CN212450732U

CN212450732U - Micro-bubble jet device

Info

Publication number: CN212450732U
Application number: CN202021673982.8U
Authority: CN
Inventors: 李品
Original assignee: Fuzhou Shuiyan Environment Technology Co ltd
Current assignee: Fuzhou Shuiyan Environment Technology Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-02-02
Anticipated expiration: 2030-08-12

Abstract

The utility model relates to a microbubble ejector, its characterized in that: the micro-bubble jet device comprises a pipe body, wherein one end of the pipe body is a water inlet, the other end of the pipe body is a micro-bubble water output end, at least one group of water guide blocks are arranged on the inner peripheral wall of the pipe body, each group of water guide block comprises at least two convex blocks which are uniformly distributed along the circumference in the same cross section, each convex block is provided with a water guide surface for changing the straight line advance of water flow passing through the convex block into spiral advance, air passing holes are arranged on the pipe body and communicated with air, and the air passing holes can also enter the medium A in a spiral or inclined plane for enhancing the rotation, cutting; the micro-bubble jet device is simple in structure and reasonable in design, and kinetic energy of micro-nano bubbles can be increased while the micro-bubble jet device is favorable for generating a large amount of micro-nano bubbles.

Description

Micro-bubble jet device

The technical field is as follows:

the utility model relates to a microbubble ejector.

Background art:

at present, a jet device can be used in sewage treatment, the jet device adopts a Venturi principle, the main function of the common jet device is 'jet', and a large amount of air (oxygen and the like) is brought in, so that the efficiency of improving the dissolved oxygen content of a water body is very low due to large bubbles and low dissolved air rate. The currently popular micro-bubble generation device aiming at the gas dissolving rate and the micro-nano bubbles can increase micro-bubbles and oxygen content, but has low relative water kinetic energy, low relative efficiency and larger equipment volume.

The invention content is as follows:

in view of the not enough of prior art, the utility model aims to solve the technical problem that a microbubble ejector is provided, this microbubble ejector simple structure, reasonable in design increase its kinetic energy when being favorable to producing a large amount of micro-nano bubbles.

The utility model discloses microbubble ejector, its characterized in that: the water guide device comprises a pipe body, wherein one end of the pipe body is a water inlet, the other end of the pipe body is a micro-bubble water output end, at least one group of water guide blocks are arranged on the inner peripheral wall of the pipe body, each group of water guide blocks comprises at least two convex blocks which are uniformly distributed along the circumference in the same cross section, each convex block is provided with a water guide surface which enables water flow passing through the convex blocks to move linearly to be changed into spiral moving, an air passing hole is formed in the pipe body, and the air passing hole is.

Furthermore, the water guide surface is an inclined surface, an included angle of 5-85 degrees is formed between the water guide surface and the axis of the pipe body, and the inclined surfaces on the adjacent lugs form different or same included angles with the axis of the pipe body.

Furthermore, two to five lugs are uniformly distributed in the same section along the circumference, the section is a section perpendicular to the axis of the tube body, and the air passing holes are located on the side parts of the lugs.

Furthermore, a through hole perpendicular to the axis of the pipe body is formed in the pipe body, a cylinder block is fixed in the through hole, the convex block is a part of the cylinder block protruding out of the inner peripheral wall of the pipe body, and a guide circular bead is arranged between the cylinder block and the water guide surface.

Furthermore, two groups of water guide blocks are arranged in the pipe body along the axial direction of the pipe body, and the air passing hole is positioned between the two groups of water guide blocks.

Furthermore, a plurality of air passing holes are uniformly distributed on the circumference of the same section of the pipe body along the axis vertical to the pipe body, and the central lines of the air passing holes are vertical to or tangent to the inner peripheral wall of the pipe body, or the air passing holes are spiral; or the air passing hole forms an included angle with the axis of the pipe body.

Further, the peripheral cover of above-mentioned body is equipped with the outer tube, the outer tube both ends are for the confined with the body periphery wall, be equipped with the trachea mouth of pipe on the outer tube, form the negative pressure cavity between outer tube internal perisporium and the body periphery wall, cross gas pocket and negative pressure cavity intercommunication.

Furthermore, the pipe body is three sections which are respectively a first section, a second section and a third section, the pipe diameters of the first section and the third section are the same and are larger than that of the second section, two ends of the second section are respectively in threaded connection with the first section and the third section, the water guide block and the air passing hole are respectively arranged on the first section and the third section, and two end parts of the outer sleeve are in threaded connection with the first section and the third section; the aperture of the central hole of the pipe body is gradually enlarged in a horn shape.

The utility model discloses microbubble ejector's operating method, its characterized in that: the micro-bubble jet device comprises a pipe body, wherein one end of the pipe body is a water inlet, the other end of the pipe body is a micro-bubble water output end, at least one group of water guide blocks are arranged on the inner peripheral wall of the pipe body, each group of water guide blocks comprises at least two convex blocks which are uniformly distributed along the circumference in the same cross section, each convex block is provided with a water guide surface for changing the water flow passing through the convex block from straight line advancing to spiral advancing, air passing holes are formed in the pipe body, and the air passing holes are communicated with air; when the air guide block type air pump works, the first end of the pipe body is connected with the water pump, the air hole of the pipe body is communicated with air, the water pump is started, liquid and gas media A enter the pipe from the first end of the pipe body, gas, liquid or powder media B enter the pipe from the air hole, after the media A enter the pipe body, liquid or air flow linearly advances when the media A do not reach the water guide block, after being guided by the water guide surface on the convex block, the linearly advancing fluid is changed into spirally advancing fluid, and the spirally advancing fluid and the media B fluid which can spirally enter the pipe body are mixed to form a micro-nano bubble or mixture.

Furthermore, the pipe body is three sections which are respectively a first section, a second section and a third section, the pipe diameters of the first section and the third section are the same and are larger than that of the second section, two ends of the second section are respectively in threaded connection with the first section and the third section, the water guide block and the air passing hole are respectively arranged on the first section and the third section, two ends of the outer sleeve are in threaded connection with the first section and the third section, and the first section and the third section are respectively provided with the water guide block and the air passing hole; after water enters the pipe body and is guided by the water guide surface of the first section of water guide block, spiral water flow is formed, and meanwhile, the water flow is mixed with air entering the pipe body to form micro-nano bubbles; and then, after the water is guided by the water guide surface of the third section of water guide block, more spiral water flow is formed, and more abundant micro-nano bubbles are formed.

The utility model discloses microbubble ejector simple structure, reasonable in design are favorable to making the bubble volume of its production reduce greatly to more air of portability.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Description of the drawings:

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1 at the bump;

fig. 3 is a cross-sectional view of an embodiment of the present invention;

fig. 4 is a cross-sectional view of an embodiment of the present invention;

FIG. 5 is a cross-sectional view of FIG. 4 at the bump;

fig. 6 is a cross-sectional view of an embodiment of the present invention;

FIG. 7 is a front view of the cylinder block;

FIG. 8 is a side view of FIG. 7;

fig. 9 is a cross-sectional view of another embodiment of the present invention;

fig. 10 is a cross-sectional view of another embodiment of the present invention.

FIGS. 11-14 are cross-sectional views of different shapes of air holes provided in the tube body;

FIG. 15 is a transverse cross-sectional view of FIG. 1;

FIG. 16 is a partial view of FIG. 15;

FIG. 17 is a schematic view showing the operation of a high concentration organic wastewater treatment apparatus;

fig. 18 and 19 are partial views of fig. 17.

The specific implementation mode is as follows:

in order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The utility model discloses microbubble ejector includes that one end is water inlet 1, one end is body 3 of microbubble water output 2, be equipped with at least a set of water guide block 4 on the internal perisporium of body 3, and the water guide block of every group includes along two at least lugs 5 of circumference equipartition in same cross-section, can be 2-5 lugs, and this lug can be made with body an organic whole or inlay after independently making and establish and fix on the body, all is equipped with on every lug 5 so that rivers or the air current through this lug advance by the straight line and become the water guide face 6 that the spiral was advanced, is equipped with gas pocket 7 on the body, gas pocket 7 and air intercommunication should cross gas pocket 7 and can be one or more.

The air vent 7 can be far from the bump or can be arranged at the side part close to the bump.

In one embodiment, the water guide surface is an inclined surface, and forms an included angle of 5-85 degrees with the axis of the pipe body, the inclined surfaces on adjacent lugs form different or same included angles with the axis of the pipe body, when three lugs 5 are uniformly distributed along the circumference in the same cross section, the inclined water guide surface forms an included angle of 40-65 degrees, preferably 60 degrees with the axis, and when four lugs 5 are uniformly distributed along the circumference in the same cross section, the inclined water guide surface forms an included angle of 40-52 degrees, preferably 42 degrees with the axis; the water guide surface can be an arc surface, a curved surface or the like, and after the linear water flow or the air flow passes through the water guide inclined surface, the water body or the air in contact with the water guide inclined surface generates a spiral, and the water body or the air in the water guide inclined surface is driven to generate a spiral in the continuous traveling process.

In an embodiment, two to five projections 5 are uniformly distributed on the same cross section along the circumference, and the cross section is a cross section perpendicular to the axis of the tube body, in an actual test, each projection 5 is not in the same cross section, but the effect is poorer than that of the projections in the same cross section, and the projection 5 in the same cross section means that the central axis of the projection falls on the cross section perpendicular to the axis of the tube body.

In one embodiment, a through hole 9 perpendicular to the axis of the pipe body is formed in the pipe body 3, a cylinder block 10 is fixed in the through hole, the protrusion 5 is a portion of the cylinder block 10 protruding out of the inner peripheral wall of the pipe body, a fillet 11 is arranged between the cylinder block 10 and the water guide surface 6, the cylinder block 10 can be a cylindrical block or a square column, and the water guide surface 6 and the fillet 11 are formed by cutting the cylinder block 10; the through hole 9 is formed in the position perpendicular to the axis of the pipe body, the fixed column block 10 penetrates through the through hole, the processing is convenient, when the pipe body and the lug are made of metal materials, the pipe body and the lug can be manufactured only through a CNC (computerized numerical control) processing machine tool with multi-axis linkage, the through hole 7 can be manufactured through a common lathe and a milling machine, the production and manufacturing cost is low, in the embodiment, a space is reserved in the through hole 9 for arranging the through hole, namely the section of the column block 10 in the through hole 9 is smaller than that of the through hole 9, and a water passing pore channel is formed in the through hole.

The centre bore K of this application body (the middle part is the passageway of cylinder shape except the big taper mouth of water inlet 1, output 2) is tubaeform (is the toper) from water inlet 1 to output 2 side, and the tapering of this cylinder shape passageway is at 0.5-3 degrees.

In a preferred embodiment, two groups of water guide blocks 4 are arranged in the pipe body along the axial direction of the pipe body, the air passing holes are positioned between the two groups of water guide blocks, the air passing holes are provided with a plurality of air passing holes, and every several circumferences are uniformly distributed in the same section vertical to the axial direction of the pipe body; the central line of the air passing hole is vertical to or tangent to the inner peripheral wall of the pipe body, or the air passing hole is spiral; or the air passing holes form an included angle with the axis of the pipe body, the central line of the air passing holes is preferably tangent to the inner peripheral wall of the pipe body, and the included angle is formed between the air passing holes and the axis of the pipe body; the spiral air passing hole cannot be realized by machining, a spiral metal pipe can be embedded into a large hole which is arranged on the pipe body in advance, and a coagulant is embedded between the spiral metal pipe and the large hole.

In a preferred embodiment, the outer sleeve 12 is sleeved on the periphery of the pipe body 3, two ends of the outer sleeve 12 and the outer peripheral wall of the pipe body 3 are closed (two ends can be sealed by welding and fixing metal sheets), the outer sleeve 12 is provided with a pipe orifice 13, when the device is applied to deep water, the pipe orifice 13 is required to be connected with the extension pipe 8, so that the inlet end of the extension pipe 8 is higher than the water surface, when the device is directly used in an outdoor space, the extension pipe is not required to be connected, but a dust cover can be covered on the pipe orifice 13, a negative pressure cavity 14 is formed between the inner peripheral wall of the outer sleeve and the outer peripheral wall of the pipe body, the air passing hole 7 is communicated with the negative pressure cavity 14, the outer sleeve 12 is adopted to form the negative pressure cavity 14, only one pipe orifice 13 is required to be arranged after the negative pressure cavity 14 is arranged to connect, after the air pipe orifice 13 is communicated with air, the air enters the negative pressure cavity 14 through the air pipe orifice 13, then enters the pipe body 3 through the air passing holes 7 respectively, so that micro-nano bubble water is output at the second end of the pipe body 3, and better micro-nano bubble water is generated through the embodiment; the outer sleeve 12 is not needed when the air conditioner is used in outdoor space, because the air passing hole 7 can be directly communicated with air.

After the first end of the pipe body is connected with the water pump, the first end of the water enters the pipe body, negative pressure is generated in the inner hole of the pipe body, the air passing hole 7 and the negative pressure cavity 14, and therefore air can be sucked into the inner hole of the pipe body.

Further, for reasonable design, the tube body 3 is three segments, namely a first segment 15, a second segment 16 and a third segment 17, the first segment 15 and the third segment 17 have the same tube diameter, and is larger than or equal to the second section 16, two ends of the second section 16 are respectively in threaded connection with the first section 15 and the third section 17, the water guide block and the air passing hole are respectively arranged on the first section and the third section, two ends of the outer sleeve are in threaded connection with the first section and the third section, the inner peripheral wall diameter of the second segment 16 can be the same as or different from the inner peripheral walls of the first segment 15 and the third segment 17, and the inner peripheral wall of the second segment 16 is provided with at least one concave ring 18, the circular tumbling of the water flow is facilitated by the arrangement of the concave ring 18, and for the convenience of processing, the first segment 15 and the third segment 17 can be shared in the same shape and structure, and the second segment 16 is a pipe rod with two ends screwed with the ends of the first segment 15 and the third segment 17.

The inner holes of the water inlet 1 end (the first end of the pipe body) and the micro-bubble water output end 2 (the second end of the pipe body) of the pipe body 3 can be horn mouths, and the pipe body, the convex block, the cylindrical block and the like can be made of metal materials or plastic materials.

The utility model discloses a working method of microbubble ejector, microbubble ejector includes that one end is water inlet 1, one end is body 3 of microbubble water output 2, be equipped with at least a set of water guide block 4 on the internal perisporium of body 3, the water guide block of every group includes along the at least two lugs 5 of circumference equipartition in same cross-section, can be 2-5 lugs, this lug can be with body one-piece or after independent preparation inlay and fix on the body, be equipped with on every lug 5 so that the rivers that pass through this lug advance by the straight line and become the water guide surface 6 that the spiral advances, be equipped with air passing hole 7 on the body, air passing hole 7 communicates with the air, this air passing hole 7 can be one or more; when the air guide block type air pump works, the first end of the pipe body is connected with the water pump, the air hole of the pipe body is communicated with air, the water pump is started, liquid and gas media A enter the pipe from the first end of the pipe body, gas, liquid or powder media B enter the pipe from the air hole, after the media A enter the pipe body, liquid or air flow linearly advances when the media A do not reach the water guide block, after being guided by the water guide surface on the convex block, the linearly advancing fluid is changed into spirally advancing fluid, and the spirally advancing fluid and the media B fluid which can spirally enter the pipe body are mixed to form a micro-nano bubble or mixture.

Further, the pipe body 3 is three segments, which are a first segment 15, a second segment 16 and a third segment 17, respectively, the first segment 15 and the third segment 17 have the same pipe diameter and are larger than the second segment 16, two ends of the second segment 16 are respectively in threaded connection with the first segment 15 and the third segment 17, the water guide block and the air passing hole are respectively arranged on the first segment and the third segment, and two end parts of the outer sleeve are in threaded connection with the first segment and the third segment; after water enters the pipe body and is guided by the water guide surface of the first section of water guide block, spiral water flow is formed, and meanwhile, the water flow is mixed with air entering the pipe body to form micro-nano bubbles; and then, after the water is guided by the water guide surface of the third section of water guide block, more spiral water flow is formed, and more abundant micro-nano bubbles are formed.

The tube 3 having three segments is merely an example, and is an embodiment convenient for manufacturing, and it is not necessary to adopt the solution, and the tube may be two segments, four segments, etc.

The microbubble jet device mainly completes the following things which are often required to be completed by a plurality of devices and procedures together and with high efficiency, and can realize that:

1. a large amount of micro-nano bubbles are generated;

2. jetting large water quantity to drive the water body to form water flow;

3. the high-pressure jet foaming generates 1-4kgf/cm of pressure, the microbubbles are ionized while foaming (a flocculation function of adsorbing suspended matters in water is generated), hydroxyl radicals generated by the pressure breaking cavitation effect of the microbubbles can decompose and degrade pollutants, and meanwhile, the impact of water flow subjected to high-pressure rapid rotary cutting can ionize and degrade sewage (sucked and sprayed water) and destroy polluted aquatic cells such as algae.

The micro-bubble jet device of the utility model can work only by connecting a water pump, the equipment is simple, and the cost is low; the water input by the water pump is the water of the water body to be treated, no additional tap water and the like are needed, and the use cost is low; in addition, most importantly, the water treatment efficiency is high, the oxygen content of the water body can be increased to one cube per hour by the conventional micro-bubble generating device, and the oxygen content can reach 10-20 cubes per hour; when treating equivalent sewage, current equipment not only need occupy bigger equipment volume, also need to occupy bigger container or the cell body of storage sewage.

Therefore, the application has the remarkable characteristics that: small volume, high sewage treatment efficiency, small occupied space for sewage treatment and low cost of manufacturing and using equipment.

The micro-bubble jet device is applied to a high-concentration organic wastewater treatment device, the high-concentration organic wastewater treatment device comprises a tank body B1 for containing high-concentration organic wastewater and a first water pump B2 arranged in the tank body, a first tank container B3 and a second tank container B4 are arranged outside the tank body B1, the water outlet end of the first water pump B2 is connected with the water inlet end of the first tank container B3 after being connected with the first micro-bubble jet device B5, the water outlet end of the first tank container B3 leads to a tank body B1, a branch pipeline B7 with a switch valve B6 is connected by the water inlet end of the first tank container, the branch pipeline B7 is connected with the water inlet end of a second tank container B4, an outlet B10 at the lower part of the second tank container is connected with a second water pump B8 and a second microbubble ejector B9 in sequence and then is connected with an inlet B11 at the lower part of the second tank container, and a water outlet B12 is formed in the bottom of the second tank container.

High-concentration organic wastewater is input into a tank body B1, after the tank body is filled with the high-concentration organic wastewater, a first water pump B2 and a second water pump B8 are started to work, the wastewater enters a first tank body container B3 after being treated by a first micro-bubble jet device B5 for a time, meanwhile, part of the wastewater is branched and conveyed to a second tank body container B4, the water after being treated for the time flows back into a tank body B1 through the first tank body container, the water entering a second tank body container B4 sequentially passes through a second water pump B8 and a second micro-bubble jet device B9 from an outlet at the lower part of the second tank body container B4, the water enters an inlet at the lower part of the second tank body container after being treated for a second time, the water in the second tank body container is circularly treated, the water is discharged from a water outlet B12 at the bottom of the second tank body container after the treatment (a valve is arranged on a water discharge pipeline), the tank body B1 can be formed by grooving on the ground, The first tank container can be called as an oxidation tank, and the second tank container can be an existing fluidized bed bioreactor, or spherical, annular or square fluidized bed filler can be placed in the tank.

The working method of the high-concentration organic wastewater treatment device comprises a tank body B1 for containing high-concentration organic wastewater and a first water pump B2 arranged in the tank body, wherein a first tank container B3 and a second tank container B4 are arranged outside the tank body B1, the water outlet end of a first water pump B2 is connected with the water inlet end of a first micro-bubble jet device B5 and then connected with the water inlet end of the first tank container B3, the water outlet end of the first tank container B3 is communicated with a tank body B1, a branch pipeline B7 with a switch valve B6 is connected by the water inlet end of the first tank container, the branch pipeline B7 is connected with the water inlet end of a second tank container B4, an outlet B10 at the lower part of the second tank container is sequentially connected with a second water pump B8 and a second micro-bubble jet device B9 and then connected with an inlet B11 at the lower part of the second tank container, and a water outlet B12 is arranged at the bottom of the second tank container; during operation, high concentration organic waste water imports the cell body in, after filling with, start first water pump, second water pump work, waste water gets into first jar of body container after first microbubble ejector is once handled, partial branch is carried to second jar of body container simultaneously, water after once handling flows back to the cell body through first jar of body container in, at the water that gets into second jar of body container, export from second jar of body container lower part is through second water pump and second microbubble ejector in proper order, water gets into the entry of second jar of body container lower part after the secondary treatment of second microbubble ejector, realize the circulation of second jar of body container internal water and handle, discharge from the bottom outlet of second jar of body container after handling.

The specific field treatment example of the high concentration organic wastewater treatment device is that high concentration organic wastewater in a food plant is discharged at 50t/d, the tanks (the first tank container B3 and the second tank container B4) are planted by 25m in total, 20g/h of ozone generated by an ozone generator is mixed and added at the front end (B13), and the following detection tables are provided for different water quality parameters of a sewage inlet end and a water outlet end:

(Mg/L)	COD Mn	BOD	SS	animal oil
					Inflow water	270	480	560	190
Discharging water	42	58	67	7

Therefore, the application has the remarkable characteristics that: 1. the processing capacity is large and is 3-5 times of that of the common biochemical method, the sludge amount is 2, the sludge amount is less than 1/4 of the common biochemical method (activated sludge method), 3, the occupied area is small, the arrangement is convenient, and only the area below 1/3 of the common biochemical method is needed, and the main device tank body can be arranged.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. A microbubble ejector is characterized in that: the water guide device comprises a pipe body, wherein one end of the pipe body is a water inlet, the other end of the pipe body is a micro-bubble water output end, at least one group of water guide blocks are arranged on the inner peripheral wall of the pipe body, each group of water guide blocks comprises at least two convex blocks which are uniformly distributed along the circumference in the same cross section, each convex block is provided with a water guide surface which enables water flow passing through the convex blocks to move linearly to be changed into spiral moving, an air passing hole is formed in the pipe body, and the air passing hole is.

2. The microbubble ejector as set forth in claim 1, characterized in that: the water guide surface is an inclined surface, an included angle of 5-85 degrees is formed between the water guide surface and the axis of the pipe body, and the inclined surfaces on the adjacent lugs form different or same included angles with the axis of the pipe body.

3. The microbubble ejector as set forth in claim 1, characterized in that: two to five convex blocks are uniformly distributed in the same section along the circumference, and the section is a section vertical to the axis of the tube body.

4. The microbubble ejector as claimed in claim 1, 2 or 3, characterized in that: the pipe body is provided with a through hole perpendicular to the axis of the pipe body, a cylinder block is fixed in the through hole, the convex block is a part of the cylinder block protruding out of the inner peripheral wall of the pipe body, and a guide circular bead is arranged between the cylinder block and the water guide surface.

5. The microbubble ejector as set forth in claim 4, wherein: two groups of water guide blocks are arranged in the pipe body along the axis direction of the pipe body, and the air passing hole is positioned between the two groups of water guide blocks.

6. The microbubble ejector as set forth in claim 1, characterized in that: the pipe body is evenly distributed with a plurality of air passing holes on the circumference of the same section or different sections perpendicular to the axis of the pipe body, and the central lines of the air passing holes are perpendicular to or tangent to the inner peripheral wall of the pipe body.

7. The microbubble ejector as set forth in claim 1, characterized in that: the air passing holes are spiral; or the air passing hole forms an included angle with the axis of the pipe body.

8. The microbubble ejector as claimed in claim 1, 5, 6 or 7, wherein: the peripheral cover of body is equipped with the outer tube, the outer tube both ends are the confined with the body periphery wall, be equipped with the trachea mouth of pipe on the outer tube, form the negative pressure cavity between outer tube internal perisporium and the body periphery wall, cross gas pocket and negative pressure cavity intercommunication.

9. The microbubble ejector as set forth in claim 8, wherein: the water guide block and the air passing hole are respectively arranged on the first section and the third section, and two ends of the outer sleeve are in threaded connection with the first section and the third section.

10. The microbubble ejector as claimed in claim 9, characterized in that: the inner peripheral wall of the second section is provided with at least one concave ring, the first section and the third section are identical in shape and structure, and the second section is a pipe rod with two ends screwed with the ends of the first section and the third section.