Nitrogen blowing device compatible with dual-mode air blowing and batch independent constant volume

Abstract

The invention relates to the technical field of laboratory equipment, in particular to a nitrogen blowing device compatible with dual-mode air blowing and batch independent constant volume. Through innovative designs such as the replaceable automatic nitrogen blowing concentrator and the corresponding blowing needle thereof, the 8 * 4 arranged 32-bit infrared optical constant volume module and the like, the functions of free switching between a long needle direct blowing mode and a short needle inclined blowing mode on the same equipment, independent automatic constant volume of each channel and the like are realized; the application range and the batch processing capability of the equipment are obviously improved, and a more flexible and efficient sample concentration solution is provided for a laboratory.

Description

Technical Field

[0001] The invention relates to the technical field of laboratory equipment, and in particular to a nitrogen blowing device compatible with dual-mode blowing and batch independent volume setting. Background Art

[0002] As a commonly used sample pretreatment equipment, nitrogen concentrator is widely used in many fields such as chemistry, biology, medicine, and food. It accelerates the evaporation of the solvent in the sample by blowing a nitrogen flow into the sample container, thereby concentrating the sample. With the improvement of laboratory automation, the automatic nitrogen concentrator has gradually replaced the traditional manual nitrogen blowing method due to its high efficiency and convenience, and has become one of the indispensable equipment in the laboratory.

[0003] Existing automatic nitrogen blowing concentrators usually use two main nitrogen blowing modes: long needle direct blowing and short needle oblique blowing. In the long needle direct blowing mode, nitrogen directly blows the center of the sample liquid surface, which is suitable for the concentration of small volume samples; in the short needle oblique blowing mode, nitrogen blows to the inner wall of the sample concentrator tube to form a vortex effect, which is suitable for the concentration of large volume samples. However, most automatic nitrogen blowing concentrators can only choose one of the modes for the blowing device design on the same device, and cannot realize the free switching of the two nitrogen blowing modes on the same device, which limits its scope of application.

[0004] In order to further improve the degree of automation, some automatic nitrogen blowing concentrators are equipped with an automatic volume setting function. The optical sensor detects the sample liquid level to achieve automatic concentration of the sample solution to a specified volume to avoid over-concentration. This function improves the accuracy and efficiency of the experiment, but it also has some limitations. For example, nitrogen blowing concentrators with automatic volume setting function usually have fewer digits, usually no more than 30 digits, which makes it difficult to meet the needs of large-scale sample processing. Automatic nitrogen blowing concentrators with more digits usually do not have an automatic volume setting function, which requires users to purchase multiple devices to meet different experimental needs.

[0005] The automatic nitrogen blowing concentrators in the prior art have the following shortcomings: (1) Single nitrogen blowing mode: Most devices can only select one mode of long needle straight blowing or short needle oblique blowing, and cannot realize free switching between the two modes on the same device, which limits its scope of application. (2) Limited batch processing capacity: Devices with automatic volume setting function usually have fewer bits and cannot meet the needs of large-scale sample processing. (3) High equipment cost: In order to realize dual nitrogen blowing mode and batch independent volume setting function, users often need to purchase multiple devices, which increases experimental costs and space occupancy. Summary of the invention

[0006] The present invention proposes a nitrogen blowing device compatible with dual-mode blowing and independent batch volume setting, aiming to solve the problems existing in the prior art and provide a more flexible and efficient sample concentration solution.

[0007] The technical solution adopted by the present invention is: a nitrogen blowing device compatible with dual-mode blowing and batch independent volume setting, including a body, a water bath box is provided at the lower part of the body, a nitrogen blowing box is hinged on the body above the water bath box, a plurality of sample bottles are installed in the water bath box through a sample rack, and an infrared sensor is installed at the bottom of the water bath box below the sample bottle, a frame is provided in the nitrogen blowing box, an upper fixed plate and a lower cross plate are fixedly connected to the inner wall of the nitrogen blowing box, a motor is fixedly connected to the bottom of the upper fixed plate, and the output shaft of the motor passes through the upper fixed plate and is fixedly connected There is a first transmission wheel, and a screw rod is rotatably connected to the upper fixed plate located on one side of the motor, and a second transmission wheel is fixedly sleeved on the upper end of the screw rod, and the first transmission wheel and the second transmission wheel are connected by a transmission belt, and a sliding plate is threadedly connected to the screw rod, and right-angle plates are fixedly connected to both ends of the sliding plate, and tripods are fixedly connected to the upper ends of the two right-angle plates, and movable plates located inside the frame are fixedly connected to the bottoms of the two tripods, and multiple automatic nitrogen blowing concentrators are installed at the bottom of the movable plate, and blowing needles are installed at the bottoms of the multiple automatic nitrogen blowing concentrators.

[0008] As a further improvement of the present invention, the top end of the nitrogen blowing box is hinged to the machine body through a hinge, and a handle is fixedly connected to the front side of the nitrogen blowing box.

[0009] As a further improvement of the present invention, a connecting seat is fixedly connected to one side of the body, a connecting support rod is hinged on the connecting seat, and a display is hinged to one end of the connecting support rod away from the connecting seat through a rotating shaft seat.

[0010] As a further improvement of the present invention, the upper fixed plate and the lower horizontal plate are fixedly connected via two guide rods penetrating through the sliding plate, and the sliding plate is slidably connected to the guide rods.

[0011] As a further improvement of the present invention, the screw rod is rotatably connected to the machine body, the upper fixed plate, and the lower cross plate respectively through a plurality of bearings.

[0012] As a further improvement of the present invention, the rear side of the water bath box is connected to a drainage pipe extending to the outside of the body.

[0013] As a further improvement of the present invention, the blowing needles are divided into long straight needles and short oblique needles, and the bottom of the automatic nitrogen blowing concentrator is equipped with blowing needles of the same type.

[0014] As a further improvement of the present invention, the number of the sample bottles is 32 and they are arranged in an 8×4 rectangular pattern. Eight blowing needles are installed at the bottom of each of the automatic nitrogen blowing concentrators and the blowing needles are evenly distributed above the sample bottles.

[0015] The beneficial effects of the present invention are as follows: the present invention realizes free switching between long needle straight blowing and short needle oblique blowing modes on the same device through a replaceable automatic nitrogen blowing concentrator and its corresponding blowing needle, simplifies the operation process, and significantly improves the application scope of the equipment, which can meet the concentration requirements of samples of different volumes. Users only need simple training to change the blowing mode by themselves, and there is no need for professional after-sales engineers to provide door-to-door service, which saves time and cost.

[0016] The present invention adopts a 32-bit infrared optical volume determination module with an 8×4 arrangement. Each sample channel is equipped with an independent infrared sensor, which can realize independent automatic volume determination for each channel, solving the problem of small number of sample bits in traditional equipment. It also ensures that each sample channel is not affected by other samples during the concentration process and can be accurately concentrated to a preset volume determination end point. Compared with the prior art, the batch processing capacity of the present invention is greatly improved, and more samples can be processed at the same time, which is particularly suitable for laboratory environments that require large-scale processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a nitrogen blowing device compatible with dual-mode blowing and batch independent volume setting of the present invention;

[0018] Figure 2 The present invention is a nitrogen blowing device compatible with dual-mode blowing and batch independent volume setting. Figure 1 Schematic diagram from another perspective;

[0019] Figure 3 This is a diagram of the nitrogen blowing box opening state of a nitrogen blowing device compatible with dual-mode blowing and batch independent volume setting of the present invention;

[0020] Figure 4 The present invention is a nitrogen blowing device compatible with dual-mode blowing and batch independent volume setting. Figure 3 Schematic diagram from another perspective;

[0021] Figure 5 It is a schematic diagram of the internal structure of a nitrogen blowing box of a nitrogen blowing device compatible with dual-mode blowing and batch independent volume setting of the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of a water bath box of a nitrogen blowing device compatible with dual-mode blowing and independent batch constant volume according to the present invention;

[0023] Figure 7 It is a schematic diagram of the internal structure of a water bath box of a nitrogen blowing device compatible with dual-mode blowing and batch independent constant volume according to the present invention;

[0024] Figure 8 It is a partial structural schematic diagram of a nitrogen blowing device compatible with dual-mode blowing and batch independent volume setting of the present invention;

[0025] Fig. 9 The present invention is a nitrogen blowing device compatible with dual-mode blowing and batch independent volume setting. Figure 8 Schematic diagram from another perspective;

[0026] Fig.10 The present invention is a nitrogen blowing device compatible with dual-mode blowing and batch independent volume setting. Fig. 9 Schematic diagram from another perspective.

[0027] As shown in the figure: 1. Machine body; 2. Water bath box; 3. Nitrogen blowing box; 4. Sample rack; 5. Sample bottle; 6. Frame; 7. Upper fixed plate; 8. Lower horizontal plate; 9. Motor; 10. First transmission wheel; 11. Screw rod; 12. Second transmission wheel; 13. Transmission belt; 14. Sliding plate; 15. Right-angle plate; 16. Tripod; 17. Movable plate; 18. Automatic nitrogen blowing concentrator; 19. Blowing needle; 20. Hinge; 21. Handle; 22. Connecting seat; 23. Connecting support rod; 24. Rotating shaft seat; 25. Display; 26. Guide rod; 27. Bearing; 28. Drain pipe. DETAILED DESCRIPTION

[0028] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may change accordingly according to their different locations and different usage states; therefore, these or other directional terms should not be interpreted as restrictive terms.

[0029] The singular forms "a", "said" and "the" used in this specification are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and implementation methods. It should be understood that the implementation methods described herein are only used to explain this application and are not used to limit this application.

[0031] The present invention provides the following Figure 1-10A nitrogen blowing device compatible with dual-mode blowing and batch independent volume setting is shown, comprising a body (1), a water bath box (2) is provided at the lower part of the body (1), a nitrogen blowing box (3) is hingedly connected to the body (1) above the water bath box (2), a plurality of sample bottles (5) are installed in the water bath box (2) through a sample rack (4), and an infrared sensor is installed at the bottom of the water bath box (2) below the sample bottles (5), a frame (6) is provided in the nitrogen blowing box (3), an upper fixed plate (7) and a lower cross plate (8) are fixedly connected to the inner wall of the nitrogen blowing box (3), a motor (9) is fixedly connected to the bottom of the upper fixed plate (7), an output shaft of the motor (9) passes through the upper fixed plate (7) and is fixedly connected to a first transmission wheel (10), and the upper fixed plate (7) is rotatably connected to a screw rod (11) located on one side of the motor (9), the upper end of the screw rod (11) is fixedly sleeved with a second transmission wheel (12), the first transmission wheel (10) and the second transmission wheel (12) are connected via a transmission belt (13), a sliding plate (14) is threadedly connected to the screw rod (11), both ends of the sliding plate (14) are fixedly connected to right-angle plates (15), the upper ends of the two right-angle plates (15) are fixedly connected to tripods (16), the bottoms of the two tripods (16) are fixedly connected to a movable plate (17) located inside the frame (6), a plurality of automatic nitrogen blowing concentrators (18) are installed at the bottom of the movable plate (17), and a plurality of blowing needles (19) are installed at the bottom of the plurality of automatic nitrogen blowing concentrators (18).

[0032] like Figure 2 , Figure 4 , Figure 5 As shown, the top of the nitrogen blowing box (3) in the present invention is hinged to the body (1) through a hinge (20), and the front side of the nitrogen blowing box (3) is fixedly connected with a handle (21) to facilitate opening the nitrogen blowing box 3. One side of the body (1) is fixedly connected with a connecting seat (22), and a connecting support rod (23) is hinged on the connecting seat (22). The connecting support rod (23) is hinged with a display (25) at one end away from the connecting seat (22) through a rotating shaft seat (24), so that the user can check the operating status and experimental parameters of the equipment at any time, thereby improving the convenience and accuracy of the experiment.

[0033] like Figure 8-10 As shown, the upper fixed plate (7) and the lower horizontal plate (8) in the present invention are fixedly connected by two guide rods (26) passing through the sliding plate (14), and the sliding plate (14) is slidably connected to the guide rods (26), thereby improving the stability of the movement of the sliding plate 14. The screw rod (11) is rotatably connected to the body (1), the upper fixed plate (7), and the lower horizontal plate (8) through a plurality of bearings (27), thereby improving the stability and durability of the device.

[0034] like Figure 2 and Figure 4As shown, the rear side of the water bath box (2) in the present invention is connected to a drainage pipe (28) extending to the outside of the machine body (1), the blowing needle (19) is divided into a long straight needle and a short oblique needle, and the bottom of the automatic nitrogen blowing concentrator (18) is installed with the same type of blowing needle (19), the number of the sample bottles (5) is 32 and they are arranged in an 8×4 rectangular pattern, and each of the automatic nitrogen blowing concentrators (18) is installed with 8 blowing needles (19) at the bottom, and the blowing needles (19) are evenly distributed above the sample bottles (5).

[0035] Working principle: In the specific implementation of the present invention, first, the samples to be concentrated are placed in sample bottles 5 respectively, and the sample bottles 5 are installed in the water bath box 2 through the sample rack 4. The infrared sensor in the water bath box 2 can detect the height of the sample liquid level in the sample bottle 5 in real time, ensuring that the sample can be evenly heated during the nitrogen blowing process, thereby accelerating the evaporation of the solvent.

[0036] Then, the user can select the appropriate nitrogen blowing mode according to the experimental requirements. The bottom of the automatic nitrogen blowing concentrator 18 of the present invention can be installed with two types of blowing needles 19, long straight needles or short oblique needles. The user only needs to simply replace the blowing needles 19 to realize the free switching between the long needle straight blowing and short needle oblique blowing modes on the same device. This design not only simplifies the operation process, but also significantly improves the scope of application of the equipment, and can meet the concentration needs of samples of different volumes.

[0037] After selecting a suitable nitrogen blowing mode, the user can set the experimental parameters, such as nitrogen flow rate, concentration time, etc., through the display 25. The display 25 is hinged to the body 1 through the connecting rod 23, so that the user can check the operating status and experimental parameters of the equipment at any time, thereby improving the convenience and accuracy of the experiment.

[0038] Subsequently, the motor 9 is started, and the output shaft of the motor 9 drives the first transmission wheel 10 to rotate, and transmits power to the second transmission wheel 12 through the transmission belt 13, thereby driving the screw rod 11 to rotate. The rotation of the screw rod 11 causes the sliding plate 14 threadedly connected thereto to move up and down under the constraint of the guide rod 26. The movement of the sliding plate 14 drives the right-angle plate 15, the tripod 16 and the movable plate 17 to move together, thereby adjusting the height of the automatic nitrogen blowing concentrator 18 to keep an appropriate distance from the sample liquid level in the sample bottle 5.

[0039] During the nitrogen blowing process, nitrogen is blown into the sample bottle 5 through the blowing needle 19 at the bottom of the automatic nitrogen blowing concentrator 18 to accelerate the evaporation of the solvent in the sample. At the same time, the infrared sensor monitors the height of the sample liquid level in real time. When the sample is concentrated to a preset volume, the nitrogen blowing process is automatically stopped to achieve automatic volume determination of the sample.

[0040] Finally, after the experiment is over, the user can drain the water in the water bath box 2 through the drain pipe 28 to facilitate the next experiment. At the same time, the nitrogen blow box 3 can be hinged to the body 1 through the hinge 20 to open, so that the user can clean and maintain the equipment conveniently.

[0041] In summary, the present invention proposes a nitrogen blowing device that is compatible with dual-mode blowing and independent batch volume setting. Through innovative designs such as a replaceable automatic nitrogen blowing concentrator and its corresponding blowing needles, an 8×4 arranged 32-bit infrared optical volume setting module, etc., free switching between long needle straight blowing and short needle oblique blowing modes, independent automatic volume setting of each channel and other functions are realized on the same device, which significantly improves the application scope and batch processing capacity of the equipment, and provides a more flexible and efficient sample concentration solution for the laboratory.

[0042] The above implementation modes are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the implementation modes of the present invention.

Claims

1. A nitrogen blowing device compatible with dual-mode blowing and batch independent volume control, comprising a body (1), characterized in that: A water bath box (2) is provided at the lower part of the machine body (1); a nitrogen blowing box (3) is hingedly connected to the machine body (1) above the water bath box (2); a plurality of sample bottles (5) are installed in the water bath box (2) via a sample rack (4); an infrared sensor is installed at the bottom of the water bath box (2) below the sample bottles (5); a frame (6) is provided in the nitrogen blowing box (3); an upper fixing plate (7) and a lower cross plate (8) are fixedly connected to the inner wall of the nitrogen blowing box (3); a motor (9) is fixedly connected to the bottom of the upper fixing plate (7); an output shaft of the motor (9) passes through the upper fixing plate (7) and is fixedly connected to a first transmission wheel (10); a first transmission wheel (10) is fixedly connected to the upper fixing plate (7) at one side of the motor (9); A screw rod (11) is provided, a second transmission wheel (12) is fixedly sleeved on the upper end of the screw rod (11), the first transmission wheel (10) and the second transmission wheel (12) are connected via a transmission belt (13), a sliding plate (14) is threadedly connected to the screw rod (11), both ends of the sliding plate (14) are fixedly connected to right-angle plates (15), the upper ends of the two right-angle plates (15) are fixedly connected to tripods (16), the bottoms of the two tripods (16) are fixedly connected to movable plates (17) located inside the frame (6), a plurality of automatic nitrogen blowing concentrators (18) are installed at the bottom of the movable plate (17), and a plurality of blowing needles (19) are installed at the bottom of the automatic nitrogen blowing concentrators (18).

2. A nitrogen blowing device compatible with dual-mode blowing and batch independent volume control according to claim 1, characterized in that: The top end of the nitrogen blowing box (3) is hinged to the machine body (1) via a hinge (20), and a handle (21) is fixedly connected to the front side of the nitrogen blowing box (3).

3. A nitrogen blowing device compatible with dual-mode blowing and independent batch constant volume according to claim 1, characterized in that: A connecting seat (22) is fixedly connected to one side of the machine body (1), a connecting support rod (23) is hingedly connected to the connecting seat (22), and a display (25) is hingedly connected to one end of the connecting support rod (23) away from the connecting seat (22) via a rotating shaft seat (24).

4. A nitrogen blowing device compatible with dual-mode blowing and batch independent volume control according to claim 1, characterized in that: The upper fixed plate (7) and the lower transverse plate (8) are fixedly connected via two guide rods (26) that penetrate through the sliding plate (14), and the sliding plate (14) and the guide rods (26) are slidably connected.

5. A nitrogen blowing device compatible with dual-mode blowing and batch independent volume control according to claim 1, characterized in that: The screw rod (11) is rotatably connected to the machine body (1), the upper fixed plate (7) and the lower transverse plate (8) respectively through a plurality of bearings (27).

6. A nitrogen blowing device compatible with dual-mode blowing and batch independent volume control according to claim 1, characterized in that: The rear side of the water bath box (2) is connected to a drainage pipe (28) extending to the outside of the machine body (1).

7. A nitrogen blowing device compatible with dual-mode blowing and independent batch constant volume according to claim 1, characterized in that: The blowing needle (19) is divided into a long straight needle and a short oblique needle, and the bottom of the automatic nitrogen blowing concentrator (18) is equipped with the same type of blowing needle (19).

8. A nitrogen blowing device compatible with dual-mode blowing and independent batch volume setting according to claim 7, characterized in that: The number of the sample bottles (5) is 32 and they are arranged in an 8×4 rectangular shape. Eight blowing needles (19) are installed at the bottom of each automatic nitrogen blowing concentrator (18) and the blowing needles (19) are evenly distributed above the sample bottles (5).

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