Automatic liquid dropping device suitable for Abell stability test

Abstract

The utility model relates to the technical field of Abell stability test equipment, and discloses an automatic liquid dropping device suitable for an Abell stability test. The grabbing mechanism and the liquid dropping mechanism are installed on the workbench, the grabbing mechanism comprises a clamping assembly and is used for clamping a test paper frame in a releasable mode, the lower end of the test paper frame is used for being connected with potassium iodide starch test paper, the liquid dropping mechanism comprises a liquid transferring air pump, and the liquid transferring air pump is used for sucking dropping liquid and dropwise adding the dropping liquid to the potassium iodide starch test paper; the monitoring unit is used for identifying the dropping process of the pipetting air pump and the potassium iodide starch test paper; and the control unit is electrically connected with the clamping assembly, the pipetting air pump and the monitoring unit. The utility model aims to reduce the test error caused by manual operation and achieve the automatic liquid dropping operation of the potassium iodide starch solution.

Description

Technical Field

[0001] This utility model relates to the technical field of Abel stability testing equipment, and in particular to an automated dripping device suitable for Abel stability testing. Background Technology

[0002] The Abel test for the stability of nitroglycerin involves heating nitroglycerin at 72°C, causing the released nitrogen oxide gas to react with potassium iodide on test paper. The time it takes for a brown line to appear is used to measure its stability. All steps in the test require manual operation.

[0003] Specifically, in the wetting process of potassium iodide starch test paper, the amount of glycerol aqueous solution added must be precisely controlled within the range of 3μL to 4μL. At the same time, potassium iodide starch test paper should be kept away from prolonged exposure to air and strong light to prevent affecting the test results.

[0004] Manual liquid application has several drawbacks. Long-term, repetitive manual labor can lead to fatigue, further increasing the probability of errors. Moreover, the amount of liquid applied manually is difficult to control precisely, failing to meet the requirements of high-precision testing. Furthermore, the accuracy and timing of liquid application during manual operation significantly impact the accuracy of the experiment.

[0005] Therefore, how to reduce experimental errors caused by manual operation has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this invention aims to provide an automated dripping device suitable for Abel stability testing, reducing test errors caused by manual operation and realizing an automated dripping process for potassium iodide starch solution.

[0007] To achieve the above objectives, the technical solution of this utility model is: an automated dripping device suitable for Abel stability testing, comprising:

[0008] Workbench;

[0009] The gripping mechanism and the dispensing mechanism are mounted on the workbench. The gripping mechanism includes a clamping assembly for releasably gripping a test strip holder. The lower end of the test strip holder is used to connect potassium iodide starch test strips. The dispensing mechanism includes a pipetting air pump for drawing up the liquid and adding the liquid onto the potassium iodide starch test strips.

[0010] A monitoring unit for identifying the dispensing process of the pipetting air pump and the potassium iodide starch test paper; and

[0011] A control unit electrically connected to the clamping assembly, the pipetting air pump, and the monitoring unit.

[0012] Furthermore, the clamping assembly is an electric gripper, which includes a base and two grippers slidably connected below the base and arranged symmetrically at the center. The two grippers can rotate along their central axis of symmetry and can move closer to or further away from each other.

[0013] Furthermore, the gripping mechanism also includes a lifting assembly for adjusting the height of the base, the lifting assembly comprising:

[0014] A connecting frame 1 is fixedly connected to the base;

[0015] A sliding frame connected to the worktable, the sliding frame having a vertically arranged slide rail, a connecting frame slidably connected to the slide rail, and two pulleys rotatably connected to the sliding frame, the two pulleys being located on the upper and lower sides of the slide rail respectively, the two pulleys being connected by a sleeved belt, a portion of the belt being fixedly connected to the connecting frame; and

[0016] A power component is drivenly connected to at least one of the pulleys, and the power component is electrically connected to the control unit.

[0017] Furthermore, the power component can be a servo motor or a stepper motor.

[0018] Furthermore, the dripping mechanism also includes:

[0019] A position adjustment component is installed on the top of the workbench;

[0020] Connecting frame two is attached below the position adjustment component;

[0021] A mounting bracket fixedly connected to the middle of the pipetting air pump, one end of which is hinged to the lower end of the second connecting frame; and

[0022] The fixed end is connected to the second connecting frame, and the movable end is connected to the other end of the mounting bracket. The power telescopic rod is electrically connected to the control unit.

[0023] Furthermore, the position adjustment component includes:

[0024] Two sets of connecting seats are fixedly connected to the top of the workbench. Each set of connecting seats has two seats, and the four connecting seats are arranged in a rectangular array. Each connecting seat is rotatably connected to a pulley two, and the two pulley two on each set of connecting seats are connected by a belt two for transmission.

[0025] A dual-head drive motor is fixedly connected to the workbench and located between the two connecting seats. The dual-head drive motor is electrically connected to the control unit, and the transmission shafts at both ends are respectively connected to one of the pulleys on each of the connecting seats.

[0026] There is a slide rail three between each pair of connecting seats. The slide rail three is fixedly connected to the top of the workbench and is perpendicular to the belt two.

[0027] A sliding frame two is vertically fixedly connected to the lower surfaces of the two pulleys two respectively. Both ends of the sliding frame two are slidably connected to the two slide rails three respectively. The sliding frame two has slide rails two along its length. The connecting frame two is slidably connected to the slide rails two. Two pulleys three are rotatably connected to the sliding frame two. The two pulleys three are located on both sides of the slide rails two respectively. The two pulleys three are connected by a sleeved belt three. A portion of the pulleys three is fixedly connected to the connecting frame two.

[0028] A power component two is drivenly connected to at least one of the pulleys two, and the power component two is electrically connected to the control unit.

[0029] Furthermore, the power telescopic rod is an electric push rod, and the second power component is a servo motor or a stepper motor.

[0030] Furthermore, the monitoring unit is a camera installed on the workbench, and the control unit is an industrial control computer.

[0031] Furthermore, the test strip holder includes:

[0032] A rubber stopper detachably connected to the test tube opening; two grippers releasably gripping the test strip holder; and

[0033] A glass rod, the lower section of which is fixedly inserted through the rubber stopper and connected to the potassium iodide starch test paper.

[0034] Furthermore, it also includes a solution bottle disposed on the workbench, the solution bottle being used to hold the droplets, and the pipetting air pump selectively drawing the droplets from the solution bottle.

[0035] Compared with the prior art, this utility model has at least the following advantages:

[0036] To optimize the experimental process, a vision system was introduced to assist the motion components of the dispensing mechanism in precisely adjusting the position of the potassium iodide starch test paper. Through automated control, the dispensing outlet of the mechanism was precisely moved to the preset position on the potassium iodide starch test paper, thereby achieving automated dispensing operation. This effectively improves experimental efficiency and accuracy, reduces errors and uncertainties caused by manual operation, and provides a reliable guarantee for the standardized and precise implementation of Abel stability testing. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the overall structure of the automated dripping device for Abel stability testing according to this utility model;

[0039] Figure 2 This is a schematic diagram of the assembly of the gripping mechanism and the dripping mechanism of this utility model;

[0040] Figure 3 This is a schematic diagram of the overall structure of the dripping mechanism of this utility model;

[0041] Figure 4 This is a schematic diagram of the overall structure of the dripping mechanism of this utility model from another perspective;

[0042] Figure 5 This is a schematic diagram of the assembly of the test paper holder and potassium iodide starch test paper of this utility model.

[0043] Reference numerals: 1. Workbench; 2. Gripping mechanism; 3. Dropping mechanism; 4. Test paper holder; 5. Potassium iodide starch test paper; 6. Monitoring unit; 21. Base; 22. Gripper; 23. Connecting frame one; 24. Sliding frame one; 25. Slide rail one; 26. Pulley one; 27. Belt one; 28. Power component one; 31. Pipetting air pump; 32. Connecting frame two; 33. Mounting bracket; 34. Power telescopic rod; 35. Connecting seat; 36. Pulley two; 37. Belt two; 38. Dual-head drive motor; 39. Slide rail three; 310. Sliding frame two; 311. Power component two; 312. Pulley three; 313. Belt three; 41. Rubber stopper; 42. Glass rod. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Reference Figure 1-2 This invention provides an automated dispensing device suitable for Abel stability testing, aiming to reduce testing errors caused by manual operation and achieve automated dispensing of potassium iodide starch solution.

[0047] Its specific structure includes a workbench 1, a gripping mechanism 2, a dispensing mechanism 3, a monitoring unit 6, and a control unit (not shown in the figure). The workbench 1 has a frame structure and serves as the supporting part of the entire device. The gripping mechanism 2, mounted on the workbench 1, includes a clamping assembly that releasably grips the test strip holder 4. The lower end of the test strip holder 4 is used to connect potassium iodide starch test strips 5. The dispensing mechanism 3, also mounted on the workbench 1, includes a pipetting air pump 31. The pipetting air pump 31 contains a plunger driven by a stepper motor and a lead screw nut, and integrates an encoder for closed-loop control, enabling accurate quantitative aspiration of solution. Its pipette tip is retractable. The ADP1000 type pipetting air pump 31 manufactured by Shenzhen Daken Technology Co., Ltd. is preferred; this is existing technology and will not be described in detail. The pipetting air pump 31 is used to aspirate and dispense the solution onto the potassium iodide starch test strips 5. The monitoring unit 6 is used to identify the dripping process of the pipetting air pump 31 and the potassium iodide starch test paper 5. In a preferred embodiment of this invention, the monitoring unit 6 is a camera mounted on the workbench 1. The control unit is electrically connected to the clamping assembly, the pipetting air pump 31, and the monitoring unit 6. In a preferred embodiment, the control unit is an industrial computer.

[0048] It should be noted that this utility model can use an external power supply or a battery or other power device to power the control unit, clamping assembly, pipetting air pump 31 and monitoring unit 6 and other components.

[0049] During use, the monitoring unit 6 monitors the dripping process in real time and provides feedback to the control unit. First, the potassium iodide starch test paper 5 is manually installed on the test paper holder 4; then, the control unit controls the clamping assembly to fix the test paper holder 4, and the pipetting air pump 31 draws up the dripping liquid, followed by aiming the pipette tip at the potassium iodide starch test paper 5 to drip the liquid. The dripping process is highly automated, reducing the probability of human error and improving work efficiency and the accuracy of test results.

[0050] The clamping assembly is an electric gripper, which can adopt existing technology. In this utility model, the clamping assembly includes a base 21 and two grippers 22. The grippers 22 are slidably connected below the base 21, centrally symmetrically distributed, and can rotate along the axis of symmetry, moving closer or further apart. When rotating, they can drive the test paper holder 4 to rotate synchronously, so that the potassium iodide starch test paper 5 is better positioned facing the pipetting air pump 31 tip. The base 21 is equipped with a servo motor or stepper motor or other drive structure, which can precisely control the spacing and rotation angle of the grippers 22. This is existing technology and will not be described in detail.

[0051] Reference Figure 3-4 The gripping mechanism 2 also includes a lifting assembly for adjusting the height of the base 21, comprising a connecting frame 23, a sliding frame 24, and a power component 28. The connecting frame 23 is fixed to the base 21. The sliding frame 24 is connected to the worktable 1 and has a vertical slide rail 25, which is slidably connected to the connecting frame 23. Two pulleys 26 are rotatably connected to the sliding frame 24, located on the upper and lower sides of the slide rail 25 respectively. The two pulleys 26 are connected by a sleeved belt 27, part of which is fixed to the connecting frame 23. The power component 28 is connected to at least one pulley 26 and electrically connected to the control unit; it can be a servo motor or a stepper motor. The power component 28 drives the pulleys 26 to rotate, thereby raising and lowering the base 21.

[0052] The dripping mechanism 3 of this utility model also includes a position adjustment component, a second connecting frame 32, a mounting bracket 33, and a power telescopic rod 34. The position adjustment component is located on the top of the worktable 1 and is used to adjust the position of the pipetting air pump 31 to realize the liquid aspiration and dripping process. The second connecting frame 32 is connected below the position adjustment component, and the mounting bracket 33 is fixed in the middle of the pipetting air pump 31. Both are U-shaped and clamped around the periphery of the pipetting air pump 31. One end of the mounting bracket 33 is hinged to the lower end of the second connecting frame 32. The power telescopic rod 34 is an electric push rod. The fixed end is connected to the second connecting frame 32, and the movable end is connected to the other end of the mounting bracket 33 and is electrically connected to the control unit.

[0053] In addition, this utility model is equipped with a solvent bottle with its opening facing upwards, placed on the workbench 1, for holding a drop of liquid, which is an aqueous solution of glycerol. The pipetting air pump 31 can selectively draw the drop from it.

[0054] The control unit controls the extension and retraction of the power telescopic rod 34, changing the tilt angle of the pipetting air pump 31. When vertical, it is convenient to pick up the droplets, and when tilted, it can realize the dripping process.

[0055] Preferably, the position adjustment assembly includes a connecting seat 35, a second pulley 36, a second belt 37, and a dual-head drive motor 38. Two sets of connecting seats 35 are provided, with two connecting seats 35 in each set, fixed to the top of the worktable 1 and arranged in a rectangular array. The second pulleys 36 are rotatably connected to the connecting seats 35, and the two pulleys 36 in each set are connected by a second belt 37. The dual-head drive motor 38 is fixed to the worktable 1 and located between the two connecting seats 35, electrically connected to the control unit, and its two drive shafts are respectively connected to one of the second pulleys 36 in each set. A slide rail 39, fixed to the top of the worktable 1 and perpendicular to the second belt 37, is provided between the two connecting seats 35 in each set.

[0056] In addition, the position adjustment assembly also includes a sliding frame 310, pulleys 312, belts 313, and a power component 311. The sliding frame 310 is vertically fixed to the lower surfaces of the two pulleys 36 and slidably connected to the two slide rails 39. The sliding frame 310 has slide rails 39 along its length and is slidably connected to the connecting frame 32. The two pulleys 312 are rotatably connected to the sliding frame 310 and are located on both sides of the slide rails 39. They are connected by a belt 313. Part of the pulleys 312 are fixed to the connecting frame 32. The power component 311 is connected to at least one pulley 36 and is electrically connected to the control unit. It is preferably a servo motor or a stepper motor.

[0057] The control unit controls the dual-head drive motor 38 to rotate, driving the pipetting air pump 31 to move along the length direction of the second pulley 36; it controls the power component 311 to rotate, driving the pipetting air pump 31 to move along the direction of the third pulley 312, thereby realizing the position change of the pipetting air pump 31 when aspirating solution and dripping liquid.

[0058] Reference Figure 4 The test paper holder 4 includes a rubber stopper 41 and a glass rod 42. The rubber stopper 41 is in the shape of an inverted truncated cone and is detachably connected to the mouth of the test tube. Two grippers 22 can release and hold the rubber stopper 41. The lower section of the glass rod 42 is fixedly inserted through the rubber stopper 41 and is provided with a hook. The hook passes through the potassium iodide starch test paper 5 to fix the potassium iodide starch test paper 5.

[0059] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0060] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An automated droplet device suitable for Abbe stability testing, characterized in that, The utility model relates to a kind of test paper automatic dispensing device, including: Workbench (1); Grabbing mechanism (2) and drop mechanism (3) are installed on the workbench (1), the grabbing mechanism (2) includes clamping assembly, for the test paper frame (4) is clamped in releasable way, the lower end of the test paper frame (4) is used to connect potassium iodide starch test paper (5), the drop mechanism (3) includes pipetting air pump (31), the pipetting air pump (31) is used to suck drop and drop the drop on potassium iodide starch test paper (5); Monitoring unit (6) for identifying the pipetting air pump (31) and potassium iodide starch test paper (5) drop process; And Control unit is electrically connected with the clamping assembly, pipetting air pump (31) and monitoring unit (6).

2. The automated droplet apparatus suitable for the Abelian stability test of claim 1, wherein, The clamping assembly is electrically operated jaw, and the clamping assembly includes base (21) and two jaws (22) symmetrically arranged in the center below the base (21), the two jaws (22) can rotate along the central symmetry axis and can approach or move away from each other.

3. The automated droplet apparatus suitable for the Abelian stability test of claim 2, wherein, The grabbing mechanism (2) further includes a lifting assembly for adjusting the height of the base (21), the lifting assembly includes: Connecting frame one (23) is fixedly connected with the base (21); Sliding frame one (24) is connected with the workbench (1), and sliding rail one (25) is arranged in the vertical direction of the sliding frame one (24), the connecting frame one (23) is slidably connected with the sliding rail one (25), two belt pulleys one (26) are rotatably connected on the sliding frame one (24), the two belt pulleys one (26) are respectively located on the upper and lower sides of the sliding rail one (25), and the two belt pulleys one (26) are drivingly connected by sleeved belt one (27), and part of the belt one (27) is fixedly connected with the connecting frame one (23);And Power member one (28) is drivingly connected with at least one of the belt pulleys one (26), and the power member one (28) is electrically connected with the control unit.

4. The automated droplet apparatus suitable for the Abelian stability test of claim 3, wherein, The power member one (28) is selected from servo motor or stepper motor.

5. The automated droplet apparatus for the Abelian stability test of claim 1, wherein, The drop mechanism (3) further includes: Position adjusting assembly is arranged at the top of the workbench (1); Connecting frame two (32) is connected below the position adjusting assembly; Mounting bracket (33) is fixedly connected in the middle of the pipetting air pump (31), one end of the mounting bracket (33) is hingedly connected with the lower end of the connecting frame two (32);And Power telescopic rod (34) is connected with the other end of the mounting bracket (33) at the fixed end and the connecting frame two (32), and the power telescopic rod (34) is electrically connected with the control unit.

6. The automated droplet apparatus suitable for the Abelian stability test of claim 5, wherein, The position adjusting assembly includes: Two groups of connecting seats (35) are fixedly connected at the top of the workbench (1), the number of each group of connecting seats (35) is two, four connecting seats (35) are distributed in rectangular array, belt pulley two (36) is rotatably connected on the connecting seat (35) one by one, and two belt pulleys two (36) on each group of connecting seats (35) are drivingly connected by belt two (37). A double-head driving motor (38) is fixedly connected between the workbench (1) and the two connecting seats (35), the double-head driving motor (38) is electrically connected with the control unit, and the transmission shafts at both ends are respectively in transmission connection with one of the belt pulleys two (36) on each group of the connecting seats (35); A slide rail three (39) is arranged between each group of the two connecting seats (35), the slide rail three (39) is fixedly connected with the top of the workbench (1) and is perpendicular to the belt two (37); A sliding frame two (310) is fixedly connected with the lower surface of the two belt pulleys two (36) respectively, both ends of the sliding frame two (310) are respectively in sliding connection with the two slide rail threes (39), the sliding frame two (310) is provided with a slide rail two along the length direction, the connecting frame two (32) is in sliding connection with the slide rail two, the sliding frame two (310) is rotatably connected with two belt pulley threes (312), the two belt pulley threes (312) are located on the two sides of the slide rail two respectively, the two belt pulley threes (312) are in transmission connection through a sleeved belt three (313), and part of the belt pulley threes (312) are fixedly connected with the connecting frame two (32); and A power member two (311) is in transmission connection with at least one of the belt pulleys two (36), the power member two (311) is electrically connected with the control unit.

7. The automated droplet apparatus suitable for the Abelian stability test of claim 6, wherein, The power telescopic rod (34) is an electric push rod, and the power member two (311) is a servo motor or a stepping motor.

8. The automated droplet apparatus for the Abelian stability test of claim 1, wherein, The monitoring unit (6) is a camera installed on the workbench (1), and the control unit is an industrial computer.

9. The automated droplet apparatus suitable for the Abelian stability test of claim 2, wherein, The test paper rack (4) comprises: A rubber plug (41) is detachably connected with the test tube port, and the two clamping jaws (22) clamp the test paper rack (4) in a releasable manner; and A glass rod (42) is fixedly penetrated through the rubber plug (41) and connected with the potassium iodide starch test paper (5).

10. The automated droplet apparatus suitable for the Abelian stability test according to any one of claims 1 to 9, characterized in that, A solution bottle is further arranged on the workbench (1), the solution bottle is used for containing the drop, and the pipette air pump (31) selectively sucks the drop from the solution bottle.

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