EDTA (Ethylene Diamine Tetraacetic Acid) titration detection device

Abstract

The utility model relates to an EDTA titration detection device, and relates to the technical field of cement content detection.The EDTA titration detection device comprises a base, a titration assembly and a control assembly, the titration assembly comprises a conical flask and a burette, and the conical flask is arranged on the base; the burette is detachably connected to the base and is positioned above the opening end of the conical flask; a piston is arranged on the burette; the control assembly is arranged on the piston and is used for controlling the titration amount of the burette. The method has the effect of improving the accuracy of the detection result.

Description

Technical Field

[0001] This application relates to the technical field of cement content detection, and particularly to an EDTA titration detection device. Background Art

[0002] In current road construction of transportation engineering, when evaluating construction quality, it is necessary to quickly determine the dosages of cement and lime in cement and lime stabilized soil and check the mixing uniformity. The mainstream ash dosage detections are direct-reading calcium meters and the EDTA method.

[0003] Chinese Patent with the authorization announcement number CN215005005U discloses a fully automatic integrated EDTA titration detection device, including a base, a sample bottle, a spiral stirrer, a suction flask, a calcon indicator volumetric flask, a sodium hydroxide volumetric flask, an EDTA disodium volumetric flask, and a magnetic stirrer.

[0004] However, since the indicator requires a certain time to react and change color, the burette cannot perform accurate titration, resulting in inaccurate detection results. Utility Model Content

[0005] To improve the accuracy of detection results, this application provides an EDTA titration detection device.

[0006] An EDTA titration detection device provided by this application adopts the following technical solution:

[0007] An EDTA titration detection device includes a base, a titration assembly, and a control assembly. The titration assembly includes a conical flask and a burette. The conical flask is arranged on the base; the burette is detachably connected to the base and is located above the mouth end of the conical flask; a piston is arranged on the burette; the control assembly is arranged on the piston and is used to control the titration volume of the burette.

[0008] By adopting the above technical solution, the control assembly controls the rotation of the piston. When the piston is opened, the reagent in the burette drops into the conical flask and reacts with the indicator therein. After one drop is completed, the control assembly controls the rotation of the piston to close the piston and waits for the color of the indicator to change. When the color remains unchanged, the piston is opened again to add the reagent; when the color changes, the piston is closed, indicating that the detection is just completed. Thus, it is not necessary to add too much reagent, achieving precise control of the titration volume, and thereby facilitating the improvement of the accuracy and precision of the titration experiment.

[0009] Optionally, the control component includes a detection unit, a driving unit, a transmission unit, a linkage unit, and a stirring unit. The detection unit is disposed on the base and is configured to detect the change in the color of the liquid in the conical flask. The driving unit is disposed on the base and is configured to drive the transmission unit to rotate. Both ends of the transmission unit are respectively connected to the driving unit and the piston, and are configured to control the opening and closing of the piston. Both ends of the linkage unit are respectively connected to the transmission unit and the stirring unit, and are configured to drive the stirring unit to rotate. Both ends of the stirring unit are respectively connected to the transmission unit and the conical flask, and are configured to stir the liquid in the conical flask.

[0010] By adopting the above technical solution, the detection unit detects the change in the color of the liquid in the conical flask. When the color does not change, the detection unit drives the driving unit to start. The driving unit drives the transmission unit to rotate. The transmission unit controls the rotation of the piston to open the channel, and the reagent in the burette drops into the conical flask. At the same time, the linkage unit drives the stirring unit to rotate, and the stirring unit stirs the liquid in the conical flask to accelerate the reaction rate.

[0011] When the color changes, the detection unit drives the driving unit to stop. By real-time monitoring of the color change, it is easy to ensure the precise control of the reaction process, and thus easy to improve the accuracy and efficiency of the analysis.

[0012] Optionally, the detection unit includes a photoelectric sensor and a controller. The photoelectric sensor is embedded in the base and is located below the conical flask. The photoelectric sensor is configured to output a signal indicating the change in the color of the liquid in the conical flask. The controller is fixedly disposed on the base and is electrically connected to the photoelectric sensor. The controller responds to the signal indicating the change in the color of the liquid in the conical flask output by the photoelectric sensor and is configured to control the start and stop of the driving unit.

[0013] By adopting the above technical solution, through the photoelectric effect, the photoelectric sensor outputs a signal indicating the change in the color of the liquid in the conical flask to the controller. The controller responds to the signal indicating the change in the color of the liquid in the conical flask output by the photoelectric sensor. When the color does not change, the controller controls the driving unit to start.

[0014] When the change in the liquid color reaches the preset end condition, the controller promptly stops the driving unit, thereby stopping the titration process, preventing the occurrence of over-titration or under-titration. Through intelligent control, the working efficiency is improved, and the accuracy and reliability of the experimental results are improved.

[0015] Optionally, the driving part includes a ring gear, a planetary gear, an internal gear, and an intermittent motor. The ring gear is fixedly arranged on the base, and the planetary gear meshes with the ring gear; the internal gear is located inside the ring gear, and when the planetary gear approaches the internal gear, the planetary gear can mesh with the internal gear; the intermittent motor is fixedly arranged on the base, and the planetary gear is fixedly connected to the movable end of the intermittent motor through a connecting rod.

[0016] By adopting the above technical solution, when the color does not change, the controller controls the intermittent motor to start. The intermittent motor drives the planetary gear to rotate. The planetary gear rotates along the ring gear. When it reaches the position of the internal gear, the planetary gear drives the internal gear to rotate, so that the internal gear can rotate intermittently, and thus it is easy to accurately control the dropping amount and dropping speed of the burette.

[0017] Optionally, the transmission part includes a rotating shaft and two fixing clips. One end of the rotating shaft is coaxially and fixedly connected to the internal gear; the two fixing clips are respectively connected to both ends of the piston through fixing rods.

[0018] By adopting the above technical solution, the internal gear drives the rotating shaft to rotate, the rotating shaft drives the fixing clip to rotate, and the fixing clip drives the piston to rotate, opening the channel, so that the reagent in the burette drops into the conical flask;

[0019] When the planetary gear rotates away from the internal gear, the fixing clip drives the piston to rotate, closing the channel, completing one titration, which can ensure the accuracy and consistency of the titration process, thus helping to reduce experimental errors and discreteness, and further being easy to improve the reliability of the experimental results.

[0020] Optionally, the linkage part includes a first bevel gear, a second bevel gear, a transmission gear, and an incomplete gear. The first bevel gear is coaxially and fixedly connected to the rotating shaft, the first bevel gear meshes with the second bevel gear and is rotationally connected to the base; the transmission gear is coaxially and fixedly connected to the second bevel gear and meshes with the incomplete gear, and the incomplete gear is rotationally connected to the base.

[0021] By adopting the above technical solution, the internal gear drives the rotating shaft to rotate, the fixing rod drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the transmission gear to rotate, and the transmission gear drives the incomplete gear to rotate, so that the stirring part rotates intermittently, and thus it is easy to improve the transmission efficiency.

[0022] Optionally, the stirring part includes a spiral spring and a stirring rod. One end of the spiral spring is fixedly connected to the base through a fixing plate, and the other end is fixedly connected to the center of the incomplete gear; one end of the stirring rod is coaxially and fixedly connected to the incomplete gear.

[0023] By adopting the above technical solution, the incomplete gear drives the stirring rod to rotate. When the transmission gear drives the incomplete gear to rotate, the coil spring is tightened to store elastic force. When the incomplete gear rotates to the toothless area, under the elastic force of the coil spring, the incomplete gear rotates in the opposite direction, so that the incomplete gear meshes with the transmission gear again; at the same time, the stirring rod rotates forward and backward, accelerating the reaction speed and thus improving the experimental efficiency.

[0024] Optionally, it further includes a counting component. The counting component includes a rotational speed sensor and a display. The rotational speed sensor is fixedly arranged on the internal gear and is used for outputting the rotation signal of the internal gear; the display is fixedly arranged on the base and is electrically connected to the rotational speed sensor, and the display is used for displaying the titration times.

[0025] By adopting the above technical solution, by setting the rotational speed, when the internal gear rotates one circle, the piston opens and closes once. The rotational speed sensor outputs the rotation signal of the internal gear to the display, and the display shows the titration times. By visually displaying the titration times on the display, the operator can quickly understand the titration progress without frequently manually counting or checking the titration status, thus helping to improve the work efficiency.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. By setting the photoelectric sensor and the controller, the situation of over-titration or under-titration is prevented, and through intelligent control, the work efficiency is improved;

[0028] 2. By setting the gear ring, planetary gear, internal gear and intermittent motor, the internal gear can perform intermittent rotation, and thus it is easy to accurately control the titrant volume and titration speed of the burette;

[0029] 3. By setting the rotating shaft and two fixed clamps, the accuracy and consistency of the titration process can be ensured, which helps to reduce experimental errors and discreteness, and thus it is easy to improve the reliability of experimental results;

[0030] 4. By setting the first bevel gear, second bevel gear, transmission gear and incomplete gear, the transmission efficiency is easily improved;

[0031] 5. By setting the coil spring and the stirring rod, the stirring rod rotates forward and backward, accelerating the reaction speed and thus improving the experimental efficiency.

[0032] 6. By setting the rotational speed sensor and the display, the operator can quickly understand the titration progress without frequently manually counting or checking the titration status, thus helping to improve the work efficiency. Description of the Drawings

[0033] Figure 1It is a schematic structural diagram of an embodiment of the present application;

[0034] Figure 2 is Figure 1 an enlarged view of part A in

[0035] Figure 3 is Figure 1 an enlarged view of part B in

[0036] Explanation of reference numerals:

[0037] 1. Base; 11. Vertical plate; 111. Support plate; 2. Titration assembly; 21. Erlenmeyer flask; 22. Burette; 221. Piston; 3. Control assembly; 31. Detection part; 311. Photoelectric sensor; 312. Controller; 32. Driving part; 321. Gear ring; 322. Planet gear; 323. Internal gear; 324. Intermittent motor; 3241. Connecting rod; 33. Transmission part; 331. Rotating shaft; 332. Fixed clamp; 34. Linkage part; 341. First bevel gear; 342. Second bevel gear; 343. Transmission gear; 344. Incomplete gear; 35. Stirring part; 351. Torsion spring; 352. Stirring rod; 4. Counting assembly; 41. Rotation speed sensor; 42. Display. Detailed implementation manners

[0038] The following Figures 1-3 further elaborates on the present application in detail with reference to the attached drawings.

[0039] An embodiment of the present application discloses an EDTA titration detection device. Referring to Figure 1 , an EDTA titration detection device includes a base 1, a titration assembly 2, a control assembly 3, and a counting assembly 4. The titration assembly 2 is arranged on the base 1 and is used for performing titration experiments; the control assembly 3 is arranged on the base 1 and is used for controlling the number of titrations of the titration assembly 2; the counting assembly 4 is arranged on the titration assembly 2 and is used for recording the number of titrations.

[0040] During use, the titration assembly 2 performs titration experiments. During the experiment, the control assembly 3 controls the number of titrations of the titration assembly 2. During titration, the counting assembly 4 records the number of titrations, thereby facilitating the improvement of the accuracy and precision of the titration experiment.

[0041] Referring to Figure 1 , the base 1 is in the shape of a rectangular plate and is horizontally arranged. A vertical plate 11 is fixedly provided on one side of the base 1. The titration assembly 2 includes an Erlenmeyer flask 21 and a burette 22. The Erlenmeyer flask 21 is vertically placed on the base 1. The burette 22 is vertically arranged and is fixedly connected to the vertical plate 11 through a clamping ring. The burette 22 is located above the mouth end of the Erlenmeyer flask 21, and the bottom end thereof is inserted into the Erlenmeyer flask 21. A piston 221 is provided on the burette 22.

[0042] During use, turn the piston 221. When the piston 221 is opened, the reagent in the burette 22 drops into the conical flask 21 and reacts with the indicator therein. After one drop is completed, close the piston 221 and wait for the color of the indicator to change, making it easier to conduct the titration experiment.

[0043] Refer to Figures 1 to 3 , the control component 3 includes a detection unit 31, a drive unit 32, a transmission unit 33, a linkage unit 34, and a stirring unit 35. The detection unit 31 includes a photoelectric sensor 311 and a controller 312. The photoelectric sensor 311 is embedded in the base 1 and is located below the conical flask 21. The photoelectric sensor 311 is used to output a signal indicating the change in the color of the liquid in the conical flask 21.

[0044] Refer to Figure 1 , the controller 312 is fixedly arranged on the base 1 and is electrically connected to the photoelectric sensor 311. The controller 312 responds to the signal of the change in the color of the liquid in the conical flask 21 output by the photoelectric sensor 311.

[0045] Refer to Figure 1 and Figure 2 , the drive unit 32 includes a gear ring 321, a planetary gear 322, an internal gear 323, and an intermittent motor 324. The gear ring 321 is fixedly arranged on the vertical plate 11 through a support plate 111. The planetary gear 322 meshes with the gear ring 321; the internal gear 323 is located inside the gear ring 321 and is offset from the center of the gear ring 321. When the planetary gear 322 approaches the internal gear 323, the planetary gear 322 can mesh with the internal gear 323; the intermittent motor 324 is fixedly arranged on the vertical plate 11, and the planetary gear 322 is fixedly connected to the output shaft of the intermittent motor 324 through a connecting rod 3241.

[0046] Refer to Figure 1 , the transmission unit 33 includes a rotating shaft 331 and two fixed clamps 332. One end of the rotating shaft 331 is coaxially fixedly connected to the internal gear 323 and is located on the side of the internal gear 323 away from the vertical plate 11; the two fixed clamps 332 are respectively connected to both ends of the piston 221 through fixing rods.

[0047] Refer to Figure 1 and Figure 3 , the linkage unit 34 includes a first bevel gear 341, a second bevel gear 342, a transmission gear 343, and an incomplete gear 344. The first bevel gear 341 is coaxially fixedly connected to the rotating shaft 331 and is located between the fixed clamp 332 and the internal gear 323. The first bevel gear 341 meshes with the second bevel gear 342, and the second bevel gear 342 is rotatably connected to the support plate 111. The transmission gear 343 is coaxially fixedly connected to the second bevel gear 342 and meshes with the incomplete gear 344. The incomplete gear 344 is rotatably connected to the support plate 111 through a connecting plate.

[0048] Refer to Figure 1 andFigure 3 The stirring part 35 includes a spiral spring 351 and a stirring rod 352. One end of the spiral spring 351 is fixedly connected to the support plate 111 through a connecting plate, and the other end is fixedly connected to the center of the incomplete gear 344. One end of the stirring rod 352 is coaxially fixedly connected to the incomplete gear 344.

[0049] During use, the photoelectric sensor 311 outputs a signal of the color change of the liquid in the conical flask 21 to the controller 312. The controller 312 responds to the signal of the color change of the liquid in the conical flask 21 output by the photoelectric sensor 311. When the color does not change, the controller 312 controls the intermittent motor 324 to start. The intermittent motor 324 drives the planetary gear 322 to rotate. The planetary gear 322 rotates along the toothed ring 321. When it reaches the position of the internal gear 323, the planetary gear 322 drives the internal gear 323 to rotate. The internal gear 323 drives the rotating shaft 331 to rotate. The rotating shaft 331 drives the fixed clamp 332 to rotate. The fixed clamp 332 drives the piston 221 to rotate. When the planetary gear 322 rotates away from the internal gear 323, the fixed clamp 332 drives the piston 221 to rotate, closing the channel and completing one titration.

[0050] While the internal gear 323 is rotating, the internal gear 323 drives the rotating shaft 331 to rotate. The fixed rod drives the first bevel gear 341 to rotate. The first bevel gear 341 drives the second bevel gear 342 to rotate. The second bevel gear 342 drives the transmission gear 343 to rotate. The transmission gear 343 drives the incomplete gear 344 to rotate. The incomplete gear 344 drives the stirring rod 352 to rotate. When the transmission gear 343 drives the incomplete gear 344 to rotate, the spiral spring 351 is tightened and stores elastic force. When the incomplete gear 344 rotates to the toothless area, under the elastic force of the spiral spring 351, the incomplete gear 344 rotates in the opposite direction, enabling the incomplete gear 344 to re-engage with the transmission gear 343, causing the stirring rod 352 to rotate forward and backward, thus facilitating the precise control of the reaction process and improving the accuracy and efficiency of the analysis.

[0051] Refer to Figure 1 and Figure 2 The counting component 4 includes a rotational speed sensor 41 and a display 42. The rotational speed sensor 41 is fixedly arranged on the internal gear 323 and is used to output the rotation signal of the internal gear 323. The display 42 is fixedly arranged on the vertical plate 11 and is electrically connected to the rotational speed sensor 41. The display 42 is used to display the titration times.

[0052] During use, the rotational speed sensor 41 outputs the rotation signal of the internal gear 323 to the display 42. The display 42 shows the titration times. By visually displaying the titration times on the display 42, the operator can quickly understand the titration progress without having to manually count frequently or check the titration status, thus helping to improve work efficiency.

[0053] The implementation principle of an EDTA titration detection device in an embodiment of this application is as follows: The photoelectric sensor 311 outputs a signal of the color change of the liquid in the conical flask 21 to the controller 312. The controller 312 responds to the signal of the color change of the liquid in the conical flask 21 output by the photoelectric sensor 311. When the color does not change, the controller 312 controls the intermittent motor 324 to start. The intermittent motor 324 drives the planetary gear 322 to rotate. The planetary gear 322 rotates along the gear ring 321. When it reaches the position of the internal gear 323, the planetary gear 322 drives the internal gear 323 to rotate. The internal gear 323 drives the rotating shaft 331 to rotate. The rotating shaft 331 drives the fixed clamp 332 to rotate. The fixed clamp 332 drives the piston 221 to rotate. When the planetary gear 322 rotates away from the internal gear 323, the fixed clamp 332 drives the piston 221 to rotate, closing the channel and completing one titration.

[0054] While the internal gear 323 is rotating, the internal gear 323 drives the rotating shaft 331 to rotate. The fixed rod drives the first bevel gear 341 to rotate. The first bevel gear 341 drives the second bevel gear 342 to rotate. The second bevel gear 342 drives the transmission gear 343 to rotate. The transmission gear 343 drives the incomplete gear 344 to rotate. The incomplete gear 344 drives the stirring rod 352 to rotate. When the transmission gear 343 drives the incomplete gear 344 to rotate, the coil spring 351 is tightened and stores elastic force. When the incomplete gear 344 rotates to the toothless area, under the elastic force of the coil spring 351, the incomplete gear 344 rotates in the opposite direction, enabling the incomplete gear 344 to re-engage with the transmission gear 343 and causing the stirring rod 352 to rotate forward and backward.

[0055] During the titration process, the rotational speed sensor 41 outputs a rotation signal of the internal gear 323 to the display 42. The display 42 shows the number of titrations. By visually displaying the number of titrations on the display 42, the operator can quickly understand the titration progress, thus easily ensuring the precise control of the reaction process and further easily improving the accuracy and efficiency of the analysis.

[0056] The above are all preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An EDTA titration detection device, characterized in that: It includes a base (1), a titration assembly (2) and a control assembly (3). The titration assembly (2) includes an Erlenmeyer flask (21) and a burette (22). The Erlenmeyer flask (21) is arranged on the base (1); the burette (22) is detachably connected to the base (1) and is located above the mouth end of the Erlenmeyer flask (21); a piston (221) is arranged on the burette (22); the control assembly (3) is arranged on the piston (221) and is used to control the titration volume of the burette (22).

2. The EDTA titration detection device according to claim 1, wherein: The control assembly (3) includes a detection unit (31), a driving unit (32), a transmission unit (33), a linkage unit (34) and a stirring unit (35). The detection unit (31) is arranged on the base (1) and is used to detect the change in the liquid color in the Erlenmeyer flask (21); the driving unit (32) is arranged on the base (1) and is used to drive the transmission unit (33) to rotate; both ends of the transmission unit (33) are respectively connected to the driving unit (32) and the piston (221), and are used to control the opening and closing of the piston (221); both ends of the linkage unit (34) are respectively connected to the transmission unit (33) and the stirring unit (35), and are used to drive the stirring unit (35) to rotate; both ends of the stirring unit (35) are respectively connected to the transmission unit (33) and the Erlenmeyer flask (21), and are used to stir the liquid in the Erlenmeyer flask (21).

3. An EDTA titration detection device according to claim 2, characterized in that: The detection unit (31) includes a photoelectric sensor (311) and a controller (312). The photoelectric sensor (311) is embedded in the base (1) and is located below the Erlenmeyer flask (21). The photoelectric sensor (311) is used to output a signal of the change in the liquid color in the Erlenmeyer flask (21); the controller (312) is fixedly arranged on the base (1) and is electrically connected to the photoelectric sensor (311). The controller (312) responds to the signal of the change in the liquid color in the Erlenmeyer flask (21) output by the photoelectric sensor (311) and is used to control the start and stop of the driving unit (32).

4. An EDTA titration detection device according to claim 3, characterized in that: The driving unit (32) includes a gear ring (321), a planetary gear (322), an internal gear (323) and an intermittent motor (324). The gear ring (321) is fixedly arranged on the base (1), and the planetary gear (322) meshes with the gear ring (321); the internal gear (323) is located inside the gear ring (321). When the planetary gear (322) approaches the internal gear (323), the planetary gear (322) can mesh with the internal gear (323); the intermittent motor (324) is fixedly arranged on the base (1), and the planetary gear (322) is fixedly connected to the movable end of the intermittent motor (324) through a connecting rod (3241).

5. An EDTA titration detection device according to claim 4, characterized in that: The transmission part (33) includes a rotating shaft (331) and two fixing clips (332). One end of the rotating shaft (331) is coaxially and fixedly connected to the internal gear (323); the two fixing clips (332) are respectively connected to both ends of the piston (221) through fixing rods.

6. The EDTA titration detection device according to claim 5, wherein: The linkage part (34) includes a first bevel gear (341), a second bevel gear (342), a transmission gear (343) and an incomplete gear (344). The first bevel gear (341) is coaxially and fixedly connected to the rotating shaft (331). The first bevel gear (341) meshes with the second bevel gear (342) and is rotatably connected to the base (1); the transmission gear (343) is coaxially and fixedly connected to the second bevel gear (342) and meshes with the incomplete gear (344). The incomplete gear (344) is rotatably connected to the base (1).

7. An EDTA titration detection device according to claim 6, characterized in that: The stirring part (35) includes a torsion spring (351) and a stirring rod (352). One end of the torsion spring (351) is fixedly connected to the base (1) through a fixing plate, and the other end is fixedly connected to the center of the incomplete gear (344); one end of the stirring rod (352) is coaxially and fixedly connected to the incomplete gear (344).

8. An EDTA titration detection device according to claim 4, characterized in that: It further includes a counting component (4). The counting component (4) includes a rotational speed sensor (41) and a display (42). The rotational speed sensor (41) is fixedly arranged on the internal gear (323) and is used for outputting the rotation signal of the internal gear (323); the display (42) is fixedly arranged on the base (1) and is electrically connected to the rotational speed sensor (41). The display (42) is used for displaying the titration times.

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