Underwater cavitation jet experiment table with modular base

Abstract

The invention relates to the technical field of cleaning equipment, in particular to an underwater cavitation jet experiment table with a modular base, which comprises a water tank support frame, a transparent water tank is arranged in the water tank support frame, and a sliding table is arranged at the top of the water tank support frame in the vertical direction; the injection control device is mounted on the sliding table to move in the vertical direction, and comprises a shutter assembly and a nozzle assembly; the test piece impact table assembly is used for fixing a test piece, the test piece impact table assembly is located in the transparent water tank and installed in a bottom-sitting mode, and the test piece impact table assembly comprises a modular base, an impact table and a test piece limiting plate located above the impact table. The sliding table is used for driving the injection control device to move, so that experiment requirements of different target distances are met; the shutter piece can be released or closed through automatic program control, the test time of different test pieces is accurately controlled, and the test effect is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning equipment, and in particular to an underwater cavitation jet test bench with a modular base. Background Art

[0002] During the voyage of a ship, the surface of the hull will inevitably be affected by the accumulation of biological fouling, which may include algae, shellfish, mollusks and other organisms. The accumulation of biological fouling will have many effects on the surface of the hull, including increasing navigation resistance, reducing hull efficiency, and causing corrosion and damage to the hull. The cavitation cleaning device uses the high-pressure load generated by the cavitation water jet and the impact effect of cavitation collapse to erode the material surface and achieve the effect of cleaning the dirt on the hull surface. In order to improve the effect of the cavitation cleaning device in removing dirt, the test equipment of the existing cavitation cleaning device simulates actual working conditions to carry out a series of performance tests.

[0003] The Chinese invention patent application with application publication number CN112657570A discloses an underwater cavitation jet cleaning test bench, comprising: a test bench frame, on which a water tank is provided; a motion mechanism, wherein the motion mechanism comprises a first motion device, a second motion device and a third motion device, wherein the first motion device is connected to the test bench frame, the second motion device is connected to the first motion device, and the third motion device is connected to the second motion device, wherein the first motion device drives the second motion device to move in a first direction, and the second motion device drives the third motion device to move in a second direction; a spray device, which is installed on the end of the third motion device and extends into the experimental space of the water tank, and the third motion device drives the spray device to move in a third direction, wherein the first direction, the second direction and the third direction are different from each other; and a control device, wherein the control device is electrically connected to the motion mechanism and the spray device. The above-mentioned public scheme improves the cleaning effect by moving the jet device to the optimal cleaning target distance relative to the target part to be cleaned, but the test scheme is single and can only adjust the test target distance. The test method has limitations and the test effect has a large error. Therefore, it is very necessary to design a test bench that can carry out diversified cavitation jet experiments according to different experimental conditions. Summary of the invention

[0004] Technical purpose: In order to overcome the deficiencies in the prior art, the present invention provides an underwater cavitation jet test bench with a modular base.

[0005] Technical solution: To achieve the above purpose, the present invention discloses an underwater cavitation jet test bench with a modular base, comprising:

[0006] A water tank support frame, wherein a transparent water tank is arranged inside the water tank support frame, and a slide is arranged in the vertical direction at the top of the water tank support frame;

[0007] An injection control device, which is mounted on the slide table for vertical displacement and includes a shutter assembly and a nozzle assembly;

[0008] The specimen impact table assembly is used to fix the specimen, and is installed in a bottom-sitting manner inside the transparent water tank. The specimen impact table assembly includes a modular base, an impact table, and a specimen limiting plate located above the impact table.

[0009] Preferably, the shutter assembly comprises a first mounting base detachably connected to the slide and a gear pair, any gear in the gear pair is connected to a servo motor, the other gear is connected to a shutter shaft, and a shutter plate is provided at the end of the shutter shaft.

[0010] Preferably, a shutter shaft sleeve is provided on the outer sleeve of the shutter shaft, and the shutter shaft sleeve is clamped and connected to the first mounting base.

[0011] Preferably, the nozzle assembly is provided with a second mounting base detachably connected to the slide, the second mounting base is connected with a nozzle connecting tube, a nozzle is provided at the end of the nozzle connecting tube, and the shutter piece can be rotated to below the nozzle.

[0012] Preferably, a pressure sensor for detecting pressure is provided on the nozzle connecting pipe.

[0013] Preferably, the modular base is made of PP material and is provided with a plurality of bolt holes.

[0014] Preferably, the specimen limiting plate comprises a base plate connected to the impact table, a through hole is provided in the middle of the base plate, a limiting block for clamping the specimen is fixed on the base plate by bolts, the limiting block comprises a pressing sheet and a pressing plate, and the pressing sheet is in contact with the specimen.

[0015] Preferably, the pressing sheet is made of nylon, and the pressing plate is made of stainless steel.

[0016] Preferably, a vortex-eliminating plate with adjustable vertical position is provided above the shutter assembly and the nozzle assembly, and the vortex-eliminating plate has a double-layer structure, with an upper layer of an EVA board and a lower layer of a sponge board.

[0017] Preferably, the transparent water tank is provided with a drain outlet connected to a drain hose, and a heightening frame is provided at the bottom of the water tank support frame.

[0018] The beneficial effects of the present invention are:

[0019] 1. This device can perform free cavitation jet tests and impact cavitation jet specimen erosion tests. The slide table is used to drive the jet control device to meet the experimental requirements of different target distances. The shutter can be released or closed through automatic program control, and the test time of different specimens can be accurately controlled to ensure the test effect.

[0020] 2. The shutter assembly and nozzle assembly adopt a split design, which can realize the rapid modular disassembly and assembly of the shutter assembly. The shutter assembly can also be removed during high-speed photography to avoid interfering with the picture. The shutter assembly is far away from the nozzle, which can reduce the interference of the shutter piece on the cavitation jet flow during movement and improve the accuracy of the test; the bottom-mounted specimen impact table assembly can also avoid the influence of displacement on the flow of the specimen surface; the pressure sensor is used to monitor the injection pressure.

[0021] 3. After the experiment, the water in the transparent water tank can be completely drained using the drain port of the water tank, making it easier to maintain the transparent water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The three-dimensional structure of the present invention Figure 1 ;

[0023] Figure 2 The three-dimensional structure of the present invention Figure 2 ;

[0024] Figure 3 is a three-dimensional diagram of the injection control device of the present invention;

[0025] Figure 4 For the present invention Figure 3 Magnified view of area A in the middle;

[0026] Figure 5 For the present invention Figure 2 Magnified view of area B.

[0027] In the figure, 1. water tank support frame; 2. transparent water tank; 3. slide; 4. injection control device; 5. shutter assembly; 6. nozzle assembly; 7. specimen limit plate; 8. impact table; 9. modular base; 10. specimen impact table assembly; 11. heightening frame; 12. first mounting base; 13. gear pair; 14. servo motor; 15. shutter shaft; 16. shutter shaft sleeve; 17. shutter piece; 18. second mounting base; 19. nozzle connecting pipe; 20. pressure sensor; 21. nozzle; 22. substrate; 23. through hole; 24. limit block; 25. pressing piece; 26. pressing plate; 27. vortex elimination plate; 28. drain outlet. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1 To Attachment Figure 5The principles and features of the present invention are described, and the examples given are only used to explain the present invention, rather than to limit the scope of the present invention.

[0029] An underwater cavitation jet experimental platform with a modular base can be used to carry out underwater cavitation jet experiments, such as Figure 1 — Figure 2 As shown, it includes: a water tank support frame 1, a jet control device 4 and a specimen impact table assembly 10. A transparent water tank 2 is arranged inside the water tank support frame 1. In order to prevent the transparent water tank 2 from being damaged by vibrations generated during the experiment, a gap should be left between the transparent water tank 2 and the inner wall of the water tank support frame 1 when placed. A slide 3 is arranged in the vertical direction at the top of the water tank support frame 1. The slide 3 is fixed on the crossbeam at the upper part of the water tank support frame 1. In this embodiment, the slide 3 is a structure well known to those skilled in the art and will not be described in detail here. The jet control device 4 is installed on the slide 3. The jet control device 4 includes a shutter assembly 5 and a nozzle assembly 6. By adjusting the slide 3, the target distance between the nozzle assembly 6 and the specimen can be adjusted.

[0030] like Figure 3 — Figure 4 As shown, in order to obtain the best experimental effect, the shutter assembly 5 includes a first mounting base 12 and a gear pair 13 which are detachably connected to the slide 3. The first mounting base 12 is connected to the slide 3 by two bolts. The gear pair 13 includes two gears, one of which is connected to a servo motor 14, and the other gear is connected to a shutter shaft 15. A shutter plate 17 is provided at the end of the shutter shaft 15. The servo motor 14 drives the gear to rotate, thereby driving the shutter plate 17 to rotate. The servo motor 14 is installed on the first mounting base 12. A shutter shaft sleeve 16 for straightening is also sleeved on the outside of the shutter shaft 15. The shutter shaft sleeve 16 is clamped and connected to the first mounting base 12, and the shutter shaft 15 can rotate inside the shutter shaft sleeve 16. The nozzle assembly 6 is provided with a second mounting base 18 which is detachably connected to the slide 3. The second mounting base 18 is connected to the slide 3 by two bolts. A nozzle connecting pipe 19 is connected to the second mounting base 18. A nozzle 21 is provided at the end of the nozzle connecting pipe 19. The shutter piece 17 can be rotated to the bottom of the nozzle 21. A pressure sensor 20 for detecting pressure is provided on the nozzle connecting pipe 19. The upper end of the nozzle connecting pipe 19 is connected to a pump group. The high-pressure water flow from the pump group is released through the nozzle 21 via the nozzle connecting pipe 19.

[0031] like Figure 5As shown, the specimen impact platform assembly 10 is used to fix the specimen. It is located inside the transparent water tank 2 and is installed in a bottom-mounted manner. The specimen impact platform assembly 10 includes a modular base 9, an impact platform 8, and a specimen limiting plate 7 located above the impact platform 8. The modular base 9 is made of PP material. In order to install different functional modules and conduct different impact jet experiments, a number of bolt holes are provided on it. The specification of the bolt holes in this embodiment is M12. The specimen limiting plate 7 includes a base plate 22 connected to the impact platform 8. A through hole 23 for high-pressure water flow to pass through is provided in the middle of the base plate 22. A limiting block 24 for clamping the specimen is fixed on the base plate 22 by bolts. The limiting block 24 includes a pressing sheet 25 and a pressing plate 26. The pressing sheet 25 is in contact with the specimen. The pressing sheet 25 is made of nylon, and the pressing plate 26 is made of stainless steel. During the experiment, the specimen is placed on the specimen limiting plate 7, and the pressing plate 25 is in contact with the specimen. After the position of the specimen is adjusted, the pressing plate 26 is pressed onto the pressing plate 25, and the limiting block 24 is fixed to the base plate 22 by bolts. The pressing plate 25 is made of nylon material to effectively avoid wear between the specimen and the pressing plate 25 due to vibration during the impact test. At the same time, the pressing plate 26 is made of stainless steel to increase the strength of the pressing plate 25. The specimen limiting plate 7 is replaceable to meet the adaptation requirements of specimens of different sizes.

[0032] In this embodiment, the distance between the pressure sensor 20 and the nozzle 21 is 60 mm, and the pressure sensor 20 can accurately detect the injection pressure. During the experiment, the shutter piece 17 blocks the nozzle 21 in the closed state, and the cavitation jet cannot impact the specimen. After the pressure of the pump group is stable, the servo motor 14 drives the shutter piece 17 to rotate through the gear pair 13, the shutter is released, and the jet begins to impact the specimen. The servo motor 14 is controlled by a single-chip microcomputer, and the single-chip microcomputer is connected to a computer. The shutter opening and closing instructions are sent through the computer. The control program can set a test countdown after the shutter is released, and the shutter is automatically closed after the countdown ends. The shutter assembly 5 can accurately control the duration of the specimen being eroded. The shutter piece 17 is driven by the gear pair 13, and the deflection angle of the shutter piece 17 can reach 180°. After the shutter is released, the flow effect on the jet can be avoided and the high-speed photography field of view will not be blocked. In order to extend the service life of the shutter piece 17, the shutter piece 17 is made of stainless steel.

[0033] In order to eliminate the influence of water surface vortex on the experiment, a vortex-eliminating plate 27 is provided above the shutter assembly 5 and the nozzle assembly 6, and its vertical position can be adjusted up and down with the water level. The vortex-eliminating plate 27 is a double-layer structure, which is formed by bonding an upper EVA board and a lower sponge board. It can float up and down with the water level and eliminate the vortex formed on the water surface during the experiment.

[0034] In order to meet the convenience of operation during the cavitation jet experiment and the need for drainage after the experiment, a heightening frame 11 is also provided at the bottom of the water tank support frame 1, and the transparent water tank 2 is provided with a drain port 28 connected to a drain hose. After the test is completed, the drain port 28 can completely drain the water in the water tank. In this embodiment, the drain hose uses PVC parts, and bonding and plastic welding are used to achieve fixation and watertightness during installation. In order to speed up the emptying speed of the water in the transparent water tank 2, water can be directly pumped from the drain port 28 by a pump group. The inner diameter of the pumping pipe of the pump group is 25mm, and the minimum inner diameter of the bottom drainage pipeline is 30mm. The inner diameter of the external hose can be 40mm, so the flow of the drainage system can support the direct pumping of the pump group.

[0035] Working principle of the device: During the experiment, the specimen is fixed on the specimen impact table assembly 10, and the transparent water tank 2 is filled with water to simulate underwater working conditions. The slide 3 is adjusted to drive the injection control device 4 to move in the vertical direction to test the erosion effect of the cavitation jet at different target distances. The shutter assembly 5 can be controlled to accurately control the duration of the specimen being eroded, and the target target distance and test time with the best erosion effect can be obtained from the experiment.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An underwater cavitation jet test bench with a modular base, characterized in that: include: A water tank support frame (1), wherein a transparent water tank (2) is provided inside the water tank support frame (1), and a slide (3) is provided in the vertical direction at the top of the water tank support frame (1); An injection control device (4), the injection control device (4) is mounted on the slide table (3) for vertical displacement, and comprises a shutter assembly (5) and a nozzle assembly (6); A specimen impact platform assembly (10) is used to fix the specimen and is located inside the transparent water tank (2) in a bottom-mounted manner. The specimen impact platform assembly (10) comprises a modular base (9), an impact platform (8), and a specimen limiting plate (7) located above the impact platform (8).

2. The underwater cavitation jet test bench with a modular base according to claim 1, characterized in that: The shutter assembly (5) comprises a first mounting base (12) detachably connected to the slide (3) and a gear pair (13), wherein any gear in the gear pair (13) is connected to a servo motor (14), and the other gear is connected to a shutter shaft (15), and a shutter plate (17) is provided at the end of the shutter shaft (15).

3. The underwater cavitation jet test bench with a modular base according to claim 2, characterized in that: The shutter shaft (15) is externally sleeved with a shutter shaft sleeve (16), and the shutter shaft sleeve (16) is clamped and connected to the first mounting base (12).

4. The underwater cavitation jet test bench with a modular base according to claim 3, characterized in that: The nozzle assembly (6) is provided with a second mounting base (18) detachably connected to the slide (3); the second mounting base (18) is connected to a nozzle connecting pipe (19); a nozzle (21) is provided at the end of the nozzle connecting pipe (19); and the shutter plate (17) can be rotated to below the nozzle (21).

5. The underwater cavitation jet test bench with a modular base according to claim 4, characterized in that: The nozzle connecting pipe (19) is provided with a pressure sensor (20) for detecting pressure.

6. The underwater cavitation jet test bench with a modular base according to claim 1, characterized in that: The modular base (9) is made of PP material and is provided with a plurality of bolt holes.

7. The underwater cavitation jet test bench with a modular base according to claim 6, characterized in that: The specimen limiting plate (7) comprises a base plate (22) connected to the impact platform (8), a through hole (23) is provided in the middle of the base plate (22), a limiting block (24) for clamping the specimen is fixed to the base plate (22) by bolts, the limiting block (24) comprises a pressing sheet (25) and a pressing plate (26), and the pressing sheet (25) is in contact with the specimen.

8. The underwater cavitation jet test bench with a modular base according to claim 7, characterized in that: The pressing sheet (25) is made of nylon, and the pressing plate (26) is made of stainless steel.

9. The underwater cavitation jet test bench with a modular base according to claim 1, characterized in that: At A vortex elimination plate (27) whose position can be adjusted in the vertical direction is arranged above the shutter assembly (5) and the nozzle assembly (6); the vortex elimination plate (27) is a double-layer structure, wherein the upper layer is an EVA plate and the lower layer is a sponge plate.

10. The underwater cavitation jet test bench with a modular base according to claim 1, characterized in that: The transparent water tank (2) is provided with a drainage port (28) connected to a drainage hose, and a heightening frame (11) is provided at the bottom of the water tank support frame (1).

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