Pneumatic micro-flow control spraying cover

Abstract

The utility model discloses a pneumatic micro-flow control spraying cover, and relates to the technical field of biomedicine. According to the pneumatic micro-flow control spraying cover, by arranging the structures such as the threaded sleeve, the connecting block, the sector gear, the first connecting rod, the second connecting rod and the third connecting rod, the protective cover is fixed above the spraying head, so that the spraying head is completely wrapped in a closed space, and by combining the quick response characteristic of an air pressure driving sprayer, uniform micro-droplets can be generated; solution splashing can be thoroughly avoided, the risk of cross contamination is remarkably reduced, and the method is particularly suitable for sterile operation or toxic reagent treatment; and rotation of a rotating shaft is limited through a first limiting plate and a second limiting plate, the situation that the rotating shaft drives a third connecting rod to rotate in the using process, connection between a clamping plate and the output end of the sprayer is loosened is prevented, and connection between the protective cover and the output end of the sprayer is further enhanced.

Description

Technical Field

[0001] This utility model relates to the field of biomedical technology, specifically to a pneumatic microfluidic control spray hood. Background Technology

[0002] Microfluidics, with its precise fluid manipulation capabilities, plays a crucial role in fields such as biomedical detection, drug screening, chemical synthesis, and environmental pollutant analysis. Its core challenge lies in achieving efficient and uniform dispersion of trace liquids (nanoliths to microliters) while avoiding cross-contamination and external interference. While existing pneumatically driven spraying devices can achieve rapid droplet generation, they lack effective control over the spray range, easily leading to sample cross-contamination or environmental exposure risks. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a pneumatic microfluidic controlled spray hood to solve the problems mentioned in the background section.

[0004] While existing pneumatically driven spraying devices can achieve rapid droplet generation, they lack effective control over the spray range, which can easily lead to cross-contamination of samples or environmental exposure risks.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pneumatic microfluidic controlled spray hood includes a container and a connecting tube. The container is located below the connecting tube. A sprayer is fixedly connected to one end of the connecting tube. A nozzle is fixedly connected to the output end of the sprayer. A connecting block is fixedly connected to the outside of the output end of the sprayer. A threaded sleeve is threadedly connected to the outside of the connecting block. A protective cover is fixedly connected to the bottom of the threaded sleeve. A mounting plate is fixedly connected to the top of the threaded sleeve. A clamping plate is symmetrically slidably connected to the top of the mounting plate. A second connecting rod is rotatably connected to one side of the clamping plate. A sector gear is fixedly connected to one end of the second connecting rod. There are two sets of sector gears, and the two sets of sector gears are meshed together. The end of the second connecting rod away from the clamping plate is rotatably connected to the mounting plate.

[0007] Preferably, the clamping plate is provided in two sets. One set of clamping plates is rotatably connected to the first connecting rod at the end away from the second connecting rod, and the other set of clamping plates is rotatably connected to the third connecting rod at the end away from the second connecting rod.

[0008] Preferably, the end of the first connecting rod away from the clamping plate is rotatably connected to the mounting plate.

[0009] Preferably, the top of the mounting plate is rotatably connected to a rotating shaft, and the end of the third link away from the clamping plate is fixedly connected to the rotating shaft.

[0010] Preferably, a fixing frame is fixedly connected to the top of the mounting plate, a fixing frame is fixedly connected inside the fixing frame, a connecting column is fixedly connected to the top of the rotating shaft, a connecting frame is slidably connected to the outside of the connecting column, a fixing plate is slidably connected inside the fixing frame, and the bottom of the fixing plate is fixedly connected to the connecting frame.

[0011] Preferably, a second limiting plate is fixedly connected to the bottom of the connecting frame, and a first limiting plate is fixedly connected inside the fixing frame. The first limiting plate and the second limiting plate are used in conjunction.

[0012] Preferably, a connecting plate is rotatably connected to the bottom of the second limiting plate, and a spring is fixedly connected between the connecting plate and the fixed frame.

[0013] This invention provides a pneumatic microfluidic controlled spray hood. Compared with the prior art, it has the following advantages:

[0014] 1. This pneumatic microfluidic controlled spray hood, through the setting of threaded sleeves, connecting blocks, sector gears, first connecting rods, second connecting rods, and third connecting rods, fixes the protective cover above the nozzle. Rotating the shaft synchronously drives two sets of clamping plates to move centripetally, achieving rapid centering and clamping of the clamping plates on the output end of the sprayer. Its arc-shaped groove design fits snugly against the outer wall of the sprayer, greatly improving assembly efficiency and connection stability, completely enclosing the nozzle in a sealed space. Combined with the rapid response characteristics of the pneumatically driven sprayer, it can generate uniform microdroplets while completely avoiding solution splashing, significantly reducing the risk of cross-contamination, and is especially suitable for aseptic operation or handling of toxic reagents.

[0015] 2. The pneumatic microfluidic control spray hood restricts the rotation of the shaft through the first and second limiting plates, preventing the shaft from rotating with the third connecting rod during use, loosening the connection between the clamp and the sprayer output end, and further strengthening the connection between the protective cover and the sprayer output end. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of the fixed frame of this utility model;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0019] Figure 4 This is a partial structural diagram of the present invention. Figure 1 ;

[0020] Figure 5 This is a partial structural diagram of the present invention. Figure 2 ;

[0021] Figure 6 This is a schematic diagram of the mounting plate structure of this utility model.

[0022] In the diagram: 1. Container; 2. Connecting pipe; 3. Sprayer; 4. Protective cover; 5. Threaded sleeve; 6. Connecting block; 7. Mounting plate; 8. Clamping plate; 9. First connecting rod; 10. Second connecting rod; 11. Sector gear; 12. Fixing frame; 13. Third connecting rod; 14. Rotating shaft; 15. Fixing frame; 16. Connecting column; 17. Fixing plate; 18. Connecting frame; 19. First limiting plate; 20. Second limiting plate; 21. Connecting plate; 22. Spring; 23. Nozzle. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-6This utility model provides a technical solution: a pneumatic microfluidic controlled spray hood, including a container 1 and a connecting pipe 2. The container 1 is located below the connecting pipe 2. A sprayer 3 is fixedly connected to one end of the connecting pipe 2. A nozzle 23 is fixedly connected to the output end of the sprayer 3. When the sprayer 3 is turned on, the liquid is driven to spray out from the nozzle 23 through rapid changes in air pressure, forming uniform micro-droplets that enter the container 1. A connecting block 6 is fixedly connected to the outside of the output end of the sprayer 3. The outside of the connecting block 6 is provided with external threads. A threaded sleeve 5 is connected to the threaded sleeve 5. A protective cover 4 is fixedly connected to the bottom of the threaded sleeve 5. The protective cover 4 is connected to the output end of the sprayer 3, so that the protective cover 4 is located above the nozzle 23, preventing the solution sprayed by the nozzle 23 from spraying to the surroundings, forming a sealed space. Even when spraying, the solution remains uncontaminated. The top of the threaded sleeve 5 is fixedly connected to the mounting plate 7, and the top of the mounting plate 7 is symmetrically slidably connected to the clamping plate 8. One side of the clamping plate 8 has an arc-shaped groove. The clamping plate 8 moves to both sides of the output end of the sprayer 3 and fits against both sides of the output end of the sprayer 3, further strengthening the connection between the protective cover 4 and the output end of the sprayer 3. One side of the clamping plate 8 is rotatably connected to the second connecting rod 10, and one end of the second connecting rod 10 is fixedly connected to the sector gear 11. There are two sets of sector gears 11, and the two sets of sector gears 11 are meshed together. The end of the second connecting rod 10 away from the clamping plate 8 is rotatably connected to the mounting plate 7. When one set of sector gears 11 rotates, it will drive the other set of sector gears 11 to rotate simultaneously. Under the action of the second connecting rod 10 and the sector gears 11, the two sets of clamping plates 8 move simultaneously.

[0025] Furthermore, the clamping plate 8 is provided with two sets. One set of clamping plates 8 is rotatably connected to the first link 9 at the end away from the second link 10. The movement of the clamping plate 8 moves the first link 9 to maintain the stability of the movement of the clamping plate 8. The other set of clamping plates 8 is rotatably connected to the third link 13 at the end away from the second link 10. The movement of the third link 13 moves the clamping plate 8 to move.

[0026] Furthermore, the end of the first link 9 furthest from the clamping plate 8 is rotatably connected to the mounting plate 7 to ensure the stability of the clamping plate 8 during movement.

[0027] Furthermore, a rotating shaft 14 is rotatably connected to the top of the mounting plate 7, and the end of the third link 13 away from the clamping plate 8 is fixedly connected to the rotating shaft 14. The rotating shaft 14 rotates, causing the third link 13 to move.

[0028] Furthermore, a fixing frame 12 is fixedly connected to the top of the mounting plate 7, and a fixing frame 15 is fixedly connected inside the fixing frame 12. The fixing frame 15 extends through both sides of the fixing frame 12. A connecting post 16 is fixedly connected to the top of the rotating shaft 14. The rotation of the connecting post 16 causes the rotating shaft 14 to rotate. A connecting frame 18 is slidably connected to the outside of the connecting post 16. Slide grooves are provided on both sides of the connecting post 16. Slider blocks are symmetrically fixedly connected to the inner wall of the connecting frame 18. The outer side of the slider fits against the slide groove and is slidably connected to the slide groove. A fixing plate 17 is slidably connected inside the fixing frame 15. A handle is fixedly connected to the top of the fixing plate 17 for better movement of the fixing plate 17. The bottom of the fixing plate 17 is fixedly connected to the connecting frame 18. The movement of the fixing plate 17 causes the connecting frame 18 to move. The rotation of the fixing plate 17 causes the connecting frame 18 to rotate. With the cooperation of the slide groove and the slider, the rotation of the connecting frame 18 causes the connecting post 16 to rotate.

[0029] Furthermore, a second limiting plate 20 is fixedly connected to the bottom of the connecting frame 18, and a first limiting plate 19 is fixedly connected inside the fixing frame 15. Limiting teeth are fixedly connected to the top of the second limiting plate 20 and the bottom of the first limiting plate 19. The first limiting plate 19 and the second limiting plate 20 work together to fix the position of the third connecting rod 13.

[0030] Furthermore, a connecting plate 21 is rotatably connected to the bottom of the second limiting plate 20. A spring 22 is fixedly connected between the connecting plate 21 and the fixed frame 15. When the second limiting plate 20 moves, it moves the connecting plate 21 toward the spring 22. The spring 22 is compressed and generates elastic force. When the spring 22 loses its compressive force, under the action of the elastic force, the spring 22, along with the connecting plate 21 and the second limiting plate 20, returns to its original position.

[0031] In use, first, the protective cover 4 is fixed to the outside of the sprayer 3 using the threaded sleeve 5 and connecting block 6. The protective cover 4 is located above the nozzle 23. Then, the handle on the top of the fixing plate 17 is pressed, and the fixing plate 17 moves along the outside of the connecting column 16 with the fixing frame 15. The movement of the fixing frame 15 causes the second limiting plate 20 to move away from one side of the first limiting plate 19, and the connecting column 16 is no longer restricted. The fixing plate 17 is rotated by the handle. The rotation of the fixing plate 17 causes the connecting column 16 to rotate through the fixing frame 15. The rotation of the connecting column 16 causes the third connecting rod 13 to rotate through the rotating shaft 14. When the third connecting rod 13 rotates, it moves a set of clamping plates 8. The movement of the set of clamping plates 8 causes a set of second connecting rods 10 to move. Under the action of the sector gear 11, the two sets of second connecting rods 10 move together. Simultaneously, the two sets of clamping plates 8 move outwards towards the output end of the sprayer 3 until the arc-shaped groove on one side of the clamping plate 8 fits against the outer side of the output end of the sprayer 3. Then, the pressure on the fixing plate 17 is released. Under the action of the spring force of the spring 22, the teeth on one side of the first limiting plate 19 and the second limiting plate 20 re-engage, restricting the movement of the rotating shaft 14. This connects the two sets of clamping plates 8 and the output end of the sprayer 3, strengthening the connection between the output end of the sprayer 3 and the protective cover 4. After the sprayer 3 is turned on, the rapid change in air pressure drives the liquid to spray out from the nozzle 23, forming uniform micro-droplets that enter the container 1. The protective cover 4 above the nozzle 23 prevents the solution from spraying to the surroundings, forming a sealed space. This ensures that the solution is not contaminated even when it is not spraying outwards.

[0032] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pneumatic microfluidic control spray hood comprising a container (1) and a connecting tube (2), characterized in that: A container (1) is provided below the connecting pipe (2). A sprayer (3) is fixedly connected to one end of the connecting pipe (2). A nozzle (23) is fixedly connected to the output end of the sprayer (3). A connecting block (6) is fixedly connected to the outside of the output end of the sprayer (3). A threaded sleeve (5) is threadedly connected to the outside of the connecting block (6). A protective cover (4) is fixedly connected to the bottom of the threaded sleeve (5). An installation plate (7) is fixedly connected to the top of the threaded sleeve (5). A clamping plate (8) is symmetrically slidably connected to the top of the installation plate (7). A second connecting rod (10) is rotatably connected to one side of the clamping plate (8). A sector gear (11) is fixedly connected to one end of the second connecting rod (10). There are two sets of sector gears (11). The two sets of sector gears (11) are meshed and connected. The end of the second connecting rod (10) away from the clamping plate (8) is rotatably connected to the installation plate (7).

2. The pneumatic microfluidic control spray hood of claim 1, wherein: The clamping plate (8) is provided in two sets. One set of the clamping plate (8) is rotatably connected to the first connecting rod (9) at the end away from the second connecting rod (10), and the other set of the clamping plate (8) is rotatably connected to the third connecting rod (13) at the end away from the second connecting rod (10).

3. The pneumatic microfluidic control spray hood of claim 2, wherein: The end of the first connecting rod (9) away from the clamp (8) is rotatably connected to the mounting plate (7).

4. The pneumatic microfluidic control spray hood of claim 2, wherein: The top of the mounting plate (7) is rotatably connected to a rotating shaft (14), and the end of the third link (13) away from the clamping plate (8) is fixedly connected to the rotating shaft (14).

5. The pneumatic microfluidic control spray hood of claim 4, wherein: The top of the mounting plate (7) is fixedly connected to a fixing bracket (12), and the inside of the fixing bracket (12) is fixedly connected to a fixing frame (15). The top of the rotating shaft (14) is fixedly connected to a connecting column (16), and the outside of the connecting column (16) is slidably connected to a connecting frame (18). The inside of the fixing frame (15) is slidably connected to a fixing plate (17), and the bottom of the fixing plate (17) is fixedly connected to the connecting frame (18).

6. The pneumatic microfluidic control spray hood of claim 5, wherein: The bottom of the connecting frame (18) is fixedly connected to a second limiting plate (20), and the inside of the fixing frame (15) is fixedly connected to a first limiting plate (19). The first limiting plate (19) and the second limiting plate (20) are used together.

7. The pneumatic microfluidic control spray hood of claim 6, wherein: The bottom of the second limiting plate (20) is rotatably connected to a connecting plate (21), and a spring (22) is fixedly connected between the connecting plate (21) and the fixed frame (15).

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