Multi-throat multi-stage fluidic mixer

Abstract

The utility model discloses a kind of multi-throat multi-stage jet flow mixers, it is related to injection device technical field;Multi-throat multi-stage jet flow mixer includes inner jet pipe, outer jet pipe and spray head;The inner jet pipe part is placed in the outer jet pipe, and with the outer jet pipe detachable connection, the spray head is connected with the inner jet pipe export;First inlet is equipped on the outer wall of the outer jet pipe, first throat for generating negative pressure suction is provided on the outer jet pipe, and the first throat is communicated with the inner cavity of the outer jet pipe and the first inlet;More than one second throat is equipped on the inner jet pipe, and a plurality of first through holes are circumferentially provided in the second throat;The utility model can be combined with inner tube and outer tube, and also can improve the mixing efficiency of multi-throat multi-stage jet flow mixer.

Description

Technical Field

[0001] This utility model relates to the field of jet device technology, and in particular to a multi-throat multi-stage jet mixer. Background Technology

[0002] Multi-stage jet ejectors improve suction efficiency, mixing uniformity, and adaptability to operating conditions compared to traditional jet ejectors through multi-stage fluid energy conversion and mixing design. Their application areas cover multiple high-demand scenarios such as industry, environmental protection, and energy.

[0003] Currently, while multistage jet ejectors with inner and outer tube structures are diverse in type, they generally suffer from poor structural adaptability. Due to significant differences in fluid throughput and pressure parameters required by different industries and operating conditions, the structural designs of multistage jet ejectors used in different fields vary considerably. Traditional design models require combining inner and outer tubes of different specifications for each specific need. This not only results in long product development cycles and high design costs, but also necessitates stockpiling large quantities of inner and outer tubes of varying specifications, leading to inventory buildup and capital tied up. Furthermore, when on-site operating conditions change and jet ejector components need to be replaced, the complexity of different specification combinations increases the difficulty and cost of equipment maintenance.

[0004] Therefore, how to provide a multi-throat, multi-stage jet mixer that can improve the mixing effect, adapt the same inner tube to different outer tubes, reduce R&D, production and maintenance costs, and improve the equipment's versatility and flexibility has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to address the deficiencies and shortcomings of existing technologies by providing a multi-throat, multi-stage jet mixer that allows for the combination and adaptation of inner and outer tubes, and also improves the mixing efficiency of the multi-throat, multi-stage jet mixer.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a multi-throat multi-stage jet mixer, including an inner jet pipe, an outer jet pipe, and a nozzle; the inner jet pipe is partially placed inside the outer jet pipe and is detachably connected to the outer jet pipe, and the nozzle is connected to the outlet of the inner jet pipe;

[0008] The outer wall of the external jet tube is provided with a first inlet, and the external jet tube is provided with a first throat for generating negative pressure suction. The first throat connects the inner cavity of the external jet tube with the first inlet.

[0009] The inner jet tube has one or more second throats, and the second throats are provided with a plurality of first through holes in the circumferential direction.

[0010] Preferably, the outer wall of the inner jet tube is provided with a spiral guide, which is a spiral guide protrusion or a spiral guide groove.

[0011] Preferably, the first through hole is a tapered hole, which includes a tapered buffer cavity and a fine hole channel, the fine hole channel connecting the tapered buffer cavity and the inner cavity of the second throat.

[0012] Preferably, the first inlet is connected to a four-way solenoid valve.

[0013] Preferably, the nozzle has a plurality of nozzles on its spray panel, and the nozzles are hexagonal.

[0014] Preferably, the external jet tube includes a first external jet tube, the first external jet tube includes a first outer tube body, the first outer tube body is coaxially arranged with the inner jet tube, the first throat is disposed at the front end of the first outer tube body, the minimum radial distance of the first throat is greater than the outer diameter of the inner jet tube, and the first throat is used to draw the fluid entering from the first inlet into the inner cavity of the first outer tube body.

[0015] Preferably, the external jet pipe includes a second external jet pipe, which includes a second outer pipe body and a first loop pipe. The second outer pipe body is coaxially arranged with the inner jet pipe. The front end of the second outer pipe body is provided with a third throat, which is used to draw the fluid entering from the first loop pipe into the inner cavity of the second outer pipe body. The outer wall of the first loop pipe is provided with a first inlet, and the first loop pipe is provided with a first throat for generating negative pressure suction. The first throat connects the inner cavity of the first loop pipe with the first inlet.

[0016] Preferably, the first loop pipe includes a first inlet section, a first extension section and a first outlet section connected in sequence. The inlet of the first inlet section is connected to the outer wall of the second outer pipe body, and the outlet of the first outlet section is connected to the third throat. The first outlet section is provided with the first inlet and the first throat.

[0017] Preferably, the external jet tube includes a third external jet tube, which includes a jet inlet, a third outer tube body, and a double-loop pipe; the inner jet tube is fitted with the third outer tube body; the outer wall of the double-loop pipe is provided with a first inlet, and the double-loop pipe is provided with a first throat for generating negative pressure suction, the first throat connecting the inner cavity of the double-loop pipe with the first inlet;

[0018] The double-loop pipe includes a second inlet section, a second outlet section, a third outlet section, a second extension section, and a third extension section. The jet inlet is connected to the second inlet section. The second inlet section, the second outlet section, and the third outlet section are spaced apart between the third outer pipe body and the second extension section, and are connected to the third outer pipe body and the second extension section. The third extension section has a first inlet on its outer wall. The second outlet section and the third outlet section each have a first throat. The two first throats are connected to the two ports of the third extension section respectively.

[0019] Preferably, a flow divider is provided inside the jet inlet, the flow divider being used to split the fluid entering from the jet inlet.

[0020] The present invention achieves the following technical advantages over the prior art:

[0021] The outer jet tube provides a stable installation space for the inner jet tube. The first throat uses negative pressure to draw in external gas or fluid into the outer jet tube. The first inlet on the outer wall of the outer jet tube is equipped with an adjustable flow control valve and a pressure sensor, which can accurately introduce external gas or fluid according to process requirements.

[0022] The second throat generates negative pressure, and the fluid located outside the inner jet tube and inside the outer jet tube is drawn into the inner jet tube through several first through holes evenly distributed around the second throat. This allows the introduced fluid to mix with the original fluid in the inner jet tube. The inner jet tube and the multiple second throats distributed at intervals on it can perform multiple mixing operations, thereby improving the mixing efficiency.

[0023] The inner and outer jet tubes are detachably connected, enabling flexible adaptation between inner tubes of the same specification and outer tubes of different specifications, significantly improving the versatility of the equipment.

[0024] The nozzle mixes the fluid and ejects it in a specific shape and at a specific velocity to meet the needs of different working conditions, from fine atomization to powerful spraying.

[0025] The multi-throat, multi-stage jet mixer provided by this invention can improve the mixing effect, achieve flexible adaptation between the same specification inner tube and different outer tubes, and meet different working conditions. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a sleeve-type multi-throat multi-stage jet mixer disclosed in a specific embodiment of the present invention (the arrows in the figure indicate the direction of fluid delivery);

[0028] Figure 2 This is a schematic diagram of the structure of the first external jet tube disclosed in a specific embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the internal jet tube disclosed in a specific embodiment of the present utility model;

[0030] Figure 4 This is a schematic diagram of the structure of a nested multi-throat multi-stage jet mixer disclosed in a specific embodiment of the present invention (the arrows in the figure indicate the direction of fluid delivery);

[0031] Figure 5 This is a schematic diagram of the structure of the second external jet tube disclosed in a specific embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of a type A parallel multi-throat multi-stage jet mixer disclosed in a specific embodiment of the present invention (the arrows in the figure indicate the direction of fluid delivery, and the inner jet pipe is tightly fitted to the inner wall of the third outer pipe body).

[0033] Figure 7 This is a schematic diagram of the structure of a type B parallel multi-throat multi-stage jet mixer disclosed in a specific embodiment of the present invention (the arrows in the figure indicate the direction of fluid delivery, and the inner jet tube is placed inside the third outer tube body).

[0034] Figure 8 This is a structural diagram of the third external jet tube disclosed in a specific embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure of the tapered hole disclosed in a specific embodiment of the present invention.

[0036] Figure 10 This is a cross-sectional view of the nozzle ejection panel disclosed in a specific embodiment of the present utility model.

[0037] Among them, 100 is the inner jet tube; 110 is the spiral guide; 120 is the second throat; 121 is the first contraction section; 122 is the first throat neck section; 123 is the first expansion section; 124 is the first through hole; 125 is the conical buffer cavity; and 126 is the fine hole channel.

[0038] 200, First throat; 210, First inlet; 220, First external jet pipe; 221, First outer pipe body; 222, Four-way solenoid valve; 230, Second external jet pipe; 231, Second outer pipe body; 232, Third throat; 233, First inlet section; 234, First extension section; 235, First outlet section; 240, Third external jet pipe; 241, Jet inlet; 242, Third outer pipe body; 243, Second inlet section; 244, Second outlet section; 245, Third outlet section; 246, Second extension section; 247, Third extension section; 248, Flow divider;

[0039] 300, Nozzle; 310, Spray panel; 320, Nozzle. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] like Figures 1 to 10 As shown, this utility model provides a multi-throat multi-stage jet mixer, including an inner jet pipe 100, an outer jet pipe, and a nozzle 300; the inner jet pipe 100 is partially placed inside the outer jet pipe and is detachably connected to the outer jet pipe, and the nozzle 300 is connected to the outlet of the inner jet pipe 100; a first inlet 210 is provided on the outer wall of the outer jet pipe, and a first throat 200 for generating negative pressure suction is provided on the outer jet pipe, the first throat 200 connecting the inner cavity of the outer jet pipe with the first inlet 210; one or more second throats 120 are provided on the inner jet pipe 100, and a plurality of first through holes 124 are circumferentially opened in the second throats 120.

[0043] It is understood that the second throat 120 includes a first contraction section 121, a first throat neck section 122, and a first expansion section 123 connected in sequence. The opening direction of the first contraction section 121 is opposite to the fluid transport direction of the inner jet pipe 100, and the outlet direction of the first expansion section 123 is the same as the fluid transport direction of the inner jet pipe 100. By adopting a Venturi structure of "contraction section-throat neck section-expansion section", the flow velocity and pressure of the first throat neck section 122 are increased and decreased, thereby generating a negative pressure. The circumferentially distributed first through holes 124 are used to draw fluid from the cavities outside the inner jet pipe 100 and inside the outer jet pipe into the inner jet pipe 100 through the negative pressure, and mix it with the original fluid inside the inner jet pipe 100. The inner jet pipe 100 and the multiple first throats 200 distributed at intervals on it cooperate to achieve multiple mixing, which greatly improves the mixing efficiency.

[0044] The outer jet tube provides a stable installation space for the inner jet tube 100. Its outer wall's first inlet 210 can be equipped with a flow control valve and pressure sensor to precisely control the amount of external gas or fluid introduced, meeting different process requirements. The first throat 200 uses negative pressure to draw the introduced external gas or fluid into the outer jet tube. The detachable connection design between the inner and outer jet tubes (e.g., threaded connection, quick-release connection structure) breaks the limitations of fixed combinations of inner and outer tubes in traditional multi-stage jetters, allowing the same specification inner tube to adapt to various outer tubes, significantly enhancing the equipment's versatility and scalability.

[0045] In some specific implementations, a spiral guide 110 is provided on the outer wall of the inner jet pipe 100. The spiral guide 110 is a spiral guide protrusion or a spiral guide groove.

[0046] Understandably, when the fluid flows inside the inner jet tube 100, the spiral guide 110 will cause the fluid to move in a spiral motion, increasing the degree of turbulence of the fluid, allowing the fluid to diffuse and mix more fully, and improving the mixing efficiency and uniformity.

[0047] In some specific implementations, the first through hole 124 is a tapered hole, which includes a tapered buffer cavity 125 and a fine hole channel 126, which connects the tapered buffer cavity 125 and the inner cavity of the second throat 120.

[0048] Understandably, the design of the conical buffer chamber 125 and the fine-aperture channel 126 allows the fluid to accelerate again before entering the throat section, increasing the jet velocity and enhancing the shear mixing effect with the mainstream. The unidirectional conduction characteristic of the conical structure effectively prevents the main fluid from flowing back into the outer tube chamber. At the same time, the larger buffer chamber inlet can intercept larger particulate impurities, preventing them from entering the fine-aperture channel 126 and causing blockage, thus improving equipment reliability. For example, during oil-gas mixing, it can prevent oil droplets from adhering to or clogging the first through-hole 124.

[0049] In some specific implementations, the first inlet 210 is connected to a four-way solenoid valve 222.

[0050] Understandably, the four-way solenoid valve 222 can switch between multiple gas sources. For example, when used as an oxygenation device, the first inlet 210 connected to the four-way solenoid valve 222 can accommodate multiple modes of air / pure oxygen / ozone switching.

[0051] In some specific implementations, the nozzle 300 has several nozzles 320 on its spray panel 310, and the nozzles 320 are hexagonal.

[0052] Understandably, the hexagonal nozzle 320, relying on its geometric symmetry and close arrangement, allows for a higher density of nozzles 320 within the same panel area, improving the jetting efficiency per unit area. Furthermore, the straight edges and sharp corners of the hexagonal orifice help guide the fluid to form a diffused jet at a specific angle, reducing bubble escape rate. On the other hand, the corners of the hexagonal nozzle 320 create local high-speed shear zones, which enhance the breaking effect on viscous fluids through the shearing action of the corners when the fluid passes through, optimizing the jetting pattern and atomization uniformity of the mixed fluid.

[0053] Reference Figures 1 to 3 , Figures 9 to 10 In some specific implementations, the external jet tube includes a first external jet tube 220, which includes a first outer tube body 221. The first outer tube body 221 is coaxially arranged with the inner jet tube 100. A first throat 200 is located at the front end of the first outer tube body 221. The minimum radial distance of the first throat 200 is greater than the outer diameter of the inner jet tube 100. The first throat 200 is used to draw the fluid entering from the first inlet 210 into the inner cavity of the first outer tube body 221.

[0054] Understandably, the multi-throat, multi-stage jet mixer formed by the combination of the first external jet pipe 220 and the inner jet pipe 100 involves the first throat 200 performing the initial water-air mixture mixing, and the second throat 120 performing the second water-air mixture mixing. The first throat 200 and multiple second throats 120 increase mixing efficiency through multiple negative pressure suctions, supporting applications in aeration, wastewater treatment, and gas combustion, while reducing equipment development costs. For example, by inputting fluid (water) through the inlet of the first external jet pipe 220 and gas (air, oxygen, or ozone) through the first inlet 210, it can be suitable for small-scale aquaculture ponds, portable live fish transportation, immersion nano-aeration, and ozone sterilization wastewater treatment. Alternatively, by inputting gas (natural gas, propane, etc.) through the inlet of the first external jet pipe 220 and air through the first inlet 210, it can be suitable for industrial natural gas burners and commercial propane stoves.

[0055] Reference Figures 3 to 5, Figures 9 to 10 In some specific implementations, the external jet pipe includes a second external jet pipe 230, which includes a second outer pipe body 231 and a first loop pipe. The second outer pipe body 231 is coaxially arranged with the inner jet pipe 100. The front end of the second outer pipe body 231 is provided with a third throat 232, which is arranged opposite to the inner jet pipe 100. The third throat 232 is used to draw the fluid entering from the first loop pipe into the inner cavity of the second outer pipe body 231. The outer wall of the first loop pipe is provided with a first inlet 210, and the first loop pipe is provided with a first throat 200 for generating negative pressure suction. The first throat 200 connects the inner cavity of the first loop pipe with the first inlet 210. Specifically, the first loop pipe includes a first inlet section 233, a first extension section 234 and a first outlet section 235 connected in sequence. The inlet of the first inlet section 233 is connected to the outer wall of the second outer pipe body 231, and the outlet of the first outlet section 235 is connected to the third throat 232. The first outlet section 235 is provided with a first inlet 210 and a first throat 200.

[0056] Understandably, the multi-throat, multi-stage jet mixer formed by the combination of the second outer jet pipe 230 and the inner jet pipe 100 involves the first throat 200 performing the first water-air mixture, the third throat 232 performing the second water-air mixture, and the second throat 120 performing the third water-air mixture. The first throat 200, the third throat 232, and the multiple second throats 120 increase mixing efficiency through multiple negative pressure suctions, supporting applications in fields such as oxygenation, wastewater treatment, gas combustion, and internal combustion engine fuel, while reducing equipment development costs. For example, by inputting fluid (fuel) through the inlet of the second outer jet pipe 230 and gas (air) through the first inlet 210, it can be applied to automobile engines (passenger cars), marine diesel engines (low-speed two-stroke), and aircraft piston engines.

[0057] Reference Figure 3 , Figures 6 to 10 In some specific implementations, the external jet pipe includes a third external jet pipe 240, which includes a jet inlet 241, a third outer pipe body 242, and a double-loop pipe; the inner jet pipe 100 is fitted with the third outer pipe body 242; the outer wall of the double-loop pipe is provided with a first inlet 210, and the double-loop pipe is provided with a first throat 200 for generating negative pressure suction, the first throat 200 connecting the inner cavity of the double-loop pipe with the first inlet 210;

[0058] Specifically, the double-loop pipe includes a second inlet section 243, a second outlet section 244, a third outlet section 245, a second extension section 246, and a third extension section 247. The jet inlet 241 is connected to the second inlet section 243. The second inlet section 243, the second outlet section 244, and the third outlet section 245 are spaced apart between the third outer pipe body 242 and the second extension section 246, and are connected to the third outer pipe body 242 and the second extension section 246. The outer wall of the third extension section 247 is provided with a first inlet 210. The second outlet section 244 and the third outlet section 245 are each provided with a first throat 200. The two first throats 200 are connected to the two ends of the third extension section 247, respectively. A flow divider 248 is provided inside the jet inlet 241. The flow divider 248 is used to divide the fluid entering from the jet inlet 241.

[0059] It is understandable that the multi-throat multi-stage jet mixer (including type A parallel multi-throat multi-stage jet mixer and type B parallel multi-throat multi-stage jet mixer) formed by the combination of the third outer jet pipe 240 and the inner jet pipe 100, uses a splitter 248 to divide the fluid entering the third outer jet pipe 240 into two streams. For ease of description, the fluid entering the third outer pipe body 242 is referred to as fluid A, and the fluid entering the double-loop pipe is referred to as fluid B. The first throat 200 of the second outlet section 244 performs water-gas mixing (fluid B + gas = mixed fluid a), and the third outlet section... The first throat 200 of section 245 performs water-gas mixing (fluid B portion + gas = mixed fluid b), the second throat 120 opposite to the second outlet section 244 performs water-gas mixing (mixed fluid a + fluid A portion = mixed fluid c), and the second throat 120 opposite to the third outlet section 245 performs water-gas mixing (mixed fluid c + mixed fluid b = mixed fluid d). The first throat 200 and multiple second throats 120 increase mixing efficiency through multiple negative pressure suctions, supporting applications in oxygenation, wastewater treatment, gas combustion, and internal combustion engine fuel, while reducing equipment development costs. For example, fluid (fuel) can be input through the second external jet pipe 230 inlet, and gas (air) can be input through the first inlet 210, making it suitable for automobile engines (passenger cars), marine diesel engines (low-speed two-stroke), and aircraft piston engines.

[0060] This utility model provides an embodiment of the same specification inner jet tube 100 combined with three different outer jet tubes through a detachable connection structure. The outer jet tube can be designed according to actual needs, aiming to form an additional negative pressure to attract and mix compared with the inner jet tube, thus solving the limitation of traditional jet devices that require customized inner and outer tube matching, and greatly reducing the equipment development and replacement costs.

[0061] This utility model utilizes the synergistic effect of multiple throats (first throat 200, second throat 120, third throat 232) with spiral guide 110, conical orifice, etc., to achieve multi-stage acceleration, mixing and pressure regulation of fluid, improve mixing efficiency and working condition adaptability, and meet the multi-working condition requirements from low-pressure fine atomization to high-pressure powerful injection.

[0062] It should be noted that, in order to improve the mixing effect of the inner jet tube 100, when the inner jet tube 100 is provided with multiple second throats 120, the inner diameter of the first throat section 122 of the multiple second throats 120 gradually decreases along the fluid transport direction.

[0063] The first throat 200 and the third throat 232 also adopt the Venturi structure of "contraction section-throat section-expansion section", and are provided with through holes in the circumference for gas or fluid to pass through.

[0064] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-throat, multi-stage jet mixer, characterized in that, It includes an inner jet pipe (100), an outer jet pipe, and a nozzle (300); the inner jet pipe (100) is partially placed inside the outer jet pipe and is detachably connected to the outer jet pipe, and the nozzle (300) is connected to the outlet of the inner jet pipe (100); The outer wall of the external jet tube is provided with a first inlet (210), and the external jet tube is provided with a first throat (200) for generating negative pressure suction. The first throat (200) connects the inner cavity of the external jet tube with the first inlet (210). The inner jet tube (100) has one or more second throats (120), and the second throats (120) are provided with a plurality of first through holes (124) in the circumferential direction.

2. The multi-throat multi-stage jet mixer according to claim 1, characterized in that, The outer wall of the inner jet tube (100) is provided with a spiral guide (110), which is a spiral guide protrusion or a spiral guide groove.

3. The multi-throat, multi-stage jet mixer according to claim 1, characterized in that, The first through hole (124) is a tapered hole, which includes a tapered buffer cavity (125) and a fine hole channel (126). The fine hole channel (126) connects the tapered buffer cavity (125) and the inner cavity of the second throat (120).

4. The multi-throat, multi-stage jet mixer according to claim 1, characterized in that, The first inlet (210) is connected to a four-way solenoid valve (222).

5. The multi-throat, multi-stage jet mixer according to claim 1, characterized in that, The nozzle (300) has a plurality of nozzles (320) on its spray panel (310), and the nozzles (320) are hexagonal.

6. The multi-throat, multi-stage jet mixer according to claim 1, characterized in that, The external jet tube includes a first external jet tube (220), the first external jet tube (220) includes a first outer tube body (221), the first outer tube body (221) is coaxially arranged with the inner jet tube (100), the first throat (200) is arranged at the front end of the first outer tube body (221), the minimum radial distance of the first throat (200) is greater than the outer diameter of the inner jet tube (100), and the first throat (200) is used to draw the fluid entering from the first inlet (210) into the inner cavity of the first outer tube body (221).

7. The multi-throat multi-stage jet mixer according to claim 1, characterized in that, The external jet pipe includes a second external jet pipe (230), which includes a second outer pipe body (231) and a first loop pipe. The second outer pipe body (231) is coaxially arranged with the inner jet pipe (100). The front end of the second outer pipe body (231) is provided with a third throat (232), which is used to draw the fluid entering from the first loop pipe into the inner cavity of the second outer pipe body (231). The outer wall of the first loop pipe is provided with a first inlet (210), and the first loop pipe is provided with a first throat (200) for generating negative pressure suction. The first throat (200) connects the inner cavity of the first loop pipe with the first inlet (210).

8. The multi-throat multi-stage jet mixer according to claim 7, characterized in that, The first loop pipe includes a first inlet section (233), a first extension section (234) and a first outlet section (235) connected in sequence. The inlet of the first inlet section (233) is connected to the outer wall of the second outer pipe body (231), and the outlet of the first outlet section (235) is connected to the third throat (232). The first outlet section (235) is provided with a first inlet (210) and a first throat (200).

9. The multi-throat, multi-stage jet mixer according to claim 1, characterized in that, The external jet pipe includes a third external jet pipe (240), which includes a jet inlet (241), a third outer pipe body (242), and a double-loop pipe; the inner jet pipe (100) is fitted with the third outer pipe body (242); the outer wall of the double-loop pipe is provided with a first inlet (210), and the double-loop pipe is provided with a first throat (200) for generating negative pressure suction, the first throat (200) connecting the inner cavity of the double-loop pipe with the first inlet (210); The double-loop pipe includes a second inlet section (243), a second outlet section (244), a third outlet section (245), a second extension section (246), and a third extension section (247). The jet inlet (241) is connected to the second inlet section (243). The second inlet section (243), the second outlet section (244), and the third outlet section (245) are spaced apart between the third outer pipe body (242) and the second extension section (246), and are connected to the third outer pipe body (242) and the second extension section (246). The third extension section (247) has a first inlet port (210) on its outer wall. The second outlet section (244) and the third outlet section (245) each have a first throat (200). The two first throats (200) are connected to the two ports of the third extension section (247).

10. The multi-throat, multi-stage jet mixer according to claim 9, characterized in that, The jet inlet (241) is provided with a flow divider (248) for dividing the fluid entering from the jet inlet (241).

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