Adjustable droplet collection and splash prevention device

Abstract

The invention discloses an adjustable liquid drop collecting and anti-splashing device, and relates to the technical field of liquid engine testing devices, the adjustable liquid drop collecting and anti-splashing device comprises at least two central arc-shaped baffles which can be detachably spliced with each other, threaded holes are formed in the circumferential edges of the central arc-shaped baffles, and a plurality of connecting through holes are distributed in the radial edges of the central arc-shaped baffles at intervals; the two central arc-shaped baffles are fixedly spliced through the connecting through holes, and the circle center is coaxial with an outlet of the experimental spray pipe after splicing; and the splicing type mounting plate is arranged in a segmented arc shape, complementary buckle type connecting parts are arranged at the head and the tail of each segment, and accurate positioning is achieved through mutual cooperation of the central arc-shaped baffle, the splicing type mounting plate and the connecting support. The spliced mounting plates are spliced through buckles and fixed to the central arc-shaped baffle, and the connecting support fixes the device on an experimental platform to ensure that an outlet of the spray pipe is located at the circle center of the central arc-shaped baffle. The small collection box can accurately collect liquid drops, and the data accuracy is prevented from being influenced by position deviation.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid engine test devices, and specifically to an adjustable droplet collection and anti-splash device. Background Technique

[0002] When a liquid engine is operating, its unsteady characteristics cause the propellant to not burn completely during startup and shutdown processes, generating intermediate products. Some droplets are not completely evaporated and are ejected to form liquid-phase pollutants in the plume. These droplets accumulate into a liquid film on the inner wall of the engine and then break into droplets at the nozzle exit. Some droplets will move laterally or even reversely towards the nozzle.

[0003] Studying the spatial distribution characteristics of droplets in the engine plume is of great significance for reducing liquid-phase pollution and optimizing engine design. Currently, there are many problems with existing experimental devices: on the one hand, the commonly used method of using a fixed baffle to collect droplets can prevent splashing and polluting the environment, but it cannot obtain the spatial distribution characteristics of droplets; on the other hand, although a quartz crystal microbalance (QCM) can measure the total mass of pollutants deposited on the material surface, the amount of collected droplets is small, only micro-measurements can be achieved, and the position is fixed. It cannot measure the total mass of droplets reaching on the circumferences at different distances from the nozzle exit, and it is also difficult to effectively collect and measure the reaching mass of reversely moving droplets. In addition, existing anti-splash and droplet collection devices are installed near the nozzle, which will interfere with the plume field and laser irradiation, affecting the observation of droplet movement in the free flow field.

[0004] Therefore, we designed an adjustable droplet collection and anti-splash device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an adjustable droplet collection and anti-splash device to solve the problems raised in the above background technique.

[0006] To solve the above technical problems, the adjustable droplet collection and anti-splash device provided by the present invention includes,

[0007] A central circular arc baffle, at least two pieces and can be detachably spliced. The central circular arc baffle is provided with threaded holes along the circular edge and a plurality of connection through holes are spaced along the radial edge of the central circular arc baffle. Two central circular arc baffles are fixedly spliced through the connection through holes, and the center is coaxial with the nozzle exit of the experiment after splicing;

[0008] A spliced mounting plate, arranged in a segmented circular arc shape, with complementary snap connection parts at the head and tail of each segment. After splicing, it forms an annular skeleton. A limiting groove and a fixing hole are opened inside the spliced mounting plate, where,

[0009] The limiting groove is located in the midline area of the inner wall of the spliced mounting plate, and the extending direction of the groove body is perpendicular to the axis of the experimental nozzle. The fixing holes can be used in cooperation with the threaded holes. The center arc-shaped baffle, the center of the spliced mounting plate, and the nozzle outlet coincide;

[0010] The moving sliding groove is evenly fixed in the limiting groove of the spliced mounting plate along the circumferential direction and can move along the radial direction. A small box connection hole is provided at the end of the moving sliding groove, and a collecting small box is connected to the small box connection hole.

[0011] Furthermore, it further includes a connecting bracket. The connecting bracket is provided with an overall fixing hole and a limiting fixing groove. It is fixed to the experimental platform through the overall fixing hole, and is clamped and bolted to the spliced mounting plate through the limiting fixing groove, restricting the experimental nozzle outlet to be located at the center of the center arc-shaped baffle.

[0012] Furthermore, the center arc-shaped baffle is made of transparent acrylic material, and the single-sided center arc-shaped baffle can be independently disassembled. The other baffle is used to form a splash-proof barrier and at the same time form an open flow field for the optical device to observe the movement of droplets.

[0013] Furthermore, a sliding adjustment mechanism is arranged in the moving sliding groove, including a locking screw provided at the end of the moving sliding groove for abutting against the side wall of the limiting groove to achieve position fixing.

[0014] Furthermore, the moving sliding groove and the collecting small box are connected through a hinge structure, so that the collecting small box can rotate around the axis by a certain angle to adapt to the reverse splash angle of the droplets. The collecting small box is made of transparent acrylic material.

[0015] Furthermore, the opening direction of the collecting small box is vertically upward, the height of the front wall surface is lower than that of the rear wall surface, the front wall surface is an inclined diversion surface, and the rear wall surface is a vertical baffle.

[0016] Furthermore, the limiting grooves of the spliced mounting plate are distributed along the circumference, and each limiting groove corresponds to one moving sliding groove for installation.

[0017] Furthermore, the threaded holes of the center arc-shaped baffle are evenly distributed along the circumference, which is used to establish a coordinate system with the nozzle outlet as the origin, facilitating the processing of droplet spatial distribution data.

[0018] Furthermore, the center arc-shaped baffle, the moving sliding groove and the collecting small box adopt a symmetrical layout.

[0019] Furthermore, the radial moving range of the moving sliding groove is from the proximal end to the distal end area of the experimental nozzle outlet.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The central circular arc baffle, the splicing mounting plate and the connecting bracket cooperate with each other to achieve precise positioning. The splicing mounting plate is fixed to the central circular arc baffle by snap splicing, and the connecting bracket stabilizes the device on the experimental platform to ensure that the nozzle outlet is located at the center of the central circular arc baffle. This enables the collection small box to accurately collect the droplets, avoiding position deviation from affecting the data accuracy.

[0022] 2. The movable sliding groove can move along the radius within the limiting groove of the splicing mounting plate, and its end is connected to the collection small box. The experimenter can flexibly adjust the distance and angle between the collection small box and the nozzle outlet to comprehensively collect droplets at different positions. The large-range radial movement of the movable sliding groove enables the collection small box to cover different areas around the nozzle, contributing to obtaining complete droplet spatial distribution data.

[0023] 3. Remove the unilateral central circular arc baffle, and use the other side as a splash-proof barrier while forming an open flow field. This facilitates observing the droplet movement trajectory with optical equipment and can also measure the total mass of droplet deposition. Multiple observations can be completed in one experiment, reducing the number of experiments, avoiding errors in multiple experiments, and improving the experimental efficiency and data reliability.

[0024] 4. The collection small box has an upward opening to prevent droplets from flowing out, and the front-low and rear-high wall surface is conducive to collecting reverse droplets. At the same time, the symmetrical layout of the device enables observing the droplet movement trajectory and measuring the deposition mass simultaneously in one experiment, reducing the number of experiments, lowering costs, ensuring data synchronization and relevance, and improving the quality of experimental data. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the planar structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the overall structure of the present invention after disassembly;

[0028] Figure 4 It is a schematic diagram of the planar structure of the present invention after disassembly;

[0029] Figure 5 Schematic diagram of the central circular arc baffle of the present invention;

[0030] Figure 6 Schematic diagram of the splicing mounting plate of the present invention;

[0031] Figure 7 Schematic diagram of the movable sliding groove of the present invention;

[0032] Figure 8 Schematic diagram of the collection small box of the present invention;

[0033] Figure 9 It is a schematic diagram of the connecting bracket of the present invention.

[0034] In the figure: 1. Central circular arc baffle; 101. Threaded hole; 102. Connecting through hole;

[0035] 2. Split mounting plate; 201. Connecting fixing hole; 202. Limiting groove; 203. Connecting part;

[0036] 3. Moving chute; 301. Small box connecting hole;

[0037] 4. Collection small box;

[0038] 5. Connecting bracket; 501. Overall fixing hole; 502. Limiting fixing groove. Specific implementation manner

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figures 1-9 , the present invention provides a technical solution: an adjustable droplet collection and anti-splash device, including,

[0041] The central circular arc baffle 1, at least two pieces and can be detachably spliced with each other. The central circular arc baffle 1 is provided with threaded holes 101 along the circumferential edge, and a plurality of connecting through holes 102 are spaced along the radial edge of the central circular arc baffle 1. Two central circular arc baffles 1 are fixedly spliced through the connecting through holes 102, and the center is coaxial with the outlet of the experimental nozzle after splicing;

[0042] The split mounting plate 2 is arranged in a segmented circular arc shape, and complementary snap-type connecting parts 203 are provided at the head and tail of each segment. After splicing, it forms an annular skeleton. The split mounting plate 2 is provided with a limiting groove 202 and a connecting fixing hole 201 inside, wherein,

[0043] The limiting groove 202 is located in the middle line area of the inner wall of the split mounting plate 2, and the extending direction of the groove body is perpendicular to the axis of the experimental nozzle. The connecting fixing hole 201 can be used in cooperation with the threaded hole 101. The centers of the central circular arc baffle 1 and the split mounting plate 2 coincide with the nozzle outlet;

[0044] The moving chute 3 is uniformly fixed in the limiting groove 202 of the split mounting plate 2 along the circumferential direction and can move along the radial direction. A small box connecting hole 301 is provided at the end of the moving chute 3, and a collection small box 4 is connected to the small box connecting hole 301

[0045] In specific implementation, the central circular arc baffle 1 is composed of at least two detachable and spliceable components. After being fixedly spliced through the connecting through holes 102, its center is coaxial with the outlet of the experimental nozzle. Its setting provides a reference positioning for the device. The spliced mounting plate 2 is in a segmented circular arc shape, and each segment is spliced through the complementary snap connection part 203 to form an annular skeleton, providing an installation basis for the moving chute 3. The limiting groove 202 is located in the middle line area of the inner wall of the spliced mounting plate 2 and is perpendicular to the axis of the nozzle, defining the moving path of the moving chute 3 in the radial direction. The moving chutes 3 are uniformly fixed in the limiting groove 202 along the circumference and can slide therein. The small box connection hole 301 at the end thereof is connected to the collection small box 4. By adjusting the position of the moving chute 3, the distance between the collection small box 4 and the nozzle outlet can be changed. The above setting solves the problems that the existing fixed baffle cannot obtain the spatial distribution characteristics of the collected droplets and the existing collection device has a fixed position and cannot measure the total mass of the droplets reaching at different distances. Moreover, the spliceable design enables the device to be flexibly assembled. The moving chute 3 drives the collection small box 4 to move, so that the droplets on the circumferences at different distances can be collected.

[0046] Refer to Figures 1-9 , and it further includes a connecting bracket 5. The connecting bracket 5 is provided with an overall fixing hole 501 and a limiting fixing groove 502. It is fixed to the experimental platform through the overall fixing hole 501 and is clamped and bolt-locked with the spliced mounting plate 2 through the limiting fixing groove 502 to constrain the outlet of the experimental nozzle to be located at the center of the central circular arc baffle 1.

[0047] In specific implementation, the connecting bracket 5 is fixed to the experimental platform through the overall fixing hole 501 to ensure that the device is stable and does not shake during the experiment. At the same time, it is clamped and bolt-locked with the spliced mounting plate 2 through the limiting fixing groove 502 to constrain the outlet of the experimental nozzle to be located at the center of the central circular arc baffle 1, ensuring the accurate relative position between the collection device and the nozzle, so that the collection small box 4 can collect the droplets at the correct position.

[0048] Refer to Figures 1-9 , the central circular arc baffle 1 is made of transparent acrylic material, and the unilateral central circular arc baffle 1 can be independently disassembled. The other baffle is used to form a splash-proof barrier and at the same time form an open flow field for the optical equipment to observe the movement of the droplets.

[0049] In specific implementation, the central arc-shaped baffle 1 is made of transparent acrylic material and can be independently disassembled on one side. When it is necessary to observe the splashing behavior of droplets in the free flow field, one side of the baffle is removed, and the other side serves as a splash-proof barrier to prevent droplets from splashing and polluting the environment. At the same time, the open side forms an unobstructed flow field, which is convenient for optical devices such as PIV and PTV technology to observe the movement of droplets. This setting solves the problem that the existing device interferes with the plume flow field and laser irradiation, affecting the observation of droplet movement in the free flow field. The transparent material and the one-sided detachable design prevent droplet splashing while not affecting the observation of droplet movement by optical devices, improving the accuracy and efficiency of the experiment.

[0050] Refer to Figures 1-9 , a sliding adjustment mechanism is arranged in the moving chute 3, including a locking screw provided at the end of the moving chute 3 for abutting against the side wall of the limit groove 202 to achieve position fixing.

[0051] In specific implementation, when the moving chute 3 moves to the required position, tighten the locking screw so that it abuts against the side wall of the limit groove 202, thereby fixing the position of the moving chute 3 and ensuring that the collection cartridge 4 can stably be in a specific position to collect droplets. This setting enables the collection cartridge 4 to be accurately located on the circumference at different distances from the nozzle outlet, improving the accuracy of the droplet collection position and helping to obtain more accurate droplet spatial distribution data.

[0052] Refer to Figures 1-9 , the moving chute 3 and the collection cartridge 4 are connected by a hinge structure, enabling the collection cartridge 4 to rotate around the axis by a certain angle to adapt to the reverse splashing angle of the droplets. The collection cartridge 4 is made of transparent acrylic material.

[0053] In specific implementation, the moving chute 3 and the collection cartridge 4 are connected by a hinge structure, enabling the collection cartridge 4 to rotate around the axis by a certain angle. When the droplets splash in the reverse direction, the collection cartridge 4 can adaptively rotate according to the reverse splashing angle of the droplets to better collect the droplets moving in the reverse direction. The collection cartridge 4 is made of transparent acrylic material, which is convenient for experimenters to observe the internal droplet collection situation. This setting solves the problem that it is difficult for the existing device to effectively collect the droplets moving in the reverse direction. The hinge structure improves the collection efficiency of the collection cartridge 4 for the reverse droplets, and the transparent material is convenient for observation.

[0054] Refer to Figures 1-9 , the opening direction of the collection cartridge 4 is vertically upward, the height of the front wall surface is lower than that of the rear wall surface, the front wall surface is an inclined diversion surface, and the rear wall surface is a vertical baffle.

[0055] During specific implementation, the opening of the collection cartridge 4 is vertically upward to prevent the deposited droplets from flowing out of the collection cartridge 4 due to gravity. The front wall surface is an inclined diversion surface with a height lower than that of the rear wall surface, and the rear wall surface is a vertical baffle. The inclined front wall surface is conducive to guiding the droplets moving in the reverse direction into the collection cartridge 4, while the vertical rear wall surface can block the splashing of droplets, ensuring that the collected droplets will not be lost. This setting solves the problems of difficult collection of droplets moving in the reverse direction and inaccurate measurement caused by easy outflow of droplets in the existing device.

[0056] Refer to Figures 1-9 , the limiting grooves 202 of the spliced mounting plate 2 are distributed along the circumference, and each limiting groove 202 corresponds to the installation of a moving chute 3.

[0057] During specific implementation, the limiting grooves 202 of the spliced mounting plate 2 are distributed along the circumference, and each limiting groove 202 corresponds to the installation of a moving chute 3. Multiple moving chutes 3 can drive the collection cartridges 4 to be distributed at different angular positions simultaneously, so as to comprehensively collect droplets at different angles in the circumferential direction. This setting solves the problem that the existing device can only collect droplets locally and cannot comprehensively obtain the spatial distribution characteristics of droplets in the circumferential direction. Moreover, the design of multiple collection cartridges 4 enables the device to collect droplets more comprehensively, providing more complete data for studying the spatial distribution of droplets in the plume.

[0058] Refer to Figures 1-9 , the threaded holes 101 of the central circular arc baffle 1 are evenly distributed along the circumference, which are used to establish a coordinate system with the nozzle outlet as the origin, facilitating the processing of droplet spatial distribution data.

[0059] During specific implementation, the threaded holes 101 of the central circular arc baffle 1 are evenly distributed along the circumference. Taking the nozzle outlet as the origin, these threaded holes 101 can be used as coordinate reference points to establish a coordinate system. By determining the relative positions of the collection cartridges 4 and the threaded holes 101, the spatial positioning of the collected droplets is carried out, which is convenient for subsequent processing and analysis of the droplet spatial distribution data. This setting facilitates the quantification of the droplet collection position by establishing a coordinate system, improving the accuracy of data processing.

[0060] Refer to Figures 1-9 , the central circular arc baffle 1, the moving chute 3 and the collection cartridge 4 adopt a symmetrical layout.

[0061] During specific implementation, the central circular arc baffle 1, the moving chute 3, and the collection box 4 adopt a symmetric layout. During the experiment, the components on one side of the axis of the nozzle can be removed, and the components on the other side can still work normally. The removed side forms an open flow field for observing the movement trajectory of droplets, and the remaining side continues to collect droplets to measure the deposition mass. This setting solves the problem that multiple experiments are required in existing experiments to obtain different types of data, improving the experimental efficiency. The observation of the droplet movement trajectory and the measurement of the deposition mass are achieved simultaneously in one experiment, reducing the number of experiments, lowering the experimental cost, and ensuring the synchronization and relevance of the data.

[0062] Refer to Figures 1-9 , the radial movement range of the moving chute 3 is from the proximal end to the distal end area of the experimental nozzle outlet.

[0063] During specific implementation, the radial movement range of the moving chute 3 is from the proximal end to the distal end area of the experimental nozzle outlet, which can drive the collection box 4 to cover different distances around the nozzle. By collecting droplets at different distance positions, the deposition mass data of droplets at different radial distances can be comprehensively obtained.

[0064] Working principle: When conducting a liquid-phase contamination experiment on a liquid rocket engine, first, the central circular arc baffle 1 is spliced through the connecting through-hole 102 to ensure that the center is coaxial with the experimental nozzle outlet, providing a reference positioning for the entire device. Then, the segmented spliced mounting plate 2 is spliced into an annular framework through the complementary snap connection part 203, and the connecting fixing hole 201 is used to cooperate with the threaded hole 101 of the central circular arc baffle 1 for fixation, so that the centers of the two coincide with the nozzle outlet. Then, the moving chute 3 is evenly installed in the limiting groove 202 in the middle line area of the inner wall of the spliced mounting plate 2 along the circumferential direction, and its end small box connection hole 301 is connected to the collection box 4. Finally, the connecting bracket 5 is used to fix the device on the experimental platform through the overall fixing hole 501, and is clamped and bolted with the spliced mounting plate 2 through the limiting fixing groove 502 to ensure that the nozzle outlet is located at the center of the central circular arc baffle 1, completing the installation and positioning of the device;

[0065] If the experiment needs to observe the splashing behavior of droplets in the free flow field, the unilateral central circular arc baffle 1 can be removed, and the baffle on the other side serves as a splash-proof barrier, while forming an open flow field for the optical device to observe the movement of droplets. According to the research needs, the experimenter can change the distance between the collection box 4 and the nozzle outlet by adjusting the position of the moving chute 3 in the limiting groove 202. When moving, first loosen the locking screw at the end of the moving chute 3, and then tighten the locking screw after moving to the specified position so that it abuts against the side wall of the limiting groove 202 to fix the position of the moving chute 3 and ensure that the collection box 4 can be accurately located at the target position;

[0066] After liquid droplets are generated by the operation of the liquid engine, the collection cartridge 4 starts to collect the liquid droplets. Since the opening of the collection cartridge 4 faces vertically upward, it can prevent the deposited liquid droplets from flowing out due to gravity. Its front wall surface is an inclined diversion surface and is lower than the rear wall surface. The inclined front wall surface is conducive to guiding the liquid droplets moving in the reverse direction into the collection cartridge 4, while the vertical rear wall surface can block the splashing of the liquid droplets. The multiple limiting grooves 202 on the spliced mounting plate 2 are correspondingly installed with the moving sliding grooves 3, which can drive the collection cartridge 4 to be distributed at different angular positions to comprehensively collect the liquid droplets at different angles in the circumferential direction. At the same time, the radial movement range of the moving sliding groove 3 is from the proximal end to the distal end area of the experimental nozzle outlet, which can enable the collection cartridge 4 to cover the areas at different distances around the nozzle, realizing the collection of the liquid droplets at different radial distances;

[0067] During the experiment, optical devices such as PIV and PTV technologies are used to observe the movement trajectories of the liquid droplets on the open flow field side by the equipment. At the same time, by measuring the mass difference of the collection cartridge 4 before and after the experiment, the total deposition mass of the liquid droplets at different positions is obtained. The threaded holes 101 of the central circular arc baffle 1 are evenly distributed along the circumference. Taking the nozzle outlet as the origin to establish a coordinate system, the collected liquid droplets can be spatially positioned, facilitating the subsequent processing and analysis of the liquid droplet spatial distribution data. In addition, since the central circular arc baffle 1, the moving sliding groove 3 and the collection cartridge 4 adopt a symmetric layout, the observation of the liquid droplet movement trajectory and the measurement of the deposition mass can be realized simultaneously in one experiment, reducing the number of experiments, lowering the experimental cost, and ensuring the synchronization and relevance of the data.

Claims

1. An adjustable droplet collection and anti-splash device, characterized in that, Including, A central circular arc-shaped baffle (1), with at least two pieces that can be detachably spliced. The central circular arc-shaped baffle (1) is provided with threaded holes (101) along the circumferential edge, and a plurality of connecting through holes (102) are distributed at intervals along the radial edge of the central circular arc-shaped baffle (1). Two central circular arc-shaped baffles (1) are fixedly spliced through the connecting through holes (102), and the centers coincide with the axis of the experimental nozzle outlet after splicing; A spliced mounting plate (2), which is arranged in a segmented circular arc shape, and complementary snap-connection parts (203) are provided at the head and tail of each segment. After splicing, it forms an annular skeleton. A limiting groove (202) and a connecting fixing hole (201) are provided inside the spliced mounting plate (2), where, The limiting groove (202) is located in the midline area of the inner wall of the spliced mounting plate (2), and the extending direction of the groove body is perpendicular to the axis of the experimental nozzle. The connecting fixing hole (201) can be used in cooperation with the threaded hole (101). The centers of the central circular arc-shaped baffle (1) and the spliced mounting plate (2) coincide with the nozzle outlet; Moving chutes (3), which are uniformly fixed in the limiting grooves (202) of the spliced mounting plate (2) along the circumferential direction and can move along the radial direction. A small box connecting hole (301) is provided at the end of the moving chute (3), and a collecting small box (4) is connected to the small box connecting hole (301).

2. The adjustable droplet collection and anti-splash device according to claim 1, wherein: It also includes a connecting bracket (5). The connecting bracket (5) is provided with an overall fixing hole (501) and a limiting fixing groove (502). It is fixed to the experimental platform through the overall fixing hole (501), and is clamped and bolted to the spliced mounting plate (2) through the limiting fixing groove (502) to constrain the experimental nozzle outlet to be located at the center of the central circular arc-shaped baffle (1).

3. The adjustable droplet collection and anti-splash device according to claim 1, characterized in that: The central circular arc-shaped baffle (1) is made of transparent acrylic material, and one-sided central circular arc-shaped baffle (1) can be independently disassembled. The other baffle is used to form a splash-proof barrier and at the same time form an open flow field for the optical device to observe the movement of droplets.

4. The adjustable droplet collection and anti-splash device according to claim 1, characterized in that: A sliding adjustment mechanism is arranged in the moving chute (3), including a locking screw provided at the end of the moving chute (3) for abutting against the side wall of the limiting groove (202) to achieve position fixing.

5. The adjustable droplet collection and anti-splash device according to claim 1, characterized in that: The moving chute (3) is connected to the collecting small box (4) through a hinge structure, so that the collecting small box (4) can rotate around the axis by a certain angle to adapt to the reverse splash angle of the droplets. The collecting small box (4) is made of transparent acrylic material.

6. The adjustable droplet collection and anti-splash device according to claim 1, wherein: The opening direction of the collecting small box (4) is vertically upward, the height of the front wall surface is lower than that of the rear wall surface, the front wall surface is an inclined diversion surface, and the rear wall surface is a vertical baffle.

7. The adjustable droplet collection and anti-splash device according to claim 1, wherein: The limiting grooves (202) of the spliced mounting plate (2) are distributed along the circumference, and each limiting groove (202) corresponds to one moving chute (3) for installation.

8. The adjustable droplet collection and anti-splash device according to claim 1, wherein: The threaded holes (101) of the central circular arc-shaped baffle (1) are evenly distributed along the circumference, which is used to establish a coordinate system with the nozzle outlet as the origin to facilitate the processing of droplet spatial distribution data.

9. The adjustable droplet collection and anti-splash device according to claim 1, wherein: The central circular arc-shaped baffle (1), the moving chute (3) and the collecting small box (4) adopt a symmetrical layout.

10. The adjustable droplet collection and anti-splash device according to claim 1, wherein: The radial movement range of the moving chute (3) is from the proximal end to the distal end area of the experimental nozzle outlet.

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