Double-station single-point constant volume device

Abstract

The utility model provides a double-station single-point constant volume device, belongs to the technical field of sample detection, and solves the problem that the existing manual titration method and volumetric method both have certain defects. The device comprises a bottom plate, an automatic shooting constant volume module is arranged on the bottom plate, the automatic shooting constant volume module comprises at least two constant volume tubes which are vertically arranged, indicating scales are arranged on the side walls of the constant volume tubes, the number of the constant volume tubes is at least two, the constant volume tubes are arranged in parallel, and a constant volume camera with a lens right facing the lower portions of the constant volume tubes is arranged on the bottom plate on one side of the constant volume tubes; and an automatic liquid adding module capable of dropwise adding a solution into the constant volume tube is also arranged on the bottom plate. The double-station single-point volume fixing device can simulate a manual titration method, automatic line marking and volume fixing are carried out, repeatability and volume fixing accuracy are met, and meanwhile potential health hazards caused by manual titration are avoided.

Description

Technical Field

[0001] This invention belongs to the field of solution preparation technology, specifically to a dual-station single-point volume control device. Background Technology

[0002] There are two traditional methods for making up to volume: one is manual titration, where the experimenter manually adds liquid and titrates; the other is the volumetric method. In manual titration, the liquid is first injected into the volumetric flask using a pipette. Then, when the liquid is 2-3 cm from the mark, a dropper is used, keeping the line of sight level with the lowest point of the concave meniscus, and titration continues until the lowest point of the concave meniscus reaches the graduation mark. The volumetric method, on the other hand, involves calculating the required volumes of solute and solvent separately, and then injecting them into the volumetric flask using a pipette to complete the volume adjustment.

[0003] However, manual titration requires visual inspection to ensure that the concave meniscus is level with the graduation mark on the volumetric flask. This method has a relatively large random error and is prone to over- or under-dropping, resulting in low accuracy and poor repeatability in volume determination. Furthermore, when the reagent is a toxic or harmful substance, manual titration can also affect the health of the experimenter.

[0004] The volumetric method is inaccurate because, due to the spaces between molecules, solute molecules or ions diffuse into the spaces between solvent molecules, and simply adding the volumes of solute and solvent cannot reach the volume mark. On the other hand, if the solvent is a volatile liquid, volatilization may occur during the titration process, which will also result in inaccurate volume determination. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a dual-station single-point volume determination device. This device can mimic the manual titration method to perform automatic volume determination by marking lines, satisfying repeatability and volume determination accuracy while avoiding the health hazards associated with manual titration.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A dual-station single-point volume-fixing device includes a base plate, on which an automatic shooting volume-fixing module is provided. The automatic shooting volume-fixing module includes a vertically arranged volume-fixing tube with an indicator scale on its side wall. There are at least two volume-fixing tubes arranged parallel to each other. A volume-fixing camera with a lens facing the lower part of the volume-fixing tube is provided on the base plate on one side of the volume-fixing tube. The base plate is also provided with an automatic liquid-adding module that can add solution to the volume-fixing tube.

[0008] As a further improvement of this utility model, the automatic shooting and volume determination module also includes a front light source and a rear light source disposed on the base plate for illuminating the volume determination tube, the front light source and the rear light source being disposed opposite to each other on both sides of the volume determination tube.

[0009] As a further improvement of the present utility model, the front light source and the volume determination camera are arranged on the same side, and the front light source is arranged in a "return" shape around the lens of the volume determination camera.

[0010] As a further improvement of the present utility model, the rear light source is fixedly installed on the edge of the bottom plate through a rear light source mounting bracket.

[0011] As a further improvement of the present utility model, a volume determination fixing plate for fixedly installing a volume determination tube is horizontally arranged above the bottom plate, and the volume determination fixing plate is connected to the bottom plate through vertically arranged mounting columns; the volume determination camera is fixedly installed on the bottom plate through a camera mounting bracket.

[0012] As a further improvement of the present utility model, the automatic liquid adding module includes a horizontal mounting plate arranged above the bottom plate. The horizontal mounting plate extends along the arrangement direction of the two volume determination tubes, and a translation slider capable of reciprocatingly moving along its extension direction is arranged on the upper surface of the horizontal mounting plate. A liquid adding head mounting plate extending in the same direction as the horizontal mounting plate is horizontally arranged on the top of the translation slider, and a liquid adding head is arranged on the upper plate surface of the liquid adding head mounting plate near one end of the volume determination tube. The liquid outlet end of the liquid adding head is arranged downward through the liquid adding head mounting plate, and a liquid path joint is further arranged on the liquid adding head.

[0013] As a further improvement of the present utility model, a lead screw arranged along the moving direction of the translation slider and in threaded cooperation with the translation slider is horizontally arranged above the horizontal mounting plate. Both ends of the lead screw are rotatably connected to a lead screw mounting plate fixedly arranged on the horizontal mounting plate; a guide rail arranged along the moving direction of the translation slider and in sliding cooperation with the lower surface of the translation slider is further arranged on the upper surface of the horizontal mounting plate.

[0014] As a further improvement of the present utility model, a limit switch is arranged on the plate surface of the lead screw mounting plate close to the volume determination tube, and a limit induction piece for inductively cooperating with the lower surface of the liquid adding head mounting plate is arranged on the upper part of the limit switch; a driving motor is arranged on the plate surface of the lead screw mounting plate far from the volume determination tube, and the power output end of the driving motor is in transmission connection with the end of the lead screw.

[0015] As a further improvement of the present utility model, the horizontal mounting plate is connected to the bottom plate through a mounting bracket, and a liquid adding cleaning tank connected to the mounting bracket through a cleaning tank mounting plate is arranged below the liquid adding head.

[0016] As a further improvement of the present utility model, a cable drag chain mounting plate extending in the same direction as the horizontal mounting plate is arranged on one side of the horizontal mounting plate, and a cable drag chain with one end connected to the translation slider is arranged on the cable drag chain mounting plate.

[0017] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are:

[0018] This device utilizes a volumetric camera to transmit the liquid level information in the volumetric tube to the automatic liquid addition module by capturing the real-time status of the volumetric tube. This allows the automatic liquid addition module to control the addition or cessation of liquid addition into the volumetric tube, thereby achieving the purpose of automatic equipment simulating manual titration for automatic volumetric determination.

[0019] Since the information collection and action execution of this device are completed by automated equipment, it has less random error compared to the traditional manual titration method. It is less likely to have too many or too few drops, and the accuracy and repeatability of volume determination are better. Furthermore, since it uses automated equipment instead of manual labor, it can also avoid the health risks associated with manual titration.

[0020] In addition, since the device simulates the manual titration method for automatic volume determination—it can add or stop adding liquid based on the actual liquid level information in the volume determination tube—it can overcome the shortcomings of the volume method and ensure the accuracy of volume determination compared to the volumetric method which pre-calculates the volume of solute and solvent. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of the present utility model;

[0023] Figure 2 This is a perspective view of the automatic liquid dispensing module in this utility model;

[0024] Figure 3 This is a three-dimensional view of the automatic volume-fixing module in this utility model.

[0025] Reference numerals: 1-Base plate; 11-Mounting bracket; 2-Liquid filling and cleaning tank; 21-Cleaning tank mounting plate; 3-Automatic liquid filling module; 31-Horizontal mounting plate; 311-Guide rail; 312-Screw mounting plate; 32-Screw; 33-Translation slider; 34-Liquid filling head mounting plate; 341-Liquid filling head; 342-Liquid circuit connector; 35-Drive motor; 36-Limit switch; 361-Limit sensor; 37-Cable drag chain; 371-Drag chain mounting plate; 4-Automatic shooting and volume determination module; 41-Volume determination tube; 411-Volume determination fixing plate; 412-Mounting support; 42-Volume determination camera; 421-Camera mounting bracket; 43-Front light source; 44-Rear light source; 441-Rear light source mounting bracket. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model.

[0029] The following is combined Figures 1-3 This utility model will be described in detail.

[0030] Example

[0031] A dual-station single-point volume-fixing device includes a horizontally arranged base plate 1, with multiple vertically mounted fixing columns on the lower surface of the base plate 1 for mounting the entire device. An automatic imaging volume-fixing module 4 is provided on the upper surface of the base plate 1. The automatic imaging volume-fixing module 4 includes vertically arranged volume-fixing tubes 41 with indicated scales on their sidewalls; there are at least two volume-fixing tubes 41 arranged parallel to each other. A volume-fixing camera 42 with a lens facing the lower part of the volume-fixing tube 41 is provided on one side of the base plate 1. An automatic liquid-adding module 3 for adding solution to the volume-fixing tubes 41 is also provided on the base plate 1. In this embodiment, a controller is also provided within the automatic liquid-adding module 3 to receive photographic information captured by the volume-fixing camera 42 and control the liquid addition.

[0032] Before the module is put into use, the liquid circuit of the automatic liquid adding module 3 needs to be connected to the liquid supply device in advance. When the volume-fixing tube 41 is placed in the placement position of the automatic volume-fixing module 4, the volume-fixing camera 42 starts to work: First, the volume-fixing camera 42 takes a picture of the liquid level in the volume-fixing tube 41, and the controller compares and judges the height of the scale line of the volume-fixing tube 41 with the liquid level; after the volume-fixing program in the controller determines the amount of liquid to be added, the automatic liquid adding module 3 can add solution to the volume-fixing tube 41 according to the program; after the liquid is added in sequence, the volume-fixing camera 42 takes a picture of the liquid level again, compares it with the position of the scale line of the volume-fixing tube 41, and judges whether the amount of liquid added is correct through the program. If liquid needs to be added again, the above actions are repeated; if the volume-fixing height has been reached, all the actions required by the module have been completed.

[0033] This device utilizes a volumetric camera 42 to transmit the liquid level information within the volumetric tube 41 to the automatic liquid addition module 3 by capturing real-time images of the tube. This allows the automatic liquid addition module 3 to add or stop adding liquid to the tube, thus achieving automatic volumetric calibration to simulate manual titration. Because the device's information collection and execution are both automated, it exhibits less random error compared to traditional manual titration, reducing the likelihood of over- or under-dropping and ensuring better accuracy and repeatability. Furthermore, by using automated equipment instead of manual labor, it avoids the health risks associated with manual titration. Additionally, since this device simulates manual titration—adding or stopping liquid based on the actual liquid level in the tube 41—it overcomes the limitations of volumetric methods that rely on pre-calculated solute and solvent volumes, ensuring accurate volumetric calibration.

[0034] like Figure 2 As shown, the automatic imaging and volume-fixing module 4 also includes a front light source 43 and a rear light source 44 mounted on the base plate 1 for illuminating the volume-fixing tube 41. The front light source 43 and the rear light source 44 are arranged opposite each other on both sides of the volume-fixing tube 41. In use, this device can provide sufficient working brightness for the volume-fixing camera 42 by illuminating the volume-fixing tube 41 through the front light source 43 and the rear light source 44. In this embodiment, the front light source 43 and the volume-fixing camera 42 are located on the same side, and the front light source 43 is arranged in a "U" shape around the lens of the volume-fixing camera 42. The rear light source 44 is fixedly mounted on the edge of the base plate 1 by a rear light source mounting bracket 441.

[0035] To accommodate the volume-fixing tube 41, a volume-fixing mounting plate 411 is horizontally positioned above the base plate 1 for fixing the tube 41. Specifically, there are two volume-fixing mounting plates 411, arranged parallel to each other vertically. The volume-fixing tube 41 passes vertically through the two volume-fixing mounting plates 411 and is fixedly mounted thereon. Meanwhile, the volume-fixing mounting plate 411 itself is connected to the base plate 1 via a vertically positioned mounting support 412. The volume-fixing camera 42 is fixedly mounted on the base plate 1 via a camera mounting bracket 421.

[0036] In this embodiment, the volume-fixing camera 42, the lower part of the volume-fixing tube 41, the front light source 43, and the rear light source 44 are all enclosed within the volume-fixing module housing.

[0037] like Figure 3 As shown, the automatic liquid dispensing module 3 includes a horizontal mounting plate 31 positioned above the base plate 1, extending along the arrangement direction of the two volumetric tubes 41. The upper surface of the horizontal mounting plate 31 is equipped with a translation slider 33 capable of reciprocating along its extension direction. A dispensing head mounting plate 34, extending horizontally in the same direction as the horizontal mounting plate 31, is positioned at the top of the translation slider 33, and a dispensing head 341 is positioned on the upper surface of the dispensing head mounting plate 34 near one end of the volumetric tube 41. The outlet end of the dispensing head 341 extends downward through the dispensing head mounting plate 34, and a liquid connector 342 is also provided on the dispensing head 341. By sliding the translation slider 33, the dispensing head 341 moves above the volumetric tube 41, where liquid enters through the liquid connector 342, and the dispensing head 341 drips liquid, ultimately achieving the process of titrating into the volumetric tube 41.

[0038] To drive the translation slider 33, a lead screw 32 is horizontally mounted above the horizontal mounting plate 31, arranged along the moving direction of the translation slider 33 and threadedly engaged with it. Both ends of the lead screw 32 are rotatably connected to a lead screw mounting plate 312 fixed on the horizontal mounting plate 31 via rotary bearings. The upper surface of the horizontal mounting plate 31 is also provided with a guide rail 311, arranged along the moving direction of the translation slider 33 and slidably engaged with the lower surface of the translation slider 33. Through the sliding engagement between the translation slider 33 and the guide rail 311, the movement of the translation slider 33 can be guided.

[0039] In this embodiment, a limit switch 36 is provided on the surface of the screw mounting plate 312 located near the volume-regulating tube 41. A limit sensing piece 361 is provided on the upper part of the limit switch 36, which senses and engages with the lower surface of the liquid filling head mounting plate 34. Through the limit switch 36 and its limit sensing piece 361, the movement information of the liquid filling head mounting plate 34 can be transmitted to the controller in a timely manner, thereby controlling the movement distance of the liquid filling head mounting plate 34. Meanwhile, a drive motor 35 is provided on the surface of the screw mounting plate 312 located away from the volume-regulating tube 41. The power output end of the drive motor 35 is connected to the end of the screw 32. In use, the drive motor 35 operates, driving the screw 32 to rotate, thereby driving the translation slider 33.

[0040] Furthermore, the horizontal mounting plate 31 is connected to the base plate 1 via a mounting bracket 11, and a liquid filling and cleaning tank 2 is provided below the liquid filling head 341, which is movably engaged with the mounting bracket 11 via a cleaning tank mounting plate 21. In order to clean the liquid filling head 341, a lifting cylinder is also provided at the bottom of the liquid filling and cleaning tank 2. Driven by the lifting cylinder, the liquid filling and cleaning tank 2 can be moved closer to / away from the liquid filling head 341, thereby achieving water washing and cleaning of the liquid filling head 341.

[0041] In addition, in this embodiment, a cable chain mounting plate 371 extending in the same direction as the horizontal mounting plate 31 is provided on one side, and a cable chain 37 with one end connected to the translation slider 33 is provided on the cable chain mounting plate 371.

[0042] It should be noted that the horizontal mounting plate 31, lead screw 32, translation slider 33, liquid filling head mounting plate 34, drive motor 35, and cable drag chain 37 are all enclosed within the liquid filling module housing.

[0043] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-station single-point volume control device, comprising a base plate (1), characterized in that, An automatic photographing and constant volume module (4) is provided on the bottom plate (1). The automatic photographing and constant volume module (4) includes a constant volume tube (41) vertically arranged with indicating scales on its side wall. There are at least two constant volume tubes (41) arranged in parallel with each other. On the bottom plate (1) on one side of the constant volume tube (41), there is a constant volume camera (42) with its lens facing the lower part of the constant volume tube (41); an automatic liquid adding module (3) capable of dripping a solution into the constant volume tube (41) is also provided on the bottom plate (1).

2. The dual-station single-point volume control device according to claim 1, characterized in that, The automatic photographing and constant volume module (4) further includes a front light source (43) and a rear light source (44) provided on the bottom plate (1) for irradiating the constant volume tube (41). The front light source (43) and the rear light source ( 3. The dual-station single-point volume control device according to claim 2, characterized in that, ​ 4. A dual-station single-point volume control device according to claim 2 or 3, characterized in that, ​ 5. A dual-station single-point volume control device according to claim 1, characterized in that, ​ 6. A dual-station single-point volume control device according to claim 1, characterized in that, ​ 7. A dual-station single-point volume control device according to claim 6, characterized in that, ​ 8. A dual-station single-point volume control device according to claim 7, characterized in that, ​ 9. A dual-station single-point volume control device according to claim 6, characterized in that, The horizontal mounting plate (31) is connected to the base plate (1) by a mounting bracket (11), and a liquid filling and cleaning tank (2) is provided below the liquid filling head (341) and connected to the mounting bracket (11) by a cleaning tank mounting plate (21).

10. A dual-station single-point volume control device according to claim 6, characterized in that, The horizontal mounting plate (31) has a cable chain mounting plate (371) extending in the same direction on one side, and the cable chain mounting plate (371) has a cable chain (37) connected to the translation slider (33) at one end.

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