Automatic quantitative acid adding device in a sample dissolving system

Abstract

The application provides an automatic quantitative acid adding device in a sample dissolving system, which comprises a support frame, a sliding assembly arranged on the support frame, a converter and an acid adding and stirring module arranged in sequence from top to bottom on the sliding assembly, a temperature control heating plate and a plurality of acid adding stations arranged on the bottom of the support frame; the converter comprises a plurality of liquid storage cylinders, each of which can correspond to the acid adding and stirring module; the acid adding and stirring module comprises a first acid liquid adding control unit, an acid liquid stirrer and a second acid liquid adding control unit; and the sliding track of the sliding assembly is matched with the arrangement mode of the acid adding stations. The application has the advantages that the automatic acid adding of the sample dissolving system can be realized, the acid adding amount is convenient to control, the acid liquid stirring can be completed, and the acid adding effect is improved.

Description

Technical Field

[0001] This invention relates to the field of acid addition technology in sample dissolution systems, and in particular to an automatic quantitative acid addition device for sample dissolution systems. Background Technology

[0002] Sample dissolution is a critical limiting factor for overall mass spectrometry analysis. During dissolution, acidic solutions are primarily added manually. For example, Chinese patent CN201620477900X, authorized on December 7, 2016, describes a "Batch Dissolution Apparatus for Total Organic Carbon Determination," which involves dissolution components such as an acid-adding device, a hot plate, and a fixed plate hole. The acid-adding device includes a dropper rubber bladder and a glass tube. The bottom of the glass tube has several parallel and interconnected dropper nozzles, and acid is added manually by operating the rubber bladder. However, this method of adding acid cannot precisely control the amount and rate of acid addition. If the amount of acid added is lower than the standard value, the sample will not dissolve completely, resulting in decreased analytical accuracy. If the amount of acid added is higher than the standard value, impurities in the acid will also cause deviations in the test results. Furthermore, the use of acidic solutions poses significant safety hazards; manual acid addition can easily cause corrosive injuries to operators. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the present invention provides an automatic quantitative acid addition device for a sample dissolution system, which can realize automatic acid addition in the sample dissolution system, conveniently control the amount of acid added, and can complete acid stirring to improve the acid addition effect.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] An automatic quantitative acid addition device in a sample dissolution system includes a support frame with a sliding assembly on the support frame. The sliding assembly has a converter and an acid addition stirring module arranged sequentially from top to bottom. The bottom of the support frame has a temperature-controlled heating plate and several acid addition stations. The converter includes several liquid storage cylinders, each of which can correspond to the acid addition stirring module. The acid addition stirring module includes a first acid addition control unit, an acid stirrer, and a second acid addition control unit. The sliding trajectory of the sliding assembly is coordinated with the arrangement of the acid addition stations.

[0006] The position of the acid addition and stirring module can be adjusted by the sliding component, and different acid solutions from different storage tanks can be transferred to the acid addition and stirring module by the converter, so that acid solutions of different ratios can be mixed and added. No manual operation is required, reducing the corrosive harm to operators, and it has the characteristics of safety, precision and efficiency.

[0007] Preferably, the converter includes a fixed rod connected to a sliding assembly, a horizontally rotating disk on the fixed rod, and several liquid storage cylinders arranged in a circumferential array around the axis of the rotating disk. Each liquid storage cylinder has a control needle valve at its lower end. The rotation is achieved by the arrangement of the rotating disk, thereby realizing the individual switching of the liquid storage cylinders. Since each liquid storage cylinder has a control needle valve at its lower end, it can be independently controlled to achieve the addition of different acid solutions.

[0008] Preferably, the sliding assembly includes a sliding guide rail mounted on a support frame, and a slider slidably connected to the sliding guide rail. The slider has a U-shaped cross-section, and the sliding guide rail is located on the central axis of the slider. The U-shaped slider has high structural stability during sliding, ensuring the reliability of the acid addition and stirring module.

[0009] Preferably, the sliding guide rail has several equidistant positioning screw holes, and the slider has positioning bolts for engaging with the positioning screw holes. The positioning bolts are equipped with force-applying crossbars. The force-applying crossbars reliably operate the positioning bolts, and after the positioning bolts and positioning screw holes are threadedly tightened, the sliding guide rail and slider are reliably limited in the lateral direction.

[0010] Preferably, a support rod is fixedly mounted on the fixed rod or sliding assembly. The support rod has several rotatable and adjustable connecting rods. The first acid addition control unit, the acid stirrer, and the second acid addition control unit are respectively mounted on different connecting rods. The connecting rods on the support rod allow for the separate connection of the acid addition and stirring modules. The positions of the connecting rods are rotatable and adjustable, ensuring controllability at each position.

[0011] Preferably, the outlet of the first acid addition control unit is vertically aligned with the inlet of the acid stirrer, and the outlet of the acid stirrer is vertically aligned with the inlet of the second acid addition control unit. The acid stirrer is separated from both the first and second acid addition control units, and each of the acid stirrer's outlet and inlet is equipped with a control valve. This separation of the acid stirrer from the first and second acid addition control units, along with the corresponding vertical alignment of the outlet and inlet, ensures efficient acid addition.

[0012] Preferably, the acid agitator includes a motor fixed to a connecting rod and a rotating frame rotatably connected to the connecting rod. The motor drives the rotating frame to rotate. The acid agitator also includes a mixing cylinder fixed to the rotating frame. The inlet and outlet of the acid agitator are located at opposite ends of the mixing cylinder. A conical storage tank is fixedly provided at the outer end of the inlet of the acid agitator. Since the acid agitator is separately configured from the first acid addition control unit and the second acid addition control unit, the rotation of the acid agitator can be controlled arbitrarily. The inlet and outlet of the acid agitator can be sealed at both ends by a control valve. Therefore, reliable stirring of the acid agitator can be achieved by driving the rotating frame with the motor, and the stirring effect is reliable.

[0013] Preferably, the first acid addition control unit includes a storage tank, a needle valve, and an electromagnetic flow meter arranged sequentially from top to bottom. The structure of the second acid addition control unit is the same as that of the first acid addition control unit. The storage tank is used to receive the acid, and the flow control is achieved through the needle valve. In conjunction with the electromagnetic flow meter, a sufficient and accurate amount of acid can be added, allowing for precise control of the amount of acid added and the dripping rate during the sample dissolution process, thus improving the accuracy of the addition.

[0014] Preferably, the temperature-controlled heating plate is equipped with a sliding protective cover and an inner liner for storing the dissolving sample beaker. The sliding protective cover has a liquid filling hole corresponding to the center of the inner liner. The beaker is placed through the inner liner, and the protective cover protects the inner liner.

[0015] Preferably, the support frame is equipped with a control panel, which is connected to the first acid addition control unit, the acid stirrer, and the second acid addition control unit via signal lines. The control panel includes a digital display controller for the flow rate and time of the acid flow meter and a power and speed selection switch for the acid stirrer. The control panel integrates and controls the acid dosage, enabling precise control of the acid addition amount.

[0016] The beneficial effects of this invention are: it enables automatic acid addition to the sample dissolution system, facilitates control of the amount of acid added, and enables acid mixing, thereby improving the acid addition effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a front view schematic diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the converter in this invention.

[0020] Figure 4 This is a schematic diagram of the acid-adding stirring module in this invention.

[0021] In the diagram: 1. Support frame; 2. Sliding assembly; 3. Sliding guide rail; 4. Slider; 5. Positioning screw hole; 6. Positioning bolt; 7. Force application crossbar; 8. Converter; 9. Storage cylinder; 10. Fixing rod; 11. Rotating disk; 22. Control needle valve; 33. Drive motor; 44. Transmission gear; 5. Acid addition stirring module; 6. Support rod; 7. Connecting rod; 8. Clamp; 8. Storage tank; 9. Needle valve; 10. Electromagnetic flowmeter; 11. First acid addition control unit; 12. Acid stirrer; 13. Motor; 14. Rotating frame; 15. Mixing cylinder; 16. Conical storage tank; 17. Control valve; 18. Second acid addition control unit; 19. Temperature control heating plate; 20. Acid addition station; 20. Inner liner; 21. Horizontal protective cover; 22. Liquid addition through hole; 33. Control panel. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0023] Example 1,

[0024] like Figure 1 and Figure 4As shown, an automatic quantitative acid addition device in a sample dissolution system includes a support frame 1, which adopts a gantry structure. The lower end of the support frame 1 is slidably mounted, and a sliding component 2 is provided on the support frame 1, located at the upper end of the support frame 1. The sliding component 2, from top to bottom, includes a converter 3 and an acid addition stirring module 4. The bottom of the support frame 1 has a temperature-controlled heating plate 5 and several acid addition stations 6. The temperature-controlled heating plate 5 has a sliding protective cover 602 and an inner liner 601 for storing the dissolved sample beaker. The sliding protective cover 602 has a liquid addition through hole 603 corresponding to the center position of the inner liner 601. The acid addition stations 6, i.e., the inner liner 601, are arranged in a straight line. The converter 3 includes several liquid storage cylinders 31, each of which corresponds to the acid addition stirring module 4. The acid addition stirring module 4 includes a first acid addition control unit 41, an acid stirrer 42, and a second acid addition control unit 43. The sliding trajectory of the sliding component 2 is coordinated with the arrangement of the acid addition stations 6. The sliding assembly 2 includes a sliding guide rail 201 mounted on the support frame 1, the sliding guide rail 201 being linearly arranged. A slider 202, slidably connected to the sliding guide rail 201, is provided on the sliding guide rail 201. The slider 202 has a U-shaped cross-section, and the sliding guide rail 201 is located on the central axis of the slider 202. In this embodiment, the sliding guide rail 201 is part of the support frame 1. The sliding guide rail 201 has several equidistant positioning screw holes 203, and the slider 202 has positioning bolts 204 for engaging the positioning screw holes 203. A force-applying crossbar 205 is provided on the positioning bolts 204. The support frame 1 has a control panel 7, which is connected to the first acid addition control unit 41, the acid stirrer 42, and the second acid addition control unit 43 via signal lines. The control panel 7 includes a flow and time digital display controller for the acid flow meter and a power and speed selection switch for the acid stirrer 42.

[0025] The converter 3 includes a fixed rod 301 connected to the sliding assembly 2. A horizontally rotating disk 302 is mounted on the fixed rod 301. Several liquid storage cylinders 31 are arranged in a circumferential array around the axis of the rotating disk 302. Each liquid storage cylinder 31 has a control needle valve 303 at its lower end. The rotating disk 302 and the fixed rod 301 are rotatably connected via bearings. A drive motor 304 is mounted on the slider 202, and a cooperating transmission gear 305 is provided between the drive motor 304 and the rotating disk 302. A support rod 401 is fixedly mounted on the fixed rod 301 or the sliding assembly 2. In this embodiment, the support rod 401 is fixed to the slider 202, and the drive motor 304 and the support rod 401 are located on opposite sides of the fixed rod 301. The drive motor 304 and the support rod 401 provide counterweight at both ends of the slider 202, improving the overall stability of the mechanism. The support rod 401 is equipped with several rotatable and adjustable connecting rods 402. An adjusting gear ring is coaxially fixed to the support rod 401. A clamp 403, which engages with the adjusting gear ring, is provided at one end of each connecting rod 402. The clamp 403 tightens to connect the connecting rod 402 to the support rod 401. The connecting rod 402 can rotate a certain angle before being tightened by the clamp 403, facilitating adjustment. The first acid addition control unit 41, the acid stirrer 42, and the second acid addition control unit 43 are respectively mounted on different connecting rods 402. The first acid addition control unit 41 includes, from top to bottom, a storage tank 404, a needle valve 405, and an electromagnetic flowmeter 406. The storage tank 404 has a conical, upward-opening structure, with the upper end of the storage tank 404 serving as the inlet and the outlet of the electromagnetic flowmeter 406 serving as the outlet. The structure of the second acid addition control unit 43 is the same as that of the first acid addition control unit 41. The acid stirrer 42 includes a motor 421 fixed on a corresponding connecting rod 402 and a rotating frame 422 rotatably connected to the connecting rod 402. The motor 421 drives the rotating frame 422 to rotate. A transmission pair is provided between the rotating frame 422 and the motor 421. The transmission pair can be a gear pair, a pulley combination, or other transmission components. The acid stirrer 42 also includes a mixing cylinder 423 fixed on the rotating frame 422. The inlet and outlet of the acid stirrer 42 are located at opposite ends of the mixing cylinder 423. A conical storage tank 424 is fixedly provided at the outer end of the inlet of the acid stirrer 42. The outlet of the first acid addition control unit 41 is vertically aligned with the inlet of the acid stirrer 42. The outlet of the acid stirrer 42 is vertically aligned with the inlet of the second acid addition control unit 43. The acid stirrer 42 is separate from both the first and second acid addition control units 41 and 43. Control valves 425 are provided at both the outlet and inlet of the acid stirrer 42. The needle valve 405, control valve 425, and control needle valve 303 can all be electrically controlled valves, with the control valve 425 potentially controlled remotely via Bluetooth or other signals.

[0026] In operation, an appropriate amount of acid is added to the storage tank 31 in the converter 3. The water inlet pipe can be connected to different storage tanks 31 and is connected to an external water pipe. The converter 3 allows for the interchange of storage tanks 31 with different acids to correspond to the acid addition and stirring module 4. The position of the acid addition and stirring module 4 is adjusted by moving the slider 202. The movement of the slider 202 can be adjusted manually or by fixing a stepper motor to the slider 202. The stepper motor has a traveling gear, and a traveling rack is set on one side of the sliding guide rail 201. The slider 202 moves automatically by meshing the traveling gear and the traveling rack, and the stepper motor drives the traveling gear to rotate. When using the stepper motor for electric control, the fixing method of the positioning bolt 204 and positioning screw hole 203 is not required. After the acid stirrer 42, the first acid addition control unit 41, and the second acid addition control unit 43 are turned on, the amount and speed of acid addition can be adjusted through the control panel 7.

[0027] To mix the acid, open the control needle valve 303 at the lower end of the storage cylinder 31, the needle valve 405 on the first acid addition control unit 41, and the control valve 425 at the upper end of the mixing cylinder 423. Close the control valve 425 at the lower end of the mixing cylinder 423. Adjust the amount of different acids added through the first acid addition control unit 41. Then close the control valve 425 at the upper end of the mixing cylinder 423. Adjust the power and speed of the motor 421 through the control panel 7 to mix the acid. After the mixing cylinder 423 is in the correct position, open the control valves 425 at the upper and lower ends of the mixing cylinder 423 and the needle valve 405 at the lower end of the second acid addition control unit 43. Adjust the amount and speed of acid addition through the control panel 7.

[0028] This invention, through its integrated automated design, enables automatic and precise control of acidic solution addition during sample dissolution, improving work efficiency, reducing operator workload, and enhancing operational safety. Besides supporting the addition of single acid solutions, it also allows for the addition of mixed acid solutions. The first acid addition control unit 41 controls the amount of different acid solutions added, while the acid stirrer 42 ensures uniform mixing. The second acid addition control unit 43 controls the amount and speed of the mixed acid solution addition. The temperature-controlled heating plate 5 is equipped with an inner liner 601 and a protective cover. The inner liner 601 ensures uniform heating temperature during the sample dissolution process, while the protective cover effectively prevents acid evaporation during heating, protecting the environment and reducing harm to operators.

Claims

1. An automatic quantitative acid addition device in a sample dissolution system, characterized in that, The device includes a support frame with a sliding assembly. From top to bottom, the sliding assembly contains a converter and an acid addition and stirring module. The bottom of the support frame has a temperature-controlled heating plate and several acid addition stations. The converter includes several liquid storage cylinders, each corresponding to an acid addition and stirring module. The acid addition and stirring module includes a first acid addition control unit, an acid stirrer, and a second acid addition control unit. The sliding trajectory of the sliding assembly is coordinated with the arrangement of the acid addition stations. The acid stirrer is separately installed from both the first acid addition control unit and the second acid addition control unit. The acid stirrer includes a motor fixed on a connecting rod and a rotating frame rotatably connected to the connecting rod. The motor drives the rotating frame to rotate. The acid stirrer also includes a mixing cylinder fixed on the rotating frame. The inlet and outlet of the acid mixer are located at opposite ends of the mixing tank, and each is equipped with a control valve. The first acid addition control unit includes a storage tank, a needle valve, and an electromagnetic flow meter arranged sequentially from top to bottom. The structure of the second acid addition control unit is the same as that of the first acid addition control unit.

2. The automatic quantitative acid addition device in a sample dissolution system according to claim 1, characterized in that, The converter includes a fixed rod connected to a sliding assembly, a horizontally rotating disk on the fixed rod, and several liquid storage cylinders arranged in a circumferential array around the axis of the rotating disk. Each liquid storage cylinder has a control needle valve at its lower end.

3. The automatic quantitative acid addition device in a sample dissolution system according to claim 1, characterized in that, The sliding assembly includes a sliding guide rail mounted on a support frame, and a slider slidably connected to the sliding guide rail. The slider has a "U" shaped cross-section, and the sliding guide rail is located on the central axis of the slider.

4. The automatic quantitative acid addition device in a sample dissolution system according to claim 3, characterized in that, The sliding guide rail is provided with a number of equidistant positioning screw holes, and the slider is provided with positioning bolts for matching the positioning screw holes. The positioning bolts are provided with force-applying crossbars.

5. An automatic quantitative acid addition device in a sample dissolution system according to claim 2, characterized in that, A support rod is fixedly provided on the fixed rod or sliding assembly. Several rotatable and adjustable connecting rods are provided on the support rod. The first acid addition control unit, the acid stirrer, and the second acid addition control unit are respectively set on different connecting rods.

6. An automatic quantitative acid addition device in a sample dissolution system according to claim 1 or 5, characterized in that, The outlet of the first acid addition control unit is vertically aligned with the inlet of the acid stirrer, and the outlet of the acid stirrer is vertically aligned with the inlet of the second acid addition control unit.

7. An automatic quantitative acid addition device in a sample dissolution system according to claim 6, characterized in that, A conical storage tank is fixedly installed at the outer end of the inlet of the acid mixer.

8. The automatic quantitative acid addition device in a sample dissolution system according to claim 1, characterized in that, The temperature-controlled heating plate is equipped with a sliding protective cover and an inner liner for storing the dissolved sample beaker. The sliding protective cover has a liquid filling hole at the center of the inner liner.

9. An automatic quantitative acid addition device in a sample dissolution system according to claim 1, characterized in that, The support frame is equipped with a control panel, which is connected to the first acid addition control unit, the acid stirrer, and the second acid addition control unit via signal lines. The control panel is equipped with a flow and time digital display controller for the acid flow meter and a power and speed selection switch for the acid stirrer.

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