Abrasive water jet nozzle device for assisting deep-sea mining

Abstract

The abrasive water jet spray head device for assisting deep-sea mining comprises a mixing cavity, an accelerating cavity, a developing cavity, a diffusing cavity, an abrasive inlet pipe, a rotational flow plate and a mixer, the mixer comprises a shell, a clockwise-rotating annular propeller, a counter-rotating annular propeller and a bipolar counter-rotating mechanism, and external high-pressure inflow water can directly enter the mixing cavity; abrasive materials can enter the mixing cavity through the abrasive material inlet pipe, the bipolar counter-rotating mechanism can drive the clockwise-rotating annular propeller and the counter-rotating annular propeller to rotate in different directions, the mixing degree of abrasive material water jet flow is improved, then the abrasive material water jet flow enters the accelerating cavity, the abrasive material water jet flow is accelerated through the gradually-shrinking structural design, and the crushing capacity is enhanced; after abrasive water jet enters the development cavity and the diffusion cavity, secondary mixing enhancement is achieved, meanwhile, four rotary outlets are formed through internal rotational flow plates, finally, four clusters of rotary jet can be sprayed out, and during mining operation, the abrasive water jet has excellent diffusion mixing performance and entrainment performance, and disturbance to the environment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of deep-sea mining, and in particular to an abrasive water jet nozzle device for assisting deep-sea mining. Background Art

[0002] During deep-sea mining operations, the collection of polymetallic nodules, sediment disturbance and plume deposition, as well as the discharge of plume waste, not only damage the seabed morphology, but also have adverse effects on the entire ocean water body and the seabed biological habitat environment. Mining structures, as core components, are in direct contact with the seabed, which determines the efficiency of mineral collection and the degree of sediment disturbance. Therefore, there is an urgent need to establish a design method for efficient, low-disturbance, and environmentally friendly polymetallic nodule collection devices.

[0003] In the existing technology, deep-sea mining vehicles directly cut and crush seabed strata and polymetallic nodule ores through mechanical tools or drill bits installed at the front end, which will cause rapid wear of the mechanical tools. At the same time, the mining process will generate high heat, which will accelerate the wear of the mechanical tools. Considering that deep-sea mining operations are carried out on the deep seabed, the maintenance of mining vehicles is difficult, which will seriously affect the mining efficiency and may even cause deformation or damage of the mechanical tools, resulting in interruption of mining operations.

[0004] Secondly, in the existing technology, the mechanical cutters of deep-sea mining vehicles will cause a large amount of clay particles to be lifted up when breaking the seabed strata, and spread into the surrounding seawater, forming a so-called plume. The diffusion, suspension and fall of the plume will seriously affect the field of vision of the mining vehicle, causing movement to be obstructed. At the same time, it will interfere with deep marine life and damage the seabed ecological environment.

[0005] In addition, the water jet mining nozzles installed in deep-sea mining vehicles in the existing technology mainly use conventional conical straight nozzles, which are limited by the depth of deep-sea operations and require extremely high power consumption. In addition, the seabed soil composition is complex, and the conical straight jet mining area is limited. As a result, the mining efficiency of mining vehicles for polymetallic nodules is not high under high energy consumption. Summary of the Invention

[0006] In view of this, the present invention proposes an abrasive water jet nozzle device for assisting deep-sea mining, which improves mining efficiency while avoiding damage to the seabed ecological environment.

[0007] The technical solution of the present invention is achieved as follows: An abrasive water jet nozzle device for assisting deep-sea mining includes a mixing chamber, an acceleration chamber, a development chamber, a diffusion chamber, an abrasive inlet pipe, a swirl plate and a mixer. The mixing chamber, acceleration chamber, development chamber and diffusion chamber are arranged in sequence along the direction of water flow. The interior of the development chamber is arranged as a structure that gradually contracts along the direction of water flow, and the interior of the diffusion chamber is arranged as a structure that gradually expands along the direction of water flow. The abrasive inlet pipe is symmetrically connected to the outer wall of the mixing chamber. The swirl plate is arranged in the development chamber and the diffusion chamber, and it divides the outlet of the diffusion chamber into several rotating outlets; the mixer is arranged in the mixing chamber, and includes a shell, a forward-rotating annular propeller, a reverse-rotating annular propeller and a bipolar reverse-rotation mechanism. The shell is arranged inside the mixing chamber, and the forward-rotating annular propeller and the reverse-rotating annular propeller are arranged on the side of the shell close to the development chamber. The bipolar reverse-rotation mechanism is arranged inside the shell, and is used to drive the forward-rotating annular propeller and the reverse-rotating annular propeller to rotate in different directions.

[0008] Preferably, the bipolar counter-rotating mechanism includes a motor, a driving bevel gear, a clockwise bevel gear, a counter-rotating bevel gear, a flange shaft and a clockwise cylinder. The motor is arranged inside the shell, and its output shaft is connected to the driving bevel gear. The driving bevel gear is respectively engaged with the clockwise bevel gear and the counter-rotating bevel gear. The clockwise bevel gear and the counter-rotating bevel gear are arranged opposite to each other. One end of the clockwise cylinder extends into the shell and is connected to the clockwise bevel gear. The clockwise annular propeller is arranged on the outer wall of the clockwise cylinder. One end of the flange shaft is rotatably connected to the inside of the shell, and the other end extends out of the shell and passes through the clockwise cylinder and is connected to the counter-rotating annular propeller. The counter-rotating bevel gear is arranged on the flange shaft.

[0009] Preferably, the bipolar counter-rotating mechanism further includes a supporting bevel gear, which is disposed between the clockwise-rotating bevel gear and the counter-rotating bevel gear and meshes with the clockwise-rotating bevel gear and the counter-rotating bevel gear respectively.

[0010] Preferably, the bipolar anti-rotation mechanism further includes a bearing, the bearing is arranged inside the housing, and the end of the flange shaft located inside the housing is connected to the bearing.

[0011] Preferably, the mixer further comprises a motor base, the motor base is arranged inside the housing, and the motor is arranged on the motor base.

[0012] Preferably, the mixer further comprises a gasket, a washer and a sealing gasket, wherein the gasket and the gasket are arranged inside the clockwise rotating cylinder, the sealing gasket is arranged at the connection between the clockwise rotating cylinder and the clockwise rotating bevel gear, and the flange shaft passes through the sealing gasket, the gasket and the gasket in sequence.

[0013] Preferably, the mixer further comprises a conical top cover and a support column, wherein the conical top cover is arranged on a side of the shell away from the development chamber, and one end of the support column is connected to the outer wall of the shell, and the other end is connected to the inner wall of the mixing chamber.

[0014] Preferably, a plurality of flow guides are arranged in an array on the swirl plate.

[0015] Preferably, the clockwise-rotating annular propeller and the counter-rotating annular propeller both include symmetrically arranged annular blades, and a plurality of bionic teeth are provided on the annular blades.

[0016] Preferably, the abrasive inlet pipe includes an abrasive cylindrical inlet pipe and an abrasive spherical inlet pipe that are alternately connected, the end of the abrasive spherical inlet pipe is embedded in the inside of the abrasive cylindrical inlet pipe, and the internal flow channel of the abrasive spherical inlet pipe is set to a tapered structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. It can produce abrasive water jets with uniform mixing properties. Its excellent crushing performance can effectively crush different soil types under high confining pressure seabed environment, realizing efficient and low-energy mining of polymetallic nodules.

[0018] 2. It can not only effectively enhance the mixing degree of abrasive and high-pressure water and the cavitation effect of the jet, but also effectively maintain the stability of the nozzle and achieve the function of vibration reduction and noise reduction.

[0019] 3. The rotating abrasive water jet can produce excellent diffusion, mixing and entrainment properties. By entraining the surrounding seawater and clay particles raised by mining operations, it can not only cool the mechanical tools to a certain extent, but also reduce the disturbance of the seabed environment, thus greatly improving the environmental friendliness of the mining operation.

[0020] 4. By arranging multiple mixing and turbulence enhancement synergistic subsystems, it is ensured that the nozzle can produce abrasive water jets with uniform mixing and good cavitation characteristics.

[0021] 5. By adopting the step-by-step chamber design, the structure is simple and reasonable, with good installation flexibility and structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic structural diagram of an abrasive water jet nozzle device for assisting deep-sea mining according to the present invention; Figure 2 This is a cross-sectional view of an abrasive water jet nozzle device for assisting deep-sea mining according to the present invention; Figure 3This is a schematic structural diagram of a mixer of an abrasive water jet nozzle device for assisting deep-sea mining according to the present invention; Figure 4 A cross-sectional view of a mixer of an abrasive water jet nozzle device for assisting deep-sea mining according to the present invention; Figure 5 This is a schematic structural diagram of a bipolar reverse rotation mechanism of an abrasive water jet nozzle device for assisting deep-sea mining according to the present invention; Figure 6 This is a schematic structural diagram of a swirl plate of an abrasive water jet nozzle device for assisting deep-sea mining according to the present invention; Figure 7 This is a schematic structural diagram of a counter-rotating annular propeller of an abrasive water jet nozzle device for assisting deep-sea mining according to the present invention; Figure 8 This is a schematic structural diagram of an abrasive cylindrical inlet pipe of an abrasive water jet nozzle device for assisting deep-sea mining according to the present invention; Figure 9 This is a schematic structural diagram of an abrasive spherical inlet pipe of an abrasive water jet nozzle device for assisting deep-sea mining according to the present invention; Figure 10 The time-frequency diagram of outlet pressure oscillation at different diffusion angles; In the figure, 1. mixing chamber; 2. abrasive cylindrical inlet pipe; 3. abrasive spherical inlet pipe; 4. acceleration chamber; 5. development chamber; 6. diffusion chamber; 7. guide body; 8. swirl plate; 9. mixer; 10. support column; 11. conical top cover; 12. motor base; 13. housing; 14. driving bevel gear; 15. motor; 16. clockwise rotating annular propeller; 17. counter-rotating annular propeller; 18. bearing; 19. flange shaft; 20. counter-rotating bevel gear; 21. supporting bevel gear; 22. clockwise rotating bevel gear; 23. clockwise rotating cylinder; 24. gasket; 25. gasket; 26. sealing gasket; 27. annular blade; 28. bionic tooth. DETAILED DESCRIPTION

[0024] In order to better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0025] See also Figures 1 to 9The present invention provides an abrasive water jet nozzle device for assisting deep-sea mining, comprising a mixing chamber 1, an acceleration chamber 4, a development chamber 5, a diffusion chamber 6, an abrasive inlet pipe, a swirl plate 8 and a mixer 9. The mixing chamber 1, the acceleration chamber 4, the development chamber 5 and the diffusion chamber 6 are arranged in sequence along the direction of water flow. The interior of the development chamber 5 is configured to have a structure that gradually contracts along the direction of water flow, and the interior of the diffusion chamber 6 is configured to have a structure that gradually expands along the direction of water flow. The abrasive inlet pipe is symmetrically connected to the outer wall of the mixing chamber 1. The swirl plate 8 is arranged in the development chamber 5 and the diffusion chamber. 6, which divides the outlet of the diffusion chamber 6 into several rotary outlets; the mixer 9 is arranged in the mixing chamber 1, and includes a shell 13, a clockwise rotating annular propeller 16, a counter-rotating annular propeller 17 and a bipolar counter-rotating mechanism, the shell 13 is arranged inside the mixing chamber 1, the clockwise rotating annular propeller 16 and the counter-rotating annular propeller 17 are arranged on the side of the shell 13 close to the development chamber 5, and the bipolar counter-rotating mechanism is arranged inside the shell 13, for driving the clockwise rotating annular propeller 16 and the counter-rotating annular propeller 17 to rotate in different directions.

[0026] The present invention discloses an abrasive water jet nozzle device for assisting deep-sea mining, which consists of a nozzle cavity structure and a mixer 9. The nozzle cavity structure includes a mixing chamber 1, an acceleration chamber 4, a development chamber 5 and a diffusion chamber 6 connected in sequence. An external high-pressure water inlet pipe can be connected to the mixing chamber 1, and an abrasive inlet pipe is provided on the outside of the mixing chamber 1 to supply the abrasive into the mixing chamber 1. After the high-pressure water and the abrasive enter the mixing chamber 1, the abrasive and the high-pressure water are fully and evenly mixed by the clockwise rotating annular propeller 16 and the counter-rotating annular propeller 17 provided in the mixer 9, which can solve the problem of nozzle instability caused by large vibration during the enhanced mixing of the abrasive and water. At the same time, the clockwise rotating annular propeller 16 and the counter-rotating annular propeller 17 are driven by the bipolar counter-rotating mechanism to rotate in different directions, which can further improve the mixing degree of the abrasive water jet and increase the cavitation effect of the high-pressure water flow.

[0027] The acceleration chamber 4 and the diffusion chamber 6 adopt a zooming structure design, wherein the interior of the acceleration chamber 4 is a tapered structure, which can accelerate the abrasive water jet and enhance the crushing ability. The interior of the diffusion chamber 6 is a gradually expanding structure, and the zoom angle is designed to be 40°. This angle design has excellent jet energy retention ability, ensuring that the nozzle will not be blocked by abrasive particles or environmental clay particles. The development chamber 5 and the diffusion chamber 6 serve as the outlet of the nozzle cavity structure, and a swirl plate 8 is set inside. The swirl plate 8 can divide the development chamber 5 and the diffusion chamber 6 into four swirl chambers and form four rotary outlets. The abrasive water jet passes through the development chamber 5 and the diffusion chamber 6. The scattered cavity 6 can achieve secondary mixing enhancement, making the abrasive water jet mixing more uniform. At the same time, four clusters of rotating jets can be ejected from the nozzle. When the mining vehicle is mining, the ejected jet has excellent diffusion mixing and suction properties, and can entrain surrounding clay particles and environmental fluids in a large range, which can not only achieve the effect of cooling the mechanical tool, but also reduce the plume and thus reduce the disturbance to the environment. At the same time, it can maintain the jet energy and ensure the mining and crushing performance of the jet, effectively improving the mining efficiency of polymetallic nodules, and can entrain clay particles raised by mining operations, greatly reducing the disturbance to the environment.

[0028] Preferably, the bipolar counter-rotating mechanism includes a motor 15, a driving bevel gear 14, a clockwise bevel gear 22, a counter-rotating bevel gear 20, a flange shaft 19 and a clockwise cylinder 23. The motor 15 is arranged inside the housing 13, and its output shaft is connected to the driving bevel gear 14. The driving bevel gear 14 is respectively engaged with the clockwise bevel gear 22 and the counter-rotating bevel gear 20. The clockwise bevel gear 22 and the counter-rotating bevel gear 20 are arranged opposite to each other. One end of the clockwise cylinder 23 extends into the housing 13 and is connected to the clockwise bevel gear 22. The clockwise annular propeller 16 is arranged on the outer wall of the clockwise cylinder 23. One end of the flange shaft 19 is rotatably connected to the inside of the housing 13, and the other end extends out of the housing 13 and passes through the clockwise cylinder 23 to be connected to the counter-rotating annular propeller 17. The counter-rotating bevel gear 20 is arranged on the flange shaft 19.

[0029] When the high-pressure water flow and the abrasive are evenly mixed, the motor 15 can be started, and the motor 15 drives the active bevel gear 14 to rotate. The active bevel gear 14 drives the clockwise bevel gear 22 and the counter-rotating bevel gear 20 meshing with the upper and lower sides thereof to rotate in different directions. When the clockwise bevel gear 22 rotates, it drives the clockwise annular propeller 16 to rotate through the clockwise cylinder 23, and when the counter-rotating bevel gear 20 rotates, it drives the flange shaft 19 to rotate. The flange shaft 19 passes through the clockwise bevel gear 22 and extends to the outside of the shell 13, and continues to pass through the clockwise cylinder 23 before connecting with the counter-rotating annular propeller 17, so that the counter-rotating annular propeller 17 can be driven to rotate through the flange shaft 19, thereby realizing the reverse rotation of the clockwise annular propeller 16 and the counter-rotating annular propeller 17, thereby improving the mixing degree of the abrasive water jet.

[0030] Preferably, the bipolar counter-rotating mechanism further includes a supporting bevel gear 21 , which is disposed between the clockwise-rotating bevel gear 22 and the counter-rotating bevel gear 20 and meshes with the clockwise-rotating bevel gear 22 and the counter-rotating bevel gear 20 , respectively.

[0031] In order to ensure that the active bevel gear 14 can smoothly drive the clockwise bevel gear 22 and the counter-rotating bevel gear 20 to rotate, a supporting bevel gear 21 is further provided between the clockwise bevel gear 22 and the counter-rotating bevel gear 20 to realize the supporting function of the clockwise bevel gear 22 and the counter-rotating bevel gear 20 and the effective transmission of the rotational force.

[0032] Preferably, the bipolar anti-rotation mechanism further includes a bearing 18 , which is disposed inside the housing 13 , and the end of the flange shaft 19 located inside the housing 13 is connected to the bearing 18 .

[0033] The provided bearing 18 can support the flange shaft 19 to rotate, thereby driving the counter-rotating annular propeller 17 to rotate.

[0034] Preferably, the mixer 9 further includes a motor base 12 , which is disposed inside the housing 13 , and the motor 15 is disposed on the motor base 12 .

[0035] The motor seat 12 can be used to install the motor 15 so that the motor 15 can stably drive the driving bevel gear 14 to rotate.

[0036] Preferably, the mixer 9 further includes a gasket 24, a washer 25 and a sealing gasket 26. The gasket 24 and the gasket 25 are arranged inside the clockwise rotating cylinder 23. The sealing gasket 26 is arranged at the connection between the clockwise rotating cylinder 23 and the clockwise rotating bevel gear 22. The flange shaft 19 passes through the sealing gasket 26, the gasket 24 and the gasket 25 in sequence.

[0037] A sealing gasket 26 is provided at the bottom of the housing 13 for sealing, and a gasket 24 and a washer 25 are arranged below the sealing gasket 26 to achieve compression of the mixer 9.

[0038] Preferably, the mixer 9 also includes a conical top cover 11 and a support column 10. The conical top cover 11 is arranged on the side of the shell 13 away from the development chamber 5. One end of the support column 10 is connected to the outer wall of the shell 13, and the other end is connected to the inner wall of the mixing chamber 1.

[0039] The conical top cover 11 is installed on the top of the mixer 9, which can effectively realize the drainage effect. In order to ensure the stability of the mixer 9, a support column 10 is provided on its outer surface, which is fixed to the inside of the mixer 9 through the support column 10. When the high-pressure water flow and abrasive enter the mixing chamber 1, they will contact the conical top cover 11. Under the drainage effect of the conical top cover 11, the water flow and abrasive will flow to the positions of the clockwise rotating annular propeller 16 and the counter-rotating annular propeller 17.

[0040] Preferably, a plurality of flow guides 7 are arranged in an array on the swirl plate 8 .

[0041] The swirl plate 8 adopts a spiral structure, and since the interior of the diffusion chamber 6 is a gradually expanding structure, the part of the swirl plate 8 located in the diffusion chamber 6 is also a gradually expanding structure, so as to realize the division of the internal space of the diffusion chamber 6. The design of the guide body 7 can use the Karman vortex street principle to increase the turbulence of the jet, thereby improving the mixing ability and oscillation performance.

[0042] Preferably, the clockwise-rotating annular propeller 16 and the counter-rotating annular propeller 17 both include symmetrically arranged annular blades 27 , and a plurality of bionic teeth 28 are provided on the annular blades 27 .

[0043] When the rotation speed increases, the mixing of abrasive particles and high-pressure water and the occurrence of blade cavitation effect will cause strong vibration and noise. The forward-rotating annular propeller 16 and the counter-rotating annular propeller 17 of the present invention adopt a symmetrically arranged annular blade 27 design, which has excellent vibration and noise reduction effects and can maintain the stability of the nozzle structure. At the same time, based on the bionic design, bionic teeth 28 are respectively provided on the annular blades 27, which can significantly increase the turbulence level of the abrasive water jet, so that the abrasive and high-pressure water can be efficiently and evenly mixed, thereby improving the mining and crushing ability of the nozzle cavity structure in a high-pressure seabed environment.

[0044] Preferably, the abrasive inlet pipe includes an abrasive cylindrical inlet pipe 2 and an abrasive spherical inlet pipe 3 that are alternately connected, the end of the abrasive spherical inlet pipe 3 is embedded in the abrasive cylindrical inlet pipe 2, and the internal flow channel of the abrasive spherical inlet pipe 3 is set to a tapered structure.

[0045] The abrasive cylindrical inlet pipe 2 and the abrasive spherical inlet pipe 3 are alternately connected to realize free bending of the abrasive inlet pipe, and the tapered design of the flow channel of the abrasive spherical inlet pipe 3 can pre-accelerate the abrasive to a certain extent.

[0046] Reference Figure 10 In order to illustrate the effect of the jet development induction technology of the present invention, a specific embodiment is provided.

[0047] This embodiment compares the time-frequency characteristics of different diffusion angles. Figure 10It can be seen from the figure that the unsteady flow of the jet at the outlet has a significant dependence on the diffusion angle, and the nozzles with different diffusion angles have significant differences in instantaneous frequency. For the 27° diffusion angle structure, the jet transient pressure pulsation has the widest frequency band, concentrated in the range of 50-5000Hz, and this frequency band has a significant energy share, indicating that the jet energy is unstable during development under this structure, resulting in the shedding of a large number of cavitation bubbles, which in turn causes the widest energy band. In contrast, the jet with a 40° diffusion angle has a significant energy share in the low-frequency band around 200Hz, and the energy amplitude is concentrated, indicating that the jet energy is relatively stable during development under this structure, with only a few small-scale cavitation bubbles shedding from the mainstream. When the diffusion angle continues to increase to 60°, the pressure pulsation frequency band again shows a significant widening, with the energy concentrated in the range of 50-1000Hz. Its energy stability is obviously inferior to that of the 40° diffusion angle structure. These comparisons show that the 40° diffusion angle design can better maintain the energy stability of the jet, thereby producing a better auxiliary mining effect.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An abrasive water jet nozzle device for assisting deep-sea mining, characterized in that: It includes a mixing chamber, an acceleration chamber, a development chamber, a diffusion chamber, an abrasive inlet pipe, a swirl plate and a mixer. The mixing chamber, acceleration chamber, development chamber and diffusion chamber are arranged in sequence along the water flow direction. The interior of the development chamber is arranged as a structure that gradually contracts along the water flow direction, and the interior of the diffusion chamber is arranged as a structure that gradually expands along the water flow direction. The abrasive inlet pipe is symmetrically connected to the outer wall of the mixing chamber. The swirl plate is arranged in the development chamber and the diffusion chamber, and divides the outlet of the diffusion chamber into several rotating outlets; the mixer is arranged in the mixing chamber, and includes a shell, a forward-rotating annular propeller, a reverse-rotating annular propeller and a bipolar reverse-rotation mechanism. The shell is arranged inside the mixing chamber, and the forward-rotating annular propeller and the reverse-rotating annular propeller are arranged on the side of the shell close to the development chamber. The bipolar reverse-rotation mechanism is arranged inside the shell, and is used to drive the forward-rotating annular propeller and the reverse-rotating annular propeller to rotate in different directions.

2. The abrasive water jet nozzle device for assisting deep-sea mining according to claim 1, characterized in that: The bipolar counter-rotating mechanism includes a motor, a driving bevel gear, a clockwise bevel gear, a counter-rotating bevel gear, a flange shaft and a clockwise cylinder. The motor is arranged inside the shell, and its output shaft is connected to the driving bevel gear. The driving bevel gear is respectively engaged with the clockwise bevel gear and the counter-rotating bevel gear. The clockwise bevel gear and the counter-rotating bevel gear are arranged opposite to each other. One end of the clockwise cylinder extends into the shell and is connected to the clockwise bevel gear. The clockwise annular propeller is arranged on the outer wall of the clockwise cylinder. One end of the flange shaft is rotatably connected to the inside of the shell, and the other end extends out of the shell and passes through the clockwise cylinder to be connected to the counter-rotating annular propeller. The counter-rotating bevel gear is arranged on the flange shaft.

3. The abrasive water jet nozzle device for assisting deep-sea mining according to claim 2, characterized in that: The bipolar counter-rotating mechanism further includes a supporting bevel gear, which is arranged between the clockwise-rotating bevel gear and the counter-rotating bevel gear and meshes with the clockwise-rotating bevel gear and the counter-rotating bevel gear respectively.

4. The abrasive water jet nozzle device for assisting deep-sea mining according to claim 2, characterized in that: The bipolar anti-rotation mechanism further includes a bearing, which is arranged inside the housing, and the end of the flange shaft located inside the housing is connected to the bearing.

5. The abrasive water jet nozzle device for assisting deep-sea mining according to claim 2, characterized in that: The mixer further comprises a motor base, which is arranged inside the shell, and the motor is arranged on the motor base.

6. The abrasive water jet nozzle device for assisting deep-sea mining according to claim 2, characterized in that: The mixer further comprises a gasket, a washer and a sealing gasket, wherein the gasket and the gasket are arranged inside the clockwise rotating cylinder, the sealing gasket is arranged at the connection between the clockwise rotating cylinder and the clockwise rotating bevel gear, and the flange shaft passes through the sealing gasket, the gasket and the gasket in sequence.

7. The abrasive water jet nozzle device for assisting deep-sea mining according to claim 1, characterized in that: The mixer further comprises a conical top cover and a support column. The conical top cover is arranged on a side of the shell away from the development chamber. One end of the support column is connected to the outer wall of the shell, and the other end is connected to the inner wall of the mixing chamber.

8. The abrasive water jet nozzle device for assisting deep-sea mining according to claim 1, characterized in that: A plurality of guide bodies are arranged in an array on the swirl plate.

9. The abrasive water jet nozzle device for assisting deep-sea mining according to claim 1, characterized in that: The clockwise-rotating annular propeller and the counter-rotating annular propeller both include symmetrically arranged annular blades, and a plurality of bionic teeth are provided on the annular blades.

10. The abrasive water jet nozzle device for assisting deep-sea mining according to claim 1, characterized in that: The abrasive inlet pipe comprises an abrasive cylindrical inlet pipe and an abrasive spherical inlet pipe which are alternately connected. The end of the abrasive spherical inlet pipe is embedded in the interior of the abrasive cylindrical inlet pipe. The internal flow channel of the abrasive spherical inlet pipe is set as a tapered structure.

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