Hydrodynamic cavitation device combining cyclone and venturi

Abstract

The present application relates to the technical field of hydrodynamic cavitation, and particularly relates to a hydrodynamic cavitation device combining cyclone and venturi tube. The device comprises a cyclone, a venturi tube assembly and a throat adjusting assembly. The venturi tube assembly is internally provided with a converging channel, a throat channel and a diverging channel which are sequentially communicated. The converging channel is communicated with the cyclone at the liquid inlet end. The throat adjusting assembly comprises an adjusting mechanism and a plurality of throat sliders which are circumferentially spliced. The plurality of throat sliders are slidably arranged between the converging channel and the diverging channel and jointly surround the throat channel. The adjusting mechanism is connected with the throat sliders and is used to drive all the throat sliders to synchronously slide so as to change the flow area of the throat channel. The present application introduces the rotating flow field by the cyclone to enhance the fluid shear force, and uses the variable throat structure to adapt to the fluctuation of flow and pressure, so that the flexible control of cavitation intensity is realized, and the cavitation efficiency, mixing effect and process adaptability are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cavitation technology, and more particularly to a hydraulic cavitation device combining swirl and venturi tube. Background Technology

[0002] Hydraulic cavitation technology is widely used in processes such as emulsification, crushing, sterilization, and mixing. The Venturi tube is a commonly used cavitation generator, which increases liquid velocity and decreases pressure through a contraction-throat-expansion structure, thereby forming cavitation bubbles near the throat. However, the liquid flow is relatively flat before entering the Venturi tube, resulting in insufficient turbulence development and limited cavitation bubble generation efficiency, especially in high-viscosity or solid-containing media. Furthermore, the throat dimensions of traditional Venturi tubes are fixed, making it impossible to adjust the cavitation intensity according to process requirements, thus limiting their applicability. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to solve at least one of the technical problems mentioned above.

[0004] The solution to the technical problem of this invention is: a hydraulic cavitation device combining cyclone and venturi tube, comprising a cyclone separator, a venturi tube assembly, and a throat adjustment assembly. The venturi tube assembly has a contraction channel, a throat channel, and an expansion channel inside. The liquid inlet end of the contraction channel is connected to the cyclone separator, and the contraction channel is connected to the expansion channel through the throat channel. The throat adjustment assembly includes an adjustment mechanism and multiple throat sliders spliced ​​circumferentially. The multiple throat sliders are slidably disposed between the contraction channel and the expansion channel. The side of all the throat sliders facing the axial center of the venturi tube assembly together forms the throat channel. The adjustment mechanism is drivenly connected to at least one throat slider, and adjacent throat sliders are slidably connected, so that the adjustment mechanism can drive all the throat sliders to slide synchronously to change the flow cross-sectional area of ​​the throat channel.

[0005] As a further improvement to the above technical solution, a guide block is protruding on the first sidewall of the throat slider, and a guide groove is recessed on the second sidewall of the throat slider opposite to the first sidewall. An angle δ is formed between the first sidewall and the second sidewall. The number of throat sliders is set to n, where δ = (360 / n)°. In two adjacent throat sliders, the guide block of one throat slider is slidably embedded in the guide groove of the other throat slider.

[0006] As a further improvement to the above technical solution, the throat slider is provided with a chamfer on one end face facing the contraction channel and / or on one end face facing the expansion channel, and the angle of the chamfer is 50° to 60°.

[0007] As a further improvement to the above technical solution, the adjustment mechanism includes a drive pin and multiple driven pins. One of the throat sliders is provided with a first pin hole, and one end of the drive pin is fixedly inserted into the first pin hole. The venturi assembly is provided with an adjustment groove that cooperates with the drive pin. The other end of the drive pin is slidably inserted into the adjustment groove and extends to the outside of the venturi assembly. The remaining throat sliders are provided with second pin holes, and one end of each driven pin is fixedly inserted into the second pin hole. The venturi assembly is provided with multiple guide blind grooves that cooperate with the driven pins. The other end of each driven pin is slidably inserted into the guide blind groove. The extending directions of the adjustment groove and the guide blind groove have an inclination angle with the radial direction of the throat channel.

[0008] As a further improvement to the above technical solution, the Venturi tube assembly includes a contraction section and an expansion section. The contraction section is connected and fixed to the expansion section by fasteners. The contraction channel is disposed within the contraction section, and the expansion channel is disposed within the expansion section. A first slider groove is recessed on the end face of the contraction section facing the expansion section, and a second slider groove is recessed on the end face of the expansion section facing the contraction section. The first slider groove and the second slider groove are mated to form a receiving cavity, and all the throat sliders are slidably disposed within the receiving cavity.

[0009] As a further improvement to the above technical solution, the diameter of the contraction channel gradually decreases from the liquid inlet end to the liquid outlet end, and the contraction angle β of the contraction channel is 35° to 45°.

[0010] As a further improvement to the above technical solution, the diameter of the expansion channel gradually increases from the liquid inlet end to the liquid outlet end, and the expansion angle γ of the expansion channel is 7° to 15°.

[0011] As a further improvement to the above technical solution, the hydrocyclone includes a cylinder and a swirling section. The cylinder is connected and fixed to the contraction section by fasteners. The liquid outlet end of the cylinder is inserted into the liquid inlet end of the contraction section. The outer wall of the liquid outlet end of the cylinder and the inner wall of the liquid inlet end of the contraction section enclose a flow stabilizing cavity. The liquid outlet end of the cylinder is provided with a plurality of liquid inlet grooves that connect the inner cavity of the cylinder and the flow stabilizing cavity at intervals along the circumference. The swirling section is disposed on the outer wall of the liquid outlet end of the cylinder. The swirling section is provided with a plurality of swirling grooves that connect the contraction channel and the flow stabilizing cavity at intervals along the circumference. The extension direction of the swirling grooves has a deflection angle α between the radial direction of the cylinder and the radial direction of the cylinder. The deflection angle α is 25° to 35°.

[0012] As a further improvement to the above technical solution, the cross-sectional area of ​​the flow channel of the flow stabilizing cavity is larger than the cross-sectional area of ​​the liquid inlet flow channel of the cylinder, and the sum of the cross-sectional areas of all the liquid inlet slots is larger than the cross-sectional area of ​​the liquid inlet flow channel of the cylinder.

[0013] As a further improvement to the above technical solution, the Venturi assembly further includes a first sealing ring and a second sealing ring. A first sealing groove is formed on the surface of the first slider groove facing the throat slider. The first sealing ring is embedded in the first sealing groove and protrudes from the first sealing groove, abutting against one side axial end face of the throat slider. A second sealing groove is formed on the surface of the second slider groove facing the throat slider. The second sealing ring is embedded in the second sealing groove and protrudes from the second sealing groove, abutting against the other side axial end face of the throat slider.

[0014] The beneficial effects of this invention are as follows: the hydrocyclone imparts rotational momentum to the liquid before it enters the venturi assembly, enhancing turbulence; the venturi assembly, through its contraction-throat-expansion structure, achieves velocity changes and pressure reductions, inducing cavitation; the throat adjustment component, through the synchronous sliding of multiple circumferentially connected throat sliders, achieves continuous adjustment of the throat channel cross-sectional area, thereby flexibly controlling the cavitation intensity. The introduction of a rotating flow field by the hydrocyclone strengthens the liquid shearing and mixing effects; by adjusting the flow cross-sectional area of ​​the throat channel formed by the throat sliders, the cavitation intensity can be adjusted in real time according to actual flow rate and pressure requirements, broadening the adaptability of the cavitation device to different media and process requirements, and improving cavitation efficiency and process controllability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of a hydrocyclone according to one embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of a venturi assembly according to one embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the structure of the contraction section according to one embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the expansion section according to one embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of the throat slider according to one embodiment of the present invention.

[0021] Figure 7 This is a schematic diagram of the throat slider assembly installation according to one embodiment of the present invention.

[0022] Figure 8 This is a schematic diagram of the installation structure of the drive pin and the driven pin according to one embodiment of the present invention.

[0023] Reference numerals in the attached drawings: 100-cyclone separator, 110-cylinder, 111-inlet tank, 120-cyclone section, 121-cyclone channel, 130-flow stabilizing chamber, 200-venturi assembly, 210-contraction section, 211-contraction channel, 212-first slider groove, 213-first sealing groove, 220-expansion section, 221-expansion channel, 222-second slider groove, 223-second sealing groove, 230-first sealing ring, 240-second sealing ring, 30 0-Throat adjustment assembly, 310-Throat slider, 311-Guide block, 312-Guide groove, 313-First pin hole, 314-Second pin hole, 315-Chamfer, 320-Throat channel, 331-Drive pin, 332-Driven pin, 340-Adjustment groove, 341-Guide blind groove, 401-First quick connector, 402-Second quick connector, 403-Third quick connector, 404-Fourth quick connector, 405-First flange, 406-Second flange. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments have been briefly explained above. Obviously, the described drawings are only a part of the embodiments of the present invention, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0025] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this invention can be combined interactively without contradicting each other.

[0026] Currently, most common hydraulic cavitation devices use venturi tubes with fixed throat dimensions, which cannot adjust the cavitation intensity and are difficult to adapt to process requirements with different viscosities or different cavitation intensities. In addition, the liquid usually enters the venturi tube in a straight axial flow, resulting in insufficient turbulence development and limited cavitation bubble generation efficiency.

[0027] Therefore, this invention proposes a hydraulic cavitation device combining swirl and venturi, referring to... Figures 1-8It includes a hydrocyclone 100, a venturi assembly 200, and a throat adjustment assembly 300. The venturi assembly 200 has a contraction channel 211, a throat channel 320, and an expansion channel 221 inside. The liquid inlet end of the contraction channel 211 is connected to the hydrocyclone 100, and the contraction channel 211 is connected to the expansion channel 221 through the throat channel 320. The throat adjustment assembly 300 includes an adjustment mechanism and a plurality of circumferentially connected throat sliders 310. The plurality of throat sliders 310 are slidably disposed between the contraction channel 211 and the expansion channel 221. The side of all the throat sliders 310 facing the axial center of the venturi assembly 200 together forms the throat channel 320. The adjustment mechanism is drivenly connected to at least one throat slider 310, and two adjacent throat sliders 310 are slidably connected, so that the adjustment mechanism can drive all the throat sliders 310 to slide synchronously to change the flow cross-sectional area of ​​the throat channel 320.

[0028] The hydrocyclone 100 imparts rotational momentum to the liquid before it enters the venturi tube, enhancing turbulence. The venturi tube assembly 200 induces cavitation by varying flow velocity and reducing pressure through a contraction-throat-expansion structure. The throat adjustment assembly 300 achieves continuous adjustment of the cross-sectional area of ​​the throat channel 320 through the synchronous sliding of multiple circumferentially connected throat sliders 310, thereby flexibly controlling the cavitation intensity. The introduction of a rotating flow field by the hydrocyclone 100 enhances the liquid shearing and mixing effects. By adjusting the flow cross-sectional area of ​​the throat channel 320 enclosed by the throat sliders 310, the cavitation intensity can be adjusted in real time according to actual flow rate and pressure requirements, broadening the adaptability of the cavitation device to different media and process requirements, and improving cavitation efficiency and process controllability.

[0029] During operation, the liquid first enters the hydrocyclone 100, where it is guided by the internal structure to change from axial flow to high-speed rotational flow. The rotating liquid enters the contraction channel 211 of the venturi assembly 200, where the liquid velocity increases and the static pressure decreases. The liquid reaches its maximum velocity and lowest pressure when flowing through the throat channel 320 formed by multiple throat sliders 310, generating a large number of cavitation bubbles in the throat region. The liquid with a large number of cavitation bubbles then enters the expansion channel 221, where the velocity decreases and the pressure rises. The cavitation bubbles collapse violently under the pressure of the surrounding liquid, generating microjets and high shear force, achieving efficient emulsification or dispersion of the liquid. When process requirements change, the throat sliders 310 can be moved by the adjustment mechanism to change the cross-sectional area of ​​the throat channel 320, thereby achieving real-time adjustment of the cavitation intensity.

[0030] When adjusting or bearing fluid pressure, the connection between the throat sliders 310 may become misaligned, jammed, or leak, affecting the shape accuracy and sealing of the throat channel 320. Therefore, in one embodiment, a guide block 311 protrudes from the first sidewall of the throat slider 310, and a guide groove 312 is recessed on the second sidewall of the throat slider 310 opposite to the first sidewall. An angle δ is formed between the first and second sidewalls. The number of throat sliders 310 is set to n, where δ = (360 / n)°. In two adjacent throat sliders 310, the guide block 311 of one throat slider 310 is slidably embedded in the guide groove 312 of the other throat slider 310. n is an integer greater than or equal to 3. In this example, the number of throat sliders 310 is 8, so δ = (360 / 8)° = 45°. The interlocking structure of the guide block 311 and the guide groove 312 ensures that adjacent throat sliders 310 can only slide relative to each other along the extension direction of the guide groove 312, preventing misalignment. The included angle δ design allows all throat sliders 310 to tightly enclose a complete annular throat channel 320. The structure is self-centering, ensuring that all throat sliders 310 always maintain the correct relative position and splicing shape during extension and retraction, preventing fluid leakage from the lateral gaps between throat sliders 310, and ensuring the reliability and sealing of throat adjustment.

[0031] Direct impact of fluid on the edge of the throat slider 310 generates significant local resistance loss, affecting cavitation efficiency. Therefore, in one embodiment, the throat slider 310 has a chamfer 315 on one end face facing the contraction channel 211 and / or on one end face facing the expansion channel 221, with the chamfer 315 having an angle of 50° to 60°. When the emulsion enters the throat channel 320 from the contraction channel 211, or flows from the throat channel 320 into the expansion channel 221, the chamfer 315 acts as a buffer variable cross-section channel. The liquid can flow along the surface of the chamfer 315, avoiding abrupt passage through a 90° abrupt cross-section channel, allowing for a smooth transition, preventing flow separation, reducing local resistance loss, and enabling more fluid energy to be used for cavitation.

[0032] When the adjusting mechanism drives all throat sliders 310 to move synchronously, if the motion guidance is inaccurate, gaps may appear in the throat channel 320, affecting the flow field uniformity and sealing. Therefore, in one embodiment, the adjusting mechanism includes a drive pin 331 and multiple driven pins 332. One of the throat sliders 310 is provided with a first pin hole 313. One end of the drive pin 331 is fixedly inserted into the first pin hole 313. The venturi assembly 200 is provided with an adjusting groove 340 that cooperates with the drive pin 331. The other end of the drive pin 331 is slidably inserted into the adjusting groove 340 and extends to the outside of the venturi assembly 200. The throat slider 310 is provided with a second pin hole 314. One end of the driven pin 332 is fixedly inserted into the second pin hole 314. The venturi assembly 200 is provided with a plurality of guide blind grooves 341 that cooperate with the driven pin 332. The other end of the driven pin 332 is slidably inserted into the guide blind groove 341. The extending directions of the adjusting groove 340 and the guide blind groove 341 have an inclination angle with the radial direction of the throat channel 320. When the drive pin 331 slides within the inclined adjustment groove 340, it forces the throat slider 310 to generate circumferential rotation and radial displacement components. Since all throat sliders 310 are interlocked end-to-end with the guide rail block 311 and guide rail groove 312 and are constrained by the inclined guide blind groove 341, all throat sliders 310 are driven to synchronously rotate radially contract or expand, realizing single-point drive and multi-point synchronous scaling, which is simple to operate and highly accurate. The driven pin 332 cooperates with the guide blind groove 341 to provide precise guidance for the remaining throat sliders 310. The pin and groove cooperation structure is simple and reliable, easy to process and assemble, and easy to achieve sealing. In this example, both the adjusting groove 340 and the guide blind groove 341 are oblong holes. When the drive pin 331 slides to the upper stop a, all eight throat sliders 310 slide outward together to their limit positions, with the throat size L reaching a maximum of approximately 15 mm. When the drive pin 331 slides to the lower stop b, all eight throat sliders 310 slide inward together to their limit positions, with the throat size L reaching a minimum of approximately 1 mm. During the design process, the upper and lower limit values ​​of the throat size L can be set by changing parameters such as the tilt angle and center distance of the adjusting groove 340 and the guide blind groove 341. During the adjustment process, the side of the throat slider 310 actually acts as part of the throat channel 320. With the help of the engagement of the guide block 311 and the guide groove 312, the side of the throat slider 310 is tightly fitted, which can prevent liquid from leaking from the contact surface between the throat sliders 310 and ensure the sliding linkage of all throat sliders 310. Of course, it can be seen that after the throat sliders 310 are assembled into a whole, the shape of the throat is actually an octagonal structure rather than a circle. If the throat channel 320 is to be closer to a circle, the number of throat sliders 310 can be increased.

[0033] If the Venturi assembly 200 is a one-piece structure, the installation, disassembly, and maintenance of the throat slider 310 will be extremely difficult, and it will be difficult to guarantee the machining accuracy of the throat slider 310 cavity. Therefore, in one embodiment, the Venturi assembly 200 includes a contraction section 210 and an expansion section 220. The contraction section 210 is connected and fixed to the expansion section 220 by fasteners. The contraction channel 211 is disposed within the contraction section 210, and the expansion channel 221 is disposed within the expansion section 220. A first slider groove 212 is recessed on the end face of the contraction section 210 facing the expansion section 220, and a second slider groove 222 is recessed on the end face of the expansion section 220 facing the contraction section 210. The first slider groove 212 and the second slider groove 222 are mated to form a receiving cavity, and all the throat sliders 310 are slidably disposed within the receiving cavity. The separate constriction section 210 and expansion section 220 facilitate the insertion, alignment, and fixation of the throat slider 310, simplifying the assembly process. The first slider groove 212 and the second slider groove 222 together form a precise mounting and positioning reference for the throat slider 310, ensuring the coaxiality of the throat channel 320 with the constriction channel 211 and the expansion channel 221. The modular design facilitates the individual replacement or maintenance of the constriction section 210, expansion section 220, or throat slider 310 assembly, reducing usage costs. In this example, the constriction section 210 has a first quick connector 401 at the end facing the expansion section 220, and the expansion section 220 has a second quick connector 402 at the end facing the constriction section 210. The first quick connector 401 and the second quick connector 402 are quickly locked together by a clamp. The liquid outlet end of the expansion section 220 has a third quick connector 403 for discharging liquid.

[0034] If the contraction angle of the contraction channel 211 is too large, the liquid flow rate increases too rapidly, easily leading to flow separation and significant local pressure loss; if the contraction angle is too small, the channel becomes too long, increasing the size and weight of the equipment. Therefore, in one embodiment, the diameter of the contraction channel 211 gradually decreases from the inlet end to the outlet end, and the contraction angle β of the contraction channel 211 is 35° to 45°. Within this angle range, the liquid can accelerate smoothly, maintaining an adherent flow state and avoiding premature separation that generates eddies; effective flow rate enhancement is achieved within a reasonable structural length, balancing cavitation performance and equipment compactness; and smaller pressure loss allows more energy to be used for throat cavitation, improving energy utilization efficiency.

[0035] If the expansion angle of the expansion channel 221 is too large, the deceleration process will be too violent, easily leading to flow separation and backflow, disrupting the stable collapse of cavitation bubbles, and causing pressure fluctuations. If the expansion angle is too small, the channel will be too long, resulting in slow pressure recovery. Therefore, in one embodiment, the diameter of the expansion channel 221 gradually increases from the inlet end to the outlet end, and the expansion angle γ of the expansion channel 221 is 7° to 15°. Within this angle range, the liquid can decelerate smoothly, and the pressure can be gradually recovered, effectively maintaining the adhesion state of the flow and preventing separation; it is conducive to the collapse of cavitation bubbles in a stable flow field, resulting in more concentrated and uniform energy release; and pressure recovery is achieved within a reasonable length, balancing performance and size.

[0036] If the liquid enters the Venturi assembly 200 with axial flow, the shearing effect between fluid particles is weak, the turbulence intensity is low, which is not conducive to the formation and development of cavitation nuclei, and the cavitation efficiency is limited. Therefore, in one embodiment, the hydrocyclone 100 includes a cylinder 110 and a swirling section 120. The cylinder 110 is connected and fixed to the contraction section 210 by fasteners. The liquid outlet end of the cylinder 110 is inserted into the liquid inlet end of the contraction section 210. The outer wall of the liquid outlet end of the cylinder 110 and the inner wall of the liquid inlet end of the contraction section 210 enclose a flow stabilizing cavity 130. The liquid outlet end of the cylinder 110 has multiple openings spaced circumferentially. A liquid inlet groove 111 connects the inner cavity of the cylinder 110 with the flow stabilizing cavity 130. A swirling section 120 is disposed on the outer wall of the liquid outlet end of the cylinder 110. Multiple swirling grooves 121, spaced circumferentially along the swirling section 120, connect the contraction channel 211 with the flow stabilizing cavity 130. The extension direction of the swirling grooves 121 has a deflection angle α between it and the radial direction of the cylinder 110, where α = 25°–35°. After passing through the swirling grooves 121 from the flow stabilizing cavity 130, the liquid gains a certain circumferential rotational momentum. Note that the deflection angle α is small, and the liquid still has a large axial velocity component after passing through the swirling grooves 121. This causes the liquid to flow forward while simultaneously rotating circumferentially as it enters the venturi assembly 200, enhancing the shearing effect between the liquids and rapidly developing turbulence. This facilitates the generation of cavitation bubbles at the throat of the venturi assembly 200. In this example, the inlet end of the cylinder 110 is provided with a fourth quick connector 404 for inputting liquid, the other end of the cylinder 110 is provided with a first flange 405, and the end of the contraction section 210 facing the cylinder 110 is provided with a second flange 406. The first flange 405 and the second flange 406 are locked together by bolts and nuts.

[0037] When liquid flows through the inlet channel 111 between the inner cavity of the cylinder 110 and the flow stabilizing cavity 130, unnecessary pressure loss may occur, reducing the effective pressure energy entering the venturi assembly 200. Therefore, in one embodiment, the cross-sectional area of ​​the flow stabilizing cavity 130 is larger than the cross-sectional area of ​​the inlet end flow channel of the cylinder 110, and the sum of the cross-sectional areas of all inlet channels 111 is larger than the cross-sectional area of ​​the inlet end flow channel of the cylinder 110. The flow stabilizing cavity 130 provides sufficient space for buffering, making the liquid velocity distribution more uniform; the total area of ​​the inlet channels 111 is larger than the inlet area, avoiding significant throttling of the liquid during the distribution stage and reducing pressure loss; ensuring that most of the fluid pressure energy is transferred to the vortex channel 121 and the subsequent venturi assembly 200 for generating vortex and cavitation, improving energy conversion efficiency.

[0038] A gap leak may occur between the movable throat slider 310 and the fixed flow channel, causing energy loss and affecting the vacuum level. Therefore, in one embodiment, the Venturi assembly 200 further includes a first sealing ring 230 and a second sealing ring 240. The first slider groove 212 has a first sealing groove 213 on its surface facing the throat slider 310. The first sealing ring 230 is embedded in the first sealing groove 213 and protrudes from the first sealing groove 213, abutting against one side axial end face of the throat slider 310. The second slider groove 222 has a second sealing groove 223 on its surface facing the throat slider 310. The second sealing ring 240 is embedded in the second sealing groove 223 and protrudes from the second sealing groove 223, abutting against the other side axial end face of the throat slider 310. The axial depth of the receiving cavity is slightly greater than the thickness of the throat slider 310 to ensure that the slider can slide while maintaining a seal through the sealing ring. The first sealing ring 230 and the second sealing ring 240 press against the axial end face of the throat slider 310 from both sides to form a reliable axial seal and prevent liquid leakage along the end face of the throat slider 310. The elastic compensation capability of the sealing ring can adapt to the small displacement and end face unevenness during the sliding process of the throat slider 310 and maintain the sealing effectiveness. The sealing function is integrated into the slider groove, which has a compact structure, does not occupy additional space, and is convenient for sealing installation during assembly.

[0039] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A hydraulic cavitation device combining vortex and venturi techniques, characterized in that, The device includes a hydrocyclone, a venturi assembly, and a throat adjustment assembly. The venturi assembly internally comprises a contraction channel, a throat channel, and an expansion channel. The inlet end of the contraction channel is connected to the hydrocyclone, and the contraction channel is connected to the expansion channel via the throat channel. The throat adjustment assembly includes an adjustment mechanism and multiple circumferentially connected throat sliders. These throat sliders are slidably disposed between the contraction channel and the expansion channel. The sides of all the throat sliders facing the axial center of the venturi assembly together form the throat channel. The adjustment mechanism is driven by at least one throat slider, and adjacent throat sliders are slidably connected, allowing the adjustment mechanism to drive all throat sliders to slide synchronously, thereby changing the throat channel. The flow cross-sectional area of ​​the throat channel; the adjustment mechanism includes a drive pin and multiple driven pins, one of the throat sliders is provided with a first pin hole, one end of the drive pin is fixedly inserted into the first pin hole, the venturi assembly is provided with an adjustment groove that cooperates with the drive pin, the other end of the drive pin is slidably inserted into the adjustment groove and extends to the outside of the venturi assembly, the remaining throat sliders are provided with second pin holes, one end of each driven pin is fixedly inserted into the second pin hole, the venturi assembly is provided with multiple guide blind grooves that cooperate with the driven pins, the other end of each driven pin is slidably inserted into the guide blind groove, the extension direction of the adjustment groove and the guide blind groove has an inclination angle with the radial direction of the throat channel.

2. The hydraulic cavitation device combining vortex and venturi tube according to claim 1, characterized in that, A guide block protrudes from the first sidewall of the throat slider, and a guide groove is recessed on the second sidewall of the throat slider opposite to the first sidewall. An angle δ is formed between the first sidewall and the second sidewall. The number of throat sliders is set to n, where δ = (360 / n)°. In two adjacent throat sliders, the guide block of one throat slider is slidably embedded in the guide groove of the other throat slider.

3. A hydraulic cavitation device combining vortex and venturi tube according to claim 1, characterized in that, The throat slider has a chamfer on one end face facing the contraction channel and / or on one end face facing the expansion channel, and the angle of the chamfer is 50° to 60°.

4. A hydraulic cavitation device combining vortex and venturi tube according to claim 1, characterized in that, The venturi assembly includes a contraction section and an expansion section. The contraction section is connected and fixed to the expansion section by fasteners. The contraction channel is disposed within the contraction section, and the expansion channel is disposed within the expansion section. A first slider groove is recessed on the end face of the contraction section facing the expansion section, and a second slider groove is recessed on the end face of the expansion section facing the contraction section. The first slider groove and the second slider groove are mated to form a receiving cavity, and all the throat sliders are slidably disposed within the receiving cavity.

5. A hydraulic cavitation device combining vortex and venturi tube according to claim 4, characterized in that, The diameter of the contraction channel gradually decreases from the inlet end to the outlet end, and the contraction angle β of the contraction channel is 35° to 45°.

6. A hydraulic cavitation device combining swirl and venturi tube according to claim 4, characterized in that, The diameter of the expansion channel gradually increases from the inlet end to the outlet end, and the expansion angle γ of the expansion channel is 7° to 15°.

7. A hydraulic cavitation device combining vortex and venturi tube according to claim 4, characterized in that, The hydrocyclone includes a cylindrical body and a swirling section. The cylindrical body is connected and fixed to the contraction section by fasteners. The liquid outlet end of the cylindrical body is inserted into the liquid inlet end of the contraction section. The outer wall of the liquid outlet end of the cylindrical body and the inner wall of the liquid inlet end of the contraction section enclose a flow stabilizing cavity. The liquid outlet end of the cylindrical body is provided with a plurality of liquid inlet grooves that connect the inner cavity of the cylindrical body and the flow stabilizing cavity at intervals along the circumference. The swirling section is disposed on the outer wall of the liquid outlet end of the cylindrical body. The swirling section is provided with a plurality of swirling grooves that connect the contraction channel and the flow stabilizing cavity at intervals along the circumference. The extension direction of the swirling grooves has a deflection angle α between the radial direction of the cylindrical body and the radial direction of the cylindrical body. The deflection angle α is 25° to 35°.

8. A hydraulic cavitation device combining swirl and venturi tube according to claim 7, characterized in that, The cross-sectional area of ​​the flow channel in the stabilizing cavity is larger than the cross-sectional area of ​​the inlet flow channel of the cylinder, and the sum of the cross-sectional areas of all the inlet grooves is larger than the cross-sectional area of ​​the inlet flow channel of the cylinder.

9. A hydraulic cavitation device combining swirl and venturi tube according to claim 4, characterized in that, The Venturi assembly further includes a first sealing ring and a second sealing ring. A first sealing groove is formed on the surface of the first slider groove facing the throat slider. The first sealing ring is embedded in the first sealing groove and protrudes from the first sealing groove, abutting against one side axial end face of the throat slider. A second sealing groove is formed on the surface of the second slider groove facing the throat slider. The second sealing ring is embedded in the second sealing groove and protrudes from the second sealing groove, abutting against the other side axial end face of the throat slider.

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