Multistage coupling type efficient modular jet device

Abstract

The utility model discloses a multi-stage coupling type efficient modular jet device which comprises a primary jet nozzle, a secondary jet acceleration ring and a third-stage mixing cavity which are connected in series, and jet modules are communicated through jet interstage transition sections. The butt joint end faces of the primary jet flow nozzle, the secondary jet flow accelerating ring and the third-stage mixing cavity are provided with quick-release flanges, a sealing ring set is embedded in an annular groove, and axial positioning is achieved through an interstage positioning pin. The outlet end of the third-stage mixing cavity is connected with a porous medium mixing layer and a diffusion pressurization cavity, the diffusion pressurization cavity is a conical diffusion section, and an outlet rectification grid is fixed at the outlet end of the diffusion pressurization cavity; the primary jet flow nozzle is provided with an opening quick connection end opening, a lateral liquid supplementing opening is formed in the side wall of the secondary jet flow accelerating ring, and an outlet flow dividing device is installed at the tail end of the outlet rectifying grid. According to the multi-stage modular jet device, efficient fluid mixing and conveying are achieved through the multi-stage modular design, and the maintainability and stability of the device are improved while the overall performance of the jet device is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fluid power equipment, specifically relates to a multistage coupling type high -efficient modularization jet device suitable for chemical industry, environmental protection and water treatment field. BACKGROUND

[0002] Now, jet device as the key energy conversion and mixing equipment is widely used in chemical production, sewage treatment and other industrial scenes with complex working conditions, strict energy efficiency requirements and the need for continuous stable operation. The traditional jet device adopts the overall structure design, is not only difficult to maintain, and the performance is poor when processing different media. Although the existing jet device improves the maintenance convenience to some extent, there are still obvious deficiencies in energy efficiency improvement and working condition adaptability.

[0003] At present, the traditional jet device generally adopts single stage venturi structure design, such as the patent with publication number CN111206380A, there are problems such as low energy conversion efficiency, uneven fluid mixing, and due to the adoption of integral casting process, the replacement of internal key wear parts is difficult, and the equipment needs to be completely disassembled during maintenance, which seriously affects the use efficiency. And in the existing improved technology, such as the patent with publication number CN222057716U, the two-stage series structure improves the efficiency to some extent, but the flow field between modules interferes seriously, and still adopts the traditional flange connection mode, the disassembly process is complicated and time-consuming. Although the adjustable nozzle scheme recently appeared improves the working condition adaptability, but lacks the overall modular design concept, and still needs to disassemble most of the components during maintenance, and the actual application effect is limited. In addition, the existing quick release structure generally has defects such as insufficient sealing performance, short service life and the like under high pressure working condition. In view of these problems, it is urgent to develop a new type of modular jet device solution with high efficiency, easy maintenance and reliable sealing performance. UTILITY MODEL CONTENTS

[0004] Based on this, the utility model provides a multistage coupling type high -efficient modularization jet device to solve the problems in the prior art.

[0005] To solve the above technical problems and achieve the above technical effects, the utility model realizes the following technical scheme:

[0006] The application discloses a multi-stage coupling high-efficiency modular fluidic device, which comprises a primary fluidic nozzle, a secondary fluidic accelerating ring and a tertiary mixing cavity which are connected in series, and the adjacent fluidic modules are communicated through a fluidic inter-stage transition section; the abutting end faces of the primary fluidic nozzle, the secondary fluidic accelerating ring and the tertiary mixing cavity are symmetrically provided with quick-release flange connectors, the sealing ring groups are embedded in the annular grooves of the quick-release flange connectors, and the quick-release flange connectors are axially positioned through inter-stage positioning pins; the outlet end of the tertiary mixing cavity is sequentially connected with a porous medium mixing layer and a diffusion plenum, the diffusion plenum is a tapered diffuser section with a polished inner wall, and the outlet end of the diffusion plenum is fixed with an outlet rectification grid; the inlet end of the primary fluidic nozzle is provided with a main inlet quick-connection port, the side wall of the secondary fluidic accelerating ring is provided with a lateral liquid supplementing port, the outer flange of the liquid supplementing port adopts a quick-release connection structure, and the outlet end of the outlet rectification grid is provided with an outlet flow dividing device.

[0007] Further, the primary fluidic nozzle is connected with the secondary fluidic accelerating ring through a quick-release flange, the spiral flow guide groove in the inner wall of the nozzle makes the entering fluid generate rotary motion; the secondary fluidic accelerating ring is connected with the tertiary mixing cavity through a quick-release flange, the flow guide blades in the secondary fluidic accelerating ring further accelerate and rectify the rotary fluid; the tertiary mixing cavity is communicated with the secondary fluidic accelerating ring through a fluidic inter-stage transition section, and the turbulent flow enhancing grid in the cavity promotes fluid mixing; the mixed fluid enters the diffusion plenum to reduce speed and increase pressure, and then is output by the flow dividing device after being adjusted by the outlet rectification grid; the main inlet quick-connection port is connected with the primary nozzle through a flow guide cone, and the lateral liquid supplementing port is communicated with the side wall of the secondary fluidic accelerating ring through a one-way valve for supplementing fluid; the fluidic device shell adopts a split design and is fixed by flange bolts, and the internal support rib plate enhances the structural strength; the sealing ring groups are used in all connection parts to ensure the sealing property, and the positioning pins ensure the abutting precision, and the whole system realizes high-efficiency transmission and mixing of fluid through the modular connection mode.

[0008] Further, the tertiary mixing cavity is a venturi structure optimized cavity, the inlet of the tertiary mixing cavity is connected with the outlet of the secondary fluidic accelerating ring through a fluidic inter-stage transition section, the turbulent flow enhancing grid fixedly installed in the cavity is welded with the inner wall of the cavity, the grid aperture gradually changes from 2mm to 0.5mm along the fluid flow direction, and a gradually changing turbulent flow strength is formed; the fluidic inter-stage transition section is a gradually converging and diverging flow channel, the inlet cross section of the fluidic inter-stage transition section matches the outlet of the secondary fluidic accelerating ring, the minimum cross section smoothly connects with the throat of the tertiary mixing cavity, and the cross section contraction ratio is strictly controlled to be 1:0.6, so that the flow field is smoothly transitioned.

[0009] Further, the quick-release flange connector includes a self-locking buckle and an annular groove, the buckles are symmetrically distributed on the circumference of the flange, and can be quickly locked by rotating 90°; the sealing ring group is stacked and installed in the annular groove by double O-shaped silica gel rings and elastic sealing pads, forming double sealing protection; the inter-stage positioning pin is a tapered pin, symmetrically distributed at the four equal division positions of the flange connecting surface, and the pin hole adopts a taper fit to ensure accurate centering during connection.

[0010] Further, the tapered diffuser section of the diffusion plenum is connected to the outlet of the three-stage mixing chamber through a flange, and the 5° to 8° taper angle design makes the fluid velocity decrease gently and the pressure increase steadily; the inner wall roughness is controlled at Ra≤0.8μm to minimize flow loss; the outlet rectification grid is connected to the outlet of the diffuser section through a flange, and the rotatable blades are installed on the frame through a rotating shaft, and the blade angle can be adjusted within a range of 0° to 45° without limit, for controlling the outlet flow field distribution.

[0011] Further, the front end of the main inlet quick connection port is provided with a streamlined flow guide cone, and the surface of the cone is formed with sharkskin-like drag reduction texture by laser engraving, with a texture depth of 50-100μm; the outlet flow dividing device is connected to the outlet of the rectification grid through a flange, and the three independent channels adopt a 1:1:2 diameter ratio design, corresponding to the center straight flow channel and the two side flow dividing channels respectively, to realize reasonable distribution of the fluid.

[0012] Further, the porous medium mixing layer is connected between the outlet of the three-stage mixing chamber and the inlet of the diffusion plenum through a flange, the honeycomb-like micropore structure is formed by 3D printing process, and the pore distribution gradually changes from 80% at the inlet end to 60% at the outlet end; the one-way valve of the lateral liquid supplementing port is fixed on the side wall of the secondary jet flow acceleration ring through threaded connection, and the valve core adopts a spring pre-tightening design and automatically opens under a pressure difference of 0.05 to 0.1MPa.

[0013] Further, the jet flow device shell is made of split aluminum alloy casting, and the upper and lower shells are connected by flange bolts; the internal support ribs are radially distributed, the rib roots are welded and fixed to the inner wall of the shell, the end portions extend to the module installation flanges, the rib thickness is 1.2 to 1.5 times the shell wall thickness, which ensures the structural strength and controls the weight. The outer surface of the jet flow device shell is processed with an annular reinforcing rib, the rib spacing of the reinforcing rib corresponds to the position of the internal support rib, forming an overall reinforcing structure.

[0014] Further, the quick release flange connector is connected with the fluid input interface through a quick plug-in sealing joint, a guide cone surface is arranged on a butt joint surface of a male end and a female end of the sealing joint, a double buckle locking mechanism is adopted, the male end of the joint is integrally formed with the input interface, and the female end is fixed on the quick release flange connector; the pressure self-compensation sealing ring adopts a V-shaped cross-section design and is installed in a female end annular groove, and the sealing contact pressure can be automatically adjusted according to the system pressure.

[0015] Further, each blade surface of the outlet rectification grid is processed with parallel distributed flow guide grooves, the grooves are in U-shaped cross-section, the depth is uniformly distributed along the blade span, the groove bottom is circularly transitioned, the groove direction forms an angle of 15° with the chord direction of the blade, the depth gradually changes from 0.5mm at the leading edge to 0.2mm at the trailing edge, and the flow is stabilized by destroying the boundary layer vortex structure.

[0016] The utility model discloses a beneficial effect is:

[0017] 1. The utility model discloses a multistage modular design realizes the efficient mixing and energy conversion of fluid, and each functional module adopts a standardized quick release interface connection, thereby ensuring the stable operation of the equipment in complex industrial environments such as chemical industry and environmental protection. The unique Venturi structure optimizes the cavity and cooperates with the turbulent flow enhancement grid design, so that the fluid mixing efficiency is significantly improved, and the energy consumption loss is reduced.

[0018] 2. The utility model discloses a quick release flange connection structure, equipped with a self-locking buckle and a precision conical positioning pin system, so that each module can be disassembled and maintained in a short time. This design not only greatly shortens the equipment downtime and improves the production continuity, but also solves the technical problem of difficult maintenance of traditional jet flow devices.

[0019] 3. The utility model discloses an intelligent cooperation of an adjustable flow rate nozzle and a variable angle guide vane, which innovatively realizes the self-adaptive adjustment of the equipment to different viscosity media and flow changes. The gradient pore design of the multi-pore medium mixing layer further enhances the working condition adaptability, so that the equipment maintains excellent performance in complex industrial environments.

[0020] 4. The utility model discloses an aviation grade split type shell design, and a radial reinforcement support structure is arranged inside. The shell material is selected from high-strength aluminum alloy, which is subjected to special heat treatment process to realize lightweight while ensuring the strength of the equipment, thereby greatly facilitating internal maintenance and maintenance operations.

[0021] 5. The utility model discloses a flow channel design optimized by computational fluid dynamics and a sharkskin surface treatment process, which reduces the fluid flow resistance to the lowest level in the industry. The mirror-polished inner wall (Ra≤0.8μm) of the diffusion booster cavity and the flow guide groove design of the rectification grid work together to significantly reduce energy loss and significantly improve operating efficiency.

[0022] 6. The key components of the utility model adopt innovative material combination: high purity alumina ceramic is used to primary nozzle, 17-4PH stainless steel base body + tungsten carbide coating is adopted to guide vane, special fluorine rubber is selected to sealing element, make equipment service life extension, maintenance cost is reduced greatly.

[0023] 7. The modular architecture design of the utility model supports flexible function extension and upgrade, users can select and match different specifications of nozzle module, mixing cavity module and control system according to actual demand, flexibly adapt to the customization demand of petrochemical industry, sewage treatment, food pharmaceutical and other industrial fields, and provide all-round fluid treatment solution. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings described herein are used to provide further understanding of the utility model, form a part of the present application, the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute improper limitation to the utility model. In the drawings:

[0025] Figure 1 It is the jet flow device cavity section view of the utility model;

[0026] Figure 2 It is the jet flow device injection part section view of the utility model;

[0027] Figure 3 It is the jet flow device injection part schematic view of the utility model;

[0028] Figure 4 It is the jet flow device overall assembly drawing of the utility model. DETAILED DESCRIPTION

[0029] The preferred embodiments of the utility model will be described in detail below in combination with the drawings, so that the purpose, characteristics and advantages of the utility model can be more clearly understood. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the utility model, but only to illustrate the essential spirit of the technical scheme of the utility model.

[0030] In the following description, certain specific details are set forth in order to provide a thorough understanding of various disclosed embodiments. However, one skilled in the relevant arts will recognize that embodiments can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, structures, and processes associated with the present application are not shown or described in order to avoid obscuring embodiments.

[0031] Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise," "comprising," and the like are to be construed in an open, inclusive sense, as opposed to a closed or exclusive sense, that is as "including, but not limited to."

[0032] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0033] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0034] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] See appendix Figure 1 , 2 As shown in Figure 3, a specific implementation of a multi-stage coupled high-efficiency modular jet ejector is described. This jet ejector achieves efficient fluid transport and mixing functions through optimized structural design and modular connection methods. The jet ejector mainly consists of three core modules: a primary jet nozzle 1, a secondary jet acceleration ring 2, and a tertiary mixing chamber 3. The modules are seamlessly connected through specially designed inter-stage transition sections 4. This modular design not only improves the overall performance of the jet ejector but also greatly enhances the maintainability and adaptability of the equipment.

[0036] The primary jet nozzle 1, as the inlet component of the entire system, directly affects the flow characteristics of the subsequent fluid through its structural design. This nozzle is made of wear-resistant ceramic material, and its inner wall is machined with precise spiral guide grooves. This special structure effectively guides the fluid to form a stable rotating flow. The nozzle inlet end is equipped with a main inlet quick-connect port 11, and a specially treated guide cone 14 is installed at the front end of the port. The surface of the cone is coated with a sharkskin-like drag-reducing textured coating 15. This surface treatment technology significantly reduces fluid flow resistance.

[0037] The secondary jet acceleration ring 2 is tightly connected to the primary jet nozzle 1 via a quick-release flange connector 5. Its sidewall has a lateral replenishment port 12, which incorporates a one-way valve structure to ensure unidirectional fluid flow. The acceleration ring's interior is circumferentially and uniformly distributed with guide vanes. The inclination angle of these vanes is carefully designed, gradually changing from 15° at the inlet to 30° at the outlet, forming a gradually expanding flow channel structure. This design not only further accelerates the fluid but also promotes thorough mixing of different fluids.

[0038] The three-stage mixing chamber 3 is designed with a Venturi structure, and is connected smoothly with the secondary jet accelerating ring 2 through the jet stage transition section 4. A turbulence enhancement grid is fixedly installed inside the mixing chamber, which is arranged along the fluid flow direction, with the upstream end fixedly connected with the chamber inlet section and the downstream end extending to the start position of the diffusion section. This structure design significantly enhances the turbulent mixing effect of the fluid. The mixing chamber outlet end is connected with a porous medium mixing layer 8 and a diffusion plenum 9 in sequence, forming a continuous fluid channel.

[0039] The quick-release flange connector 5 is an important connecting component of the jet device, including a self-locking buckle and an annular groove structure. A sealing ring set 6 is embedded in the annular groove of the connector, which is composed of a double O-shaped silica gel ring and an elastic sealing gasket, ensuring good sealing performance under various working conditions. The inter-stage positioning pins 7 are designed as tapered pins and are symmetrically distributed on the flange connection surface, ensuring accurate centering when connecting the modules.

[0040] The diffusion plenum 9 is a tapered diffuser section with polished inner wall, and the tapered wall of the tapered diffuser section smoothly transitions to the mounting flange of the outlet straightener 10. The outlet end of the diffusion plenum 9 is fixed with an outlet straightener 10, which is composed of a number of rotatable blade annular arrays. Each blade is installed on the straightener frame through a shaft, and an angle adjustment mechanism is provided between the blade shaft and the straightener frame, which can adjust the blade angle as needed.

[0041] The main inlet quick connection port 11 is provided with a flow guide cone 14 at the front end, and the surface of the flow guide cone is coated with a sharkskin drag reduction texture coating 15. The outlet end of the outlet straightener 10 is provided with an outlet flow dividing device 13, which includes three independent channels with a diameter ratio of 1:1:2, and can allocate flow according to actual needs.

[0042] The porous medium mixing layer 8 is a whole honeycomb structure, which is fixedly connected with the outlet end of the three-stage mixing chamber 3 through flange connection at the front end, and is sealingly connected with the inlet end of the diffusion plenum 9 at the rear end. The honeycomb-like micro-pore structure is uniformly distributed along the fluid flow direction, and the pore axis is arranged at an angle of 15° to the main flow direction. This structure design effectively promotes the microscopic mixing of the fluid.

[0043] The jet flow device shell 16 adopts a split aluminum alloy structure, which is divided into two detachable front and rear sections in the axial direction, and is tightly connected through an annular flange and bolts. The inner wall of the shell 16 is uniformly distributed with radial support ribs 17, which continuously extend along the length direction of the shell 16, the front end is connected with the primary jet flow nozzle 1 mounting seat, and the rear end extends to the outlet rectifier grid 10 fixing flange. The outer surface of the shell 16 is processed with an annular reinforcing rib, the rib spacing of the reinforcing rib corresponds to the position of the internal support rib 17, and a whole reinforcing structure is formed. The support rib 17 is in a T-shaped structure, the web thickness is 1.3 times the wall thickness of the shell 16, and the flange width is 2 times the web thickness, and such a reinforcing structure design ensures the structural strength and stability of the jet flow device as a whole.

[0044] During installation, first, the primary jet flow nozzle 1 is connected with the system pipeline through the quick-release flange connector 5, and it is ensured that the flow cone 14 of the main inlet quick connection port 11 is correctly oriented. Then, the secondary jet flow acceleration ring 2 and the tertiary mixing chamber 3 are installed in sequence, and attention is paid to checking the connection sealing of the jet flow interstage transition section 4, and it is ensured that the sealing ring set 6 is installed in place. During the installation process, special attention should be paid to the alignment of the interstage positioning pin 7 to ensure the coaxiality of each module. Finally, the multi-hole medium mixing layer 8, the diffusion booster chamber 9 and the outlet rectifier grid 10 are installed, and the fastening condition of all flange connection parts is checked.

[0045] Before use, first, it is necessary to confirm that the support rib 17 of the jet flow device shell 16 is firmly installed, and there is no looseness at each connection part. Check whether the function of the one-way valve of the lateral liquid supplementing port 12 is normal, and ensure that the opening and closing pressure difference is within the range of 0.05 to 0.1 MPa. Adjust the blade angle of the outlet rectifier grid 10 to the initial position 0°, and check whether the rotating mechanism is flexible. Perform sealing test on the quick plug-in sealing joint 18 of the main inlet quick connection port 11, and ensure that the pressure self-compensating sealing ring works normally. Finally, low-pressure medium is introduced for trial operation, and whether there is leakage at each part is observed.

[0046] During use, when processing high-viscosity fluid, the inlet pressure of the primary jet flow nozzle 1 can be appropriately increased, and the guide vane angle of the secondary jet flow acceleration ring 2 is adjusted to the range of 20°-30°. By observing the working state of the multi-hole medium mixing layer 8, the liquid supplementing amount of the lateral liquid supplementing port 12 can be adjusted in real time. The blade angle of the outlet rectifier grid 10 can be adjusted within the range of 0° to 45° according to the output pressure demand to obtain the best flow state. During operation, the sealing condition of the quick-release flange connector 5 should be checked regularly, and the sealing ring set 6 should be replaced in time if leakage is found.

[0047] In terms of maintenance, the inside of the jet device should be cleaned after each use, paying special attention to removing blockages from the micro-holes of the porous medium mixing layer 8. The inside wall of the primary jet nozzle 1, made of wear-resistant ceramic, should be checked for wear after a certain amount of time and replaced if necessary. The surface of the flow channel of the jet stage transition section 4 should be polished regularly to maintain its smoothness. The support rib plates 17 of the jet device housing 16 should be checked for deformation to ensure structural strength. When stored, the modules should be disassembled and stored separately to avoid deformation of the connection parts under long-term pressure.

[0048] In terms of safety precautions, it is strictly prohibited to operate the system when the pressure exceeds the design value to prevent the quick-release flange connector 5 from bursting. When operating the lateral liquid supplement port 12, the system pressure should be lowered first to avoid injury caused by high-pressure fluid backflow. When disassembled for maintenance, the system should be completely depressurized first, and special attention should be paid to the high-pressure medium that may be left in the three-stage mixing chamber 3. When replacing the seal ring set 6, only original factory parts should be used to ensure sealing performance. The operator should wear protective equipment to avoid contact with high-speed flowing media or sharp metal parts.

[0049] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0050] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A multi-stage coupled, high-efficiency modular jet ejector, characterized in that: The system includes a primary jet nozzle (1), a secondary jet acceleration ring (2), and a tertiary mixing chamber (3) connected in series. Adjacent jet modules are connected by a jet stage transition section (4). The mating surfaces of the primary jet nozzle (1), the secondary jet acceleration ring (2), and the tertiary mixing chamber (3) are symmetrically equipped with quick-release flange connectors (5). The annular groove of the quick-release flange connector (5) is embedded with a sealing ring group (6) and is axially positioned by an interstage positioning pin (7). The outlet end of the tertiary mixing chamber (3) is connected in series with a porous medium mixing layer (8) and a diffusion boosting chamber (9). The diffusion boosting chamber (9) is a conical diffuser section with a polished inner wall. Its outlet end is fixed with an outlet rectifier grid (10). The inlet end of the primary jet nozzle (1) is provided with a main inlet quick-connect port (11). The side wall of the secondary jet acceleration ring (2) is provided with a lateral liquid replenishment port (12). The end of the outlet rectifier grid (10) is equipped with an outlet diverter device (13).

2. The multi-stage coupled high-efficiency modular jet ejector according to claim 1, characterized in that: The outlet end of the primary jet nozzle (1) is coaxially connected to the inlet end of the secondary jet acceleration ring (2) via a quick-release flange connector (5). The inner wall of the nozzle is provided with a spiral guide groove. The outlet end of the secondary jet acceleration ring (2) is connected to the inlet end of the tertiary mixing chamber (3) via a jet stage transition section (4). Guide vanes are evenly distributed in the circumferential direction inside the acceleration ring. The vane inclination angle gradually changes from 15° on the inlet side to 30° on the outlet side. The outlet end of the tertiary mixing chamber (3) is sequentially connected to a porous medium mixing layer (8) and a diffusion pressurization chamber (9) to form a continuous fluid channel.

3. The multi-stage coupled high-efficiency modular jet ejector according to claim 1, characterized in that: The three-stage mixing chamber (3) adopts a Venturi structure optimization design. Its inlet section is smoothly connected to the secondary jet acceleration ring (2) through the jet stage transition section (4). The jet stage transition section (4) is a gradually narrowing and expanding flow channel. Its minimum cross section smoothly transitions to the throat of the three-stage mixing chamber (3). A turbulence enhancement grid is fixedly installed inside the three-stage mixing chamber (3). The grid is arranged along the fluid flow direction. Its upstream end is fixedly connected to the inlet section of the chamber, and its downstream end extends to the starting position of the diffusion section. The inlet end of the diffusion pressurization chamber (9) is connected to the outlet end of the three-stage mixing chamber (3) through a flange to form a continuous flow channel structure.

4. The multi-stage coupled high-efficiency modular jet ejector according to claim 1, characterized in that: The quick-release flange connector (5) includes a self-locking buckle and an annular groove. The sealing ring assembly (6) is composed of double O-ring silicone rings and elastic sealing gaskets stacked together. The interstage positioning pin (7) is a tapered pin, symmetrically distributed on the flange connection surface.

5. A multi-stage coupled high-efficiency modular jet ejector according to claim 1, characterized in that: The conical diffuser section of the diffusion booster chamber (9) is connected to the outlet end of the three-stage mixing chamber (3) via a flange connection. The conical wall of the conical diffuser section smoothly transitions to the mounting flange of the outlet rectifier grid (10). The outlet rectifier grid (10) is composed of several rotatable blades arranged in a ring array. Each blade is mounted on the rectifier grid frame via a rotating shaft. An angle adjustment mechanism is provided between the blade rotating shaft and the rectifier grid frame, so that the blades can be angled within the fluid channel. The inner wall of the diffusion booster chamber (9) is precision machined to ensure the smoothness of fluid flow. The mounting flange of the outlet rectifier grid (10) is connected to the subsequent pipeline system using a standard flange connection.

6. The multi-stage coupled high-efficiency modular jet ejector according to claim 1, characterized in that: The main inlet quick-connect port (11) is provided with a flow guide cone (14) at the front end. The surface of the flow guide cone (14) is coated with a sharkskin-like drag-reducing texture coating (15). The outlet diversion device (13) includes three independent channels with a diameter ratio of 1:1:

2.

7. The multi-stage coupled high-efficiency modular jet ejector according to claim 1, characterized in that: The porous media mixing layer (8) is an integral honeycomb structure. Its front end is fixedly connected to the outlet end of the three-stage mixing chamber (3) through a flange connection, and its rear end is sealed to the inlet end of the diffusion boosting chamber (9). The integral honeycomb structure is evenly distributed along the fluid flow direction, and the channel axis is arranged at a 15° angle with the mainstream direction. The valve body of the side liquid replenishment port (12) adopts an embedded installation method, and its valve seat is welded and fixed on the side wall of the secondary jet acceleration ring (2). The valve core achieves one-way opening and closing through spring preload. The external flange of the liquid replenishment port adopts a quick-release connection structure, which is convenient for maintenance and replacement.

8. A multi-stage coupled high-efficiency modular jet ejector according to claim 1, characterized in that: The ejector housing (16) adopts a split aluminum alloy structure, which is divided into two detachable sections along the axial direction. It is tightly connected by annular flanges and bolts. Radial support ribs (17) are evenly distributed on the inner wall of the housing (16). The ribs (17) extend continuously along the length of the housing (16). The front end is connected to the mounting seat of the primary jet nozzle (1) and the rear end extends to the fixing flange of the outlet rectifier grid (10). The cross section of the support rib (17) is T-shaped. Its web thickness is 1.3 times the wall thickness of the housing (16) and the flange width is 2 times the web thickness. The outer surface of the housing (16) is processed with annular reinforcing ribs. The spacing of the reinforcing ribs corresponds to the position of the internal support ribs (17) to form an overall reinforced structure.

9. A multi-stage coupled high-efficiency modular jet ejector according to claim 1, characterized in that: The quick-release flange connector (5) and the main inlet quick-connect port (11) are quickly connected through a quick-plug sealing joint (18). The sealing joint (18) adopts a double snap-locking mechanism. The female end of the sealing joint (18) is fixed on the quick-release flange connector (5), and the male end is integrally formed with the main inlet quick-connect port (11). The pressure self-compensating sealing ring is designed with a V-shaped cross section and is embedded in the annular groove of the female end of the joint. Under the action of fluid pressure, it can automatically adjust the sealing contact pressure to ensure good sealing performance under different working conditions. The male and female end mating surfaces of the sealing joint (18) are provided with guide cone surfaces to facilitate quick alignment and insertion.

10. A multi-stage coupled high-efficiency modular jet ejector according to claim 1, characterized in that: Each blade of the outlet rectifier grid (10) has parallel flow-guiding grooves on its frontal surface. The grooves are angled at 15° with the blade chord direction. The grooves have a U-shaped cross-section and a uniform depth along the blade span. The bottom of the grooves is rounded. The flow-guiding grooves start at the leading edge of the blade and extend to 5 mm before the trailing edge of the blade, forming a complete boundary layer control structure. The spacing between adjacent grooves is 1 / 3 of the blade width. Flow stability is achieved by disrupting the boundary layer vortex structure.

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