CN115501848A - Strong-shear type annular jet cavitation generation and monitoring device - Google Patents

Abstract

The invention discloses a strong shear type annular jet cavitation generation and monitoring device, which belongs to the field of cavitation generators and comprises a rectifier tube, wherein one end of the rectifier tube is provided with a flow outlet tube in a penetrating way, the other end of the rectifier tube is detachably connected with a backflow component, a straight-through section, a contraction section and a back pressure section are sequentially arranged in the rectifier tube from one side to the other side, the inner wall of the contraction section and the periphery of the flow outlet tube form a tapered annular cavity, and the backflow component specifically comprises: the backward flow seat, and backward flow seat one end fixedly connected with screw thread seat, the side center fixedly connected with cock stem of backward flow seat, and the cock stem insert in the backpressure section and rather than the phase-match, the hickey has been seted up to the rectifier tube other end, can dismantle in the screw thread seat screw in hickey, the one end that the backward flow seat was kept away from to the cock stem has seted up the circular slot. According to the invention, the back jet flow is continuously adjusted to change the back jet flow, so that the stress state of the fluid is strongly changed, and the cavitation effect is better.

Description

Strong-shear type annular jet cavitation generation and monitoring device

Technical Field

The invention relates to a cavitation generator, in particular to a strong shear type annular jet cavitation generating and monitoring device.

Background

Cavitation is the process of formation, development and collapse of vapor or gas cavitation bubbles that occur within a liquid or at a liquid-solid interface when the local pressure within the liquid is reduced to the saturated vapor pressure of the liquid. For a long time, people are dedicated to preventing cavitation and reducing the harm of cavitation. However, in the cavitation flow, the cavitation bubbles are generated in the process of primary generation, development and collapse, and local high temperature, high pressure, strong shock waves, high-speed micro-jet and the like can be effectively applied to the aspects of environmental protection engineering, biological engineering, food industry and the like, such as sewage treatment, sterilization, disinfection, emulsification processing and the like.

The strong shear type cavitation generator is widely applied in cavitation generating equipment, and mainly changes the stress state of fluid according to strong shear to cause cavitation at the defect position inside the fluid or at the interface.

The prior art has the following problems: if the back jet is invariable, the stress state of the fluid is not changed strongly, so that the cavitation effect is not good enough. Therefore, the person skilled in the art provides a strong shear type annular jet cavitation generation and monitoring device to solve the problems mentioned in the background art.

Disclosure of Invention

The invention aims to provide a strong-shear type annular jet cavitation generation and monitoring device, which changes the back jet by continuously adjusting the back jet, so that the stress state of the fluid is strongly changed, the cavitation effect is better, and the problems in the background art are solved.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a strong formula annular jet cavitation of cutting takes place and monitoring devices, includes the rectifier tube, rectifier tube one end is run through and is provided with out the flow tube, and the rectifier tube other end can be dismantled and be connected with the backward flow subassembly, direct section, shrink section and backpressure section have been seted up in proper order to one side to the opposite side in the rectifier tube, and shrink section inner wall and the peripheral convergent ring-shaped cavity that forms of flow tube.

As a further scheme of the invention: the reflow component specifically comprises: the base that flows back, and the base one end fixedly connected with screw thread seat that flows back, the side center fixedly connected with cock stem of the base that flows back, and the cock stem insert in the backpressure section and rather than the phase-match, the hickey has been seted up to the rectifier tube other end, can dismantle in the screw thread seat screw in hickey, the one end that the backward flow seat was kept away from to the cock stem has seted up the circular slot, and circular slot inner wall intermediate position fixedly connected with baffle, the arc groove of two symmetries is separated into with the circular slot to the baffle, and the unsmooth elastic membrane of arc inslot wall fixedly connected with, swing joint has rather than assorted plush copper in the arc groove that can unsmooth elastic membrane one side, and plush copper one side is equipped with actuating mechanism and is used for driving the plush copper to remove, two another when plush copper one gos forward, the two staggers each other.

As a still further scheme of the invention: the driving mechanism specifically includes: the driving rod and the driving block, driving rod one end and plush copper fixed connection, and the driving rod other end runs through screw thread seat and cock stem and extends to the inside drive chamber of seting up of backward flow seat, the driving block is located drive intracavity portion and with driving rod other end fixed connection, and the driving block below is equipped with the power spare and is used for driving the driving block and removes.

As a still further scheme of the invention: the power part specifically includes: the rotary disc is located below the driving block, three rotating arms which are evenly distributed are fixedly connected to the outer side face of the rotary disc, one end of each rotating arm is rotatably connected with a roller, a step is formed in the bottom end face of the driving block, a driving motor is embedded in the inner wall of the driving cavity, and an output shaft of the driving motor is fixedly connected with the center of the side face of the rotary disc.

As a still further scheme of the invention: the outer surface of the concave-convex elastic membrane is fixedly connected with a plurality of uniformly distributed particle bulges.

As a still further scheme of the invention: rectifier tube one end fixedly connected with seals the dish, and seals dish side center fixedly connected with tighrening ring, it runs through the tighrening ring and seals the dish and extends to the rectifier intraduct to go out flow tube one end, and tighrening ring lateral surface threaded connection has at least three fastening bolt to be used for fixed outflow tube position.

As a still further scheme of the invention: and a sealing ring is embedded between the inside of the sealing disc and the outer wall of the outflow pipe.

As a still further scheme of the invention: still include a plurality of ultrasonic transducer, a plurality of ultrasonic transducer is fixed in proper order along play flow tube length direction, and ultrasonic transducer's transmitting terminal and receiving terminal install in the week side of play flow tube correspondingly.

As a still further scheme of the invention: still include the high-pressure feed pipe, the high-pressure feed pipe communicates with the rectifier tube is perpendicular.

As a still further scheme of the invention: the outer diameter of the flow outlet pipe is smaller than the inner diameter of the rectifying pipe.

Compared with the prior art, the invention has the beneficial effects that:

1. this application sets up two continuous alternation's unsmooth elastic membrane at the striking face through the backward flow subassembly that sets up, can the continuation adjust back jet and make it appear changing, and then lead to fluidic stress state change strong to make the cavitation effect better.

2. This application can push away the actuating lever through the actuating mechanism who sets up intermittently and advance, and then the drive plush copper advances and forms the concave elastic membrane that can be unsmooth of convex, and when actuating mechanism did not promote the actuating lever and advance, but high-speed efflux will impact concave elastic membrane into with concave elastic membrane, and the two circulation is in turn, has effectively reached the constantly alternate purpose of striking face.

3. This application is protruding through the granule that sets up, can be when the impact of receiving high-speed efflux, carries out the change of each angle to the direction of the efflux that reflects back to better messenger's efflux appears changing.

4. This application can adjust the length that the outlet flow pipe stretched into the rectifier intraduct through the tighrening ring and the fastening bolt that set up, and then adjusts convergent toroidal cavity's length to this realizes the regulation to the velocity of flow when high-speed efflux jets out from convergent toroidal cavity.

5. When the staff was when the installation backward flow subassembly, only need insert the gag lever post backpressure section, again with screw thread seat screw in hickey can, this kind of mounting means not only be convenient for install with dismantle, still can be through the degree of depth in the adjustment screw thread seat screw in hickey, adjust the length that the gag lever post inserted the backpressure section, and then the distance of adjustment backpressure section port and gag lever post end (the actual working length of backpressure section promptly), actual working length is longer more, the backpressure is less, the staff can adjust gag lever post depth of insertion as required.

Drawings

FIG. 1 is a schematic structural diagram of a strong shear type annular jet cavitation generation and monitoring device;

FIG. 2 is a schematic structural diagram of a backflow component in a strong shear type annular jet cavitation generation and monitoring device;

FIG. 3 is an enlarged view of A in FIG. 2 of a strong shear type annular jet cavitation generation and monitoring device;

FIG. 4 is an enlarged view of B in FIG. 2 of a strong shear type annular jet cavitation generation and monitoring device;

FIG. 5 is a combination view of a circular groove and a partition plate in the strong shear type annular jet cavitation generation and monitoring device;

FIG. 6 is a combination view of two raised heads of a strong shear type annular jet cavitation generation and monitoring device;

FIG. 7 is a combination view of a fastening ring and a fastening bolt in a strong shear type annular jet cavitation generation and monitoring device;

FIG. 8 is a combined view of an outlet tube and an ultrasonic transducer in the strong shear type annular jet cavitation generation and monitoring device.

In the figure: 1. a rectifier tube; 2. a return seat; 3. a straight-through section; 4. a contraction section; 5. a back pressure section; 6. sealing the disc; 7. a fastening ring; 8. a discharge pipe; 9. an ultrasonic transducer; 901. a transmitting end; 902. a receiving end; 10. a seal ring; 11. a high pressure feed pipe; 12. a threaded interface; 13. a threaded seat; 14. a stopper rod; 15. a drive chamber; 16. a drive rod; 17. a raised head; 18. a circular groove; 19. a concavo-convex elastic film; 20. a drive motor; 21. rotating the disc; 22. a rotating arm; 23. a roller; 24. a drive block; 25. a step; 26. fastening a bolt; 27. a partition plate; 28. the particles are raised.

Detailed Description

In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.

Referring to fig. 1 to 8, in an embodiment of the present invention, a strong shear type annular jet cavitation generation and monitoring device includes a rectifier tube 1, one end of the rectifier tube 1 is provided with a flow outlet tube 8 in a penetrating manner, and the other end of the rectifier tube 1 is detachably connected with a backflow component, a straight section 3, a contraction section 4 and a back pressure section 5 are sequentially disposed inside the rectifier tube 1 from one side to the other side, and a tapered annular cavity is formed between an inner wall of the contraction section 4 and the periphery of the flow outlet tube 8. This application is through the detachable backward flow subassembly that sets up, can the continuation adjust back jet flow and make it appear changing, and then lead to fluidic stress state to change strongly to make the cavitation effect better.

In this embodiment: the reflow assembly specifically includes: backward flow seat 2, and backward flow seat 2 one end fixedly connected with screw thread seat 13, the side center fixedly connected with cock stem 14 of backward flow seat 2, and cock stem 14 inserts in backpressure section 5 and rather than the phase-match, hickey 12 has been seted up to the rectifier tube 1 other end, screw thread seat 13 screw in is dismantled in hickey 12, round slot 18 has been seted up to the one end that cock stem 14 kept away from backward flow seat 2, and round slot 18 inner wall intermediate position fixedly connected with baffle 27, baffle 27 separates into two symmetrical arc grooves with round slot 18, and arc inslot wall fixedly connected with can unsmooth elastic membrane 19, swing joint has rather than assorted plush 17 in the arc groove of unsmooth elastic membrane 19 one side, and plush 17 one side is equipped with actuating mechanism and is used for driving plush 17 to remove, another retreats when two plush 17 one advances, the two stagger each other. When one driving raised head 17 moves forward, the driving raised head 17 pushes the corresponding concave-convex elastic membrane 19 to jack up along the corresponding arc groove to form a convex shape, at the moment, the other driving raised head 17 cannot push the concave-convex elastic membrane 19 because of not moving forward, the high-speed jet flow washes the corresponding concave-convex elastic membrane 19 into a concave shape, the convex concave-convex elastic membrane 19 and the concave-convex elastic membrane 19 are continuously alternated, the high-speed jet flow collides with the concave-convex elastic membrane 19 to generate a back jet flow, and the collision surface is continuously alternated, so that the back jet flow is continuously changed, the stress state of the fluid is strongly changed, and the cavitation effect is better.

In this embodiment: the drive mechanism specifically includes: the driving rod 16 is fixedly connected with the driving block 24, one end of the driving rod 16 is fixedly connected with the raised head 17, the other end of the driving rod 16 penetrates through the threaded seat 13 and the plug rod 14 and extends into the driving cavity 15 formed in the backflow seat 2, the driving block 24 is located in the driving cavity 15 and is fixedly connected with the other end of the driving rod 16, and a power piece is arranged below the driving block 24 to drive the driving block 24 to move. The driving mechanism can intermittently push the driving rod 16 to advance, and further drives the raised head 17 to advance to form the convex concave-convex elastic membrane 19, and when the driving mechanism does not push the driving rod 16 to advance, the high-speed jet flow can impact the concave-convex elastic membrane 19 into a concave shape, and the concave-convex elastic membrane are circularly alternated, so that the purpose of continuously and alternately changing the impact surface is effectively achieved.

In this embodiment: the power part specifically includes: the outer side face of the rotating disc 21 is fixedly connected with three rotating arms 22 which are uniformly distributed, one end of each rotating arm 22 is rotatably connected with a roller 23, the bottom end face of each driving block 24 is provided with a step 25, the inner wall of the driving cavity 15 is embedded with a driving motor 20, and the output shaft of each driving motor 20 is fixedly connected with the center of the side face of the rotating disc 21. The power member is arranged to intermittently drive the drive rod 16 forward.

In this embodiment: the outer surface of the concavo-convex elastic membrane 19 is fixedly connected with a plurality of evenly distributed particle bulges 28. The particle protrusions 28 are arranged to change the direction of the reflected back jet at various angles upon receiving the impact of the high velocity jet, thereby better modifying the back jet.

In this embodiment: 1 one end fixedly connected with of rectifying tube seals dish 6, and seals dish 6 side center fixedly connected with tighrening ring 7, goes out 8 one end of flowing pipe and runs through tighrening ring 7 and seal dish 6 and extend to rectifying tube 1 inside, and 7 lateral surface threaded connection of tighrening ring has at least three fastening bolt 26 to be used for fixed flowing pipe 8 positions. In this arrangement, the length of the outlet pipe 8 extending into the rectifying pipe 1 can be adjusted, and the length of the tapered annular cavity can be adjusted.

In this embodiment: a sealing ring 10 is embedded between the inside of the sealing disc 6 and the outer wall of the outflow pipe 8. This arrangement improves the sealing between the sealing disc 6 and the outlet pipe 8.

In this embodiment: the ultrasonic flow meter is characterized by further comprising a plurality of ultrasonic transducers 9, the ultrasonic transducers 9 are sequentially fixed along the length direction of the flow outlet pipe 8, and the transmitting end 901 and the receiving end 902 of each ultrasonic transducer 9 are correspondingly installed on the peripheral side of the flow outlet pipe 8. The ultrasonic transducer 9 is connected with an external cavitation monitoring device, and can monitor the cavitation process in real time. The external cavitation monitoring device comprises an amplifier, an A/D converter, a microprocessor and an output unit.

In this embodiment: the water supply device also comprises a high-pressure water supply pipe 11, and the high-pressure water supply pipe 11 is vertically communicated with the rectifying pipe 1. The high-pressure water supply pipe 11 feeds high-speed jet flow into the rectifying pipe 1.

In this embodiment: the outer diameter of the outlet pipe 8 is smaller than the inner diameter of the rectifier tube 1. This arrangement ensures that a gap exists between the outlet tube 8 and the rectifying tube 1 to form an annular flow passage.

The working principle of the invention is as follows: during the use, send into high-speed efflux through high-pressure feed pipe 11 to rectifier 1 inside, high-speed efflux gets into the straight section 3 of rectifier 1, from the annular runner between play flow pipe 8 and rectifier 1 and gets into contraction section 4, and contraction section 4 inner wall and play flow pipe 8 periphery form the convergent ring cavity, because the runner cross-section of convergent ring cavity diminishes gradually, the velocity of flow of the high-speed efflux that flows through the convergent ring cavity further improves, afterwards, high-speed efflux jets out the space between play flow pipe 8 and the backpressure section 5 in the cavitation room namely contraction section 4 with high-speed spouting, because the hindrance effect of the backward flow subassembly in the backpressure section 5, working fluid can't continue to flow downstream, the fluid can flow upstream backward. The reverse back jet meets the high-speed jet ejected from the tapered annular cavity in the cavitation chamber to form strong shearing action. The vortex structure in the shear layer, especially the turbulent coherent structure with vortex quantity aggregation and turbulent pressure pulsation appear in the shear layer, so that the local minimum pressure at the center of a vortex core in a flow field far reaches the saturated vapor pressure, and a cavitation core enters the shear layer, encounters lower vortex core low pressure and rapidly grows into a cavity bubble, and high-intensity cavitation is caused. It should be noted that, during the cavitation process, the two driving protrusions 17 move in tandem through the driving mechanism, when one driving protrusion 17 advances, the driving protrusion 17 pushes the corresponding concave-convex elastic membrane 19 along the corresponding arc groove to form a convex shape, at this time, the other driving protrusion 17 cannot push the concave-convex elastic membrane 19 because of not advancing, the high-speed jet flows to wash the corresponding concave-convex elastic membrane 19 into a concave shape, the convex concave-convex elastic membrane 19 and the concave-convex elastic membrane 19 alternate continuously, and the high-speed jet flows generate a back jet flow after hitting the concave-convex elastic membrane 19, and the back jet flow also changes continuously due to the continuous alternate change of the hitting surface, so that the stress state of the fluid changes strongly, thereby the cavitation effect is better. The driving mechanism works on the principle that the driving motor 20 operates to rotate the rotating disc 21 and further rotate the rotating arm 22 on the rotating disc 21, and the roller 23 on the rotating arm 22 hits the step 25 on the driving block 24 to push the driving block 24 forward, thereby driving the driving nose 17 and the driving rod 16 forward. In addition, when the cavitated fluid flows out through the outflow pipe 8, the receiving end 902 of the ultrasonic transducer 9 receives the ultrasonic signal from the direction of the transmitting end 901 and converts the received ultrasonic signal into an acoustic wave analog signal, the amplifier receives and amplifies the acoustic wave analog signal, the a/D converter converts the amplified primary analog signal into an acoustic wave digital signal, the microprocessor receives and judges the acoustic wave digital signal from the a/D converter and outputs a corresponding feedback signal, the output unit is controlled by the microprocessor and displays the received feedback signal, so that the effect of monitoring the cavitation process in real time is achieved, and the output unit can adopt any other equipment capable of realizing information output, such as a display or an atlas printer. In addition, the staff can also adjust the length that outlet pipe 8 stretches into rectifier tube 1 inside as required, and then adjust the length of convergent toroidal cavity to this realization is to the regulation of the velocity of flow when high-speed efflux is jetted out from convergent toroidal cavity, and specific adjustment process is, unscrews fastening bolt 26 and loosens outlet pipe 8, twitches outlet pipe 8 and adjusts it to the suitable length that stretches into, and it can to tighten fastening bolt 26 again. And when the staff was when the installation backward flow subassembly, only need insert back pressure section 5 with cock stem 14, again with screw thread seat 13 screw in screwed interface 12 can, this kind of mounting means not only be convenient for install and dismantle, still can be through the degree of depth in adjustment screw thread seat 13 screw in screwed interface 12, adjust the length that cock stem 14 inserted back pressure section 5, and then the distance of adjustment back pressure section 5 port and cock stem 14 end (be the actual working length of back pressure section 5), actual working length is longer, the back pressure is less, the staff can adjust cock stem 14 depth of insertion as required.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.

Claims (10)

1. The utility model provides a strong formula annular jet cavitation of cutting takes place and monitoring devices, a serial communication port, including rectifier tube (1), rectifier tube (1) one end is run through and is provided with out flow tube (8), and rectifier tube (1) other end can be dismantled and be connected with the backward flow subassembly, direct section (3), shrink section (4) and back pressure section (5) have been seted up from one side to the opposite side in proper order to rectifier tube (1) inside, and shrink section (4) inner wall and the peripheral convergent ring-shaped cavity that forms of play flow tube (8).

2. The strong shear annular jet cavitation generation and monitoring device of claim 1, wherein the backflow assembly specifically comprises: backward flow seat (2), and backward flow seat (2) one end fixedly connected with screw thread seat (13), screw thread seat (12) have been seted up to the side center fixedly connected with cock stem (14) of backward flow seat (2), and cock stem (14) insert in backpressure section (5) and rather than the phase-match, hickey (12) have been seted up to rectifier tube (1) other end, can dismantle in screw thread seat (13) screw in hickey (12), circular slot (18) have been seted up to the one end that backward flow seat (2) were kept away from in cock stem (14), and circular slot (18) inner wall intermediate position fixedly connected with baffle (27), baffle (27) separate into the arc groove of two symmetries with circular slot (18), and arc inslot inner wall fixedly connected with can unsmooth elastic membrane (19), swing joint has rather than assorted plush (17) in the arc groove of unsmooth elastic membrane (19) one side, and plush (17) one side is equipped with actuating mechanism and is used for driving plush (17) to move, two another when plush (17) one advances, the two staggers each other.

3. The strong shear type annular jet cavitation generation and monitoring device according to claim 2, wherein the driving mechanism specifically comprises: the backflow seat is characterized by comprising a driving rod (16) and a driving block (24), one end of the driving rod (16) is fixedly connected with a raised head (17), the other end of the driving rod (16) penetrates through a threaded seat (13) and a plug rod (14) and extends into a driving cavity (15) formed in the backflow seat (2), the driving block (24) is located in the driving cavity (15) and is fixedly connected with the other end of the driving rod (16), and a power piece is arranged below the driving block (24) and used for driving the driving block (24) to move.

4. The strong shear type annular jet cavitation generation and monitoring device according to claim 3, wherein the power member specifically comprises: the rotary table (21) is located below the driving block (24), the lateral surface of the rotary table (21) is fixedly connected with three rotating arms (22) which are evenly distributed, one end of each rotating arm (22) is rotatably connected with a roller (23), the bottom end face of the driving block (24) is provided with a step (25), a driving motor (20) is embedded on the inner wall of the driving cavity (15), and the output shaft of the driving motor (20) is fixedly connected with the center of the lateral surface of the rotary table (21).

5. A strong shear type annular jet cavitation generation and monitoring device as claimed in claim 2, characterized in that a plurality of uniformly distributed particle protrusions (28) are fixedly connected to the outer surface of the concavo-convex elastic membrane (19).

6. A strong shear type annular jet cavitation generation and monitoring device according to claim 1, characterized in that, the rectifying tube (1) one end fixedly connected with seal dish (6), and seal dish (6) side center fixedly connected with tighrening ring (7), go out the inside of tighrening tube (1) of fastened ring (7) and seal dish (6) and extension, and tighrening ring (7) lateral surface threaded connection has at least three fastening bolt (26) to be used for fixing the position of going out the flow tube (8) one end.

7. A strong shear type annular jet cavitation generation and monitoring device according to claim 6, characterized in that a sealing ring (10) is embedded between the inside of the sealing disc (6) and the outer wall of the outflow pipe (8).

8. A strong shear type annular jet cavitation generation and monitoring device according to claim 1, characterized by further comprising a plurality of ultrasonic transducers (9), wherein the plurality of ultrasonic transducers (9) are sequentially fixed along the length direction of the outflow pipe (8), and the transmitting end (901) and the receiving end (902) of the ultrasonic transducers (9) are correspondingly installed on the peripheral side of the outflow pipe (8).

9. A strong shear type annular jet cavitation generation and monitoring device according to claim 1, characterized by further comprising a high pressure water supply pipe (11), wherein the high pressure water supply pipe (11) is vertically communicated with the rectifier tube (1).

10. A strong shear annular jet cavitation generation and monitoring device as claimed in claim 1, characterized in that the outer diameter of the outflow pipe (8) is smaller than the inner diameter of the rectifier tube (1).

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