sufficient amount of solution into the detection box until the gas in the detection box is completely discharged;

[0083] S103, driving the solution in the detection box to flow until the sample melts; and

[0084] S104, sequentially adding multiple test reagents into the test box until the color of the mixture in the test box no longer changes;

[0085] The mixture in the detection box is always in a flowing state.

[0086] The contents of each step have been introduced in the above content and will not be repeated here.

[0087] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A system for detecting calcium oxide content in an inorganic binder, characterized in that: include: Detection box (11); A feeding cover (12) is provided on the detection box (11) and is used to close the feeding opening on the detection box (11); An exhaust valve (13) is provided on the top surface of the detection box (11); An injection unit (14) for injecting a solution into the detection box (11); A liquid level detection unit (15) is disposed in the exhaust valve (13) and is used to provide feedback to the injection unit (14) so ​​that the detection box (11) is filled with mixed liquid during the detection process; A reagent unit (16), disposed on the detection box (11), and used for injecting a detection reagent into the detection box (11); as well as A diaphragm pump (17), the input end and the output end of which are both connected to the detection box (11); The reagent unit (16) comprises: A rotating shaft (161) is rotatably connected to the detection box (11), and a first end of the rotating shaft (161) is located inside the detection box (11); A driving motor (162) is disposed on the detection box (11) and connected to the second end of the rotating shaft (161); A detection disk (163) is disposed on a first end of the rotating shaft (161); A plurality of reagent chambers (164) are evenly distributed on the detection plate (163); A sealing membrane (165) for sealing the open end of the reagent chamber (164); and A control unit (166), the output end of which is connected to the drive motor (162) and is used to adjust the rotation speed of the drive motor (162); The strengths of the sealing films (165) are all different.

2. A system for detecting calcium oxide content in an inorganic binder according to claim 1, characterized in that: In a direction close to the center of the top surface of the detection box (11), the distance between the top surface of the detection box (11) and the bottom surface of the detection box (11) tends to increase; The exhaust valve (13) is located at the highest point of the top surface of the detection box (11).

3. A system for detecting calcium oxide content in an inorganic binder according to claim 1 or 2, characterized in that: The exhaust valve (13) comprises: A valve body (131) is communicated with the space in the detection box (11); and A one-way air-permeable membrane (132) is disposed in the valve body (131) and divides the space in the valve body (131) into a first space (133) and a second space (134); The first space (133) is in communication with the space in the detection box (11); The second space (134) communicates with the external atmosphere.

4. A system for detecting calcium oxide content in an inorganic binder according to claim 3, characterized in that: The liquid level detection unit (15) comprises: A pressure sensor (151) is disposed on the valve body (131), and a detection end of the pressure sensor (151) extends into the first space (133); A liquid sensor (152) is disposed on the valve body (131), and a detection end of the liquid sensor (152) extends into the second space (134); and The controller (6) is used to communicate data with the injection unit (14) based on feedback from the pressure sensor (151) and the liquid sensor (152).

5. A system for detecting calcium oxide content in an inorganic binder according to claim 4, characterized in that: The detection end of the pressure sensor (151) abuts against the one-way air permeable membrane (132).

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