Centrifugal vibration combined type multi-stage particle screening device and screening method for deep-sea sediments

Abstract

The invention provides a deep-sea sediment centrifugal vibration combined type particle multi-stage screening device and method, the device comprises a stirring unit, a screening unit and a transparent conveying pipe, and the screening unit comprises a centrifugal screening system, a vibration auxiliary system, a drying system, a collecting and weighing system and a self-cleaning system. According to the technical scheme, the screening efficiency of cohesive soil particles is remarkably improved, the particle size grading error is reduced, and a solution is provided for accurate and efficient grading of fine-grained sediment. Four-stage precise grading of soil particles can be achieved through single-time operation, the screening efficiency is remarkably improved compared with a single-layer structure, manual intervention links are effectively reduced, and the single-time test time is obviously shortened compared with a traditional method. The filter screen can be periodically excited, and high-pressure water mist washing in a self-cleaning mode is combined, so that particle adhesion is effectively eliminated, the blockage rate of the filter screen is reduced, and the continuous operation service life of equipment is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of basic geotechnical testing, and in particular to a deep-sea sediment centrifugal vibration composite particle multi-stage screening device and a screening method. Background Art

[0002] Sediment particle screening is a fundamental test in geological engineering investigation. By quantitatively measuring the content of each particle size group, it provides key data support for engineering classification, mechanical property evaluation and engineering design.

[0003] Sediment particle analysis tests typically employ a nested sieve screening method, whereby soil samples are graded and screened through a series of standard soil sieves of varying apertures. Alternatively, a single vibrating device can be used for particle screening, whereby soil particles are washed and screened using vibration-assisted high-pressure water jets. Both methods suffer from the disadvantages of incomplete screening, the tendency of fine particles to clumping together and resulting in sieve clogging, and high operator labor intensity. Furthermore, deep-sea sediment particles are relatively small, making them difficult to fully screen. The present invention proposes a fully automated, centrifugal-vibration composite particle multi-stage screening device and screening method for deep-sea sediments to address these issues. Summary of the Invention

[0004] In order to make up for the shortcomings of the existing technology, the present invention provides a deep-sea sediment centrifugal vibration composite particle multi-stage screening device and screening method, and provides a sediment particle screening device with material pretreatment, dynamic centrifugal screening, sediment particle multi-stage screening, integrated drying and weighing, and self-cleaning functions to improve screening efficiency and equipment automation level.

[0005] The present invention is achieved through the following technical solutions: a deep-sea sediment centrifugal vibration composite particle multi-stage screening device, comprising a stirring unit, a screening unit and a transparent conveying pipe, the stirring unit comprising a stirring drive motor, a stirrer bracket and a stirrer chamber, the stirrer chamber being fixedly mounted on the stirrer bracket, the stirring drive motor being fixedly mounted on the top of the stirrer chamber, the output shaft of the stirring drive motor being rigidly connected to a stirring paddle, a water inlet being provided on the upper side wall of the stirrer chamber, the lower portion of the stirrer chamber being funnel-shaped, a discharge port being provided at the conical end of the bottom of the stirrer chamber and a built-in coarse filter, and a water level monitoring device being provided on the inner wall of the stirrer chamber; The screening unit includes a box-shaped shell, a feed port is provided on the top of the box-shaped shell and is covered with a sealing cover, a fine particle collection bin with a top opening is built in the box-shaped shell, a side wall air duct is provided between the outer wall of the fine particle collection bin and the inner wall of the box-shaped shell, an annular spray pipe is provided on the top wall of the inner cavity of the box-shaped shell, a bottom base is fixedly installed at the bottom of the inner cavity of the box-shaped shell, a centrifugal drive motor is installed on the bottom base, and the output end of the centrifugal drive motor is connected to the collection box bracket through a coupling, an electromagnetic exciter is installed on the side wall of the collection box bracket, a screening particle collection box is fixedly installed on the collection box bracket, and a fine particle outlet pipe extending to the outside of the box-shaped shell is provided at the bottom of the fine particle collection bin; three-stage replaceable cylindrical screens are built in the fine particle collection bin, each stage of the cylindrical screen includes a cylindrical filter, a filter bracket is provided on the outside of the cylindrical filter, and filter fixing magnets are respectively provided at the top and bottom ends of the inner side of the cylindrical filter; the screening particle collection box is "middle high, four The third step collecting box is annular and has a height decreasing successively, and its top edge is aligned with the bottom end of the second and third stage screen respectively, and the whole is arranged in a circular array; the top of each step collecting box of the screening particle collecting box is equipped with an automatic collecting box cover with an automatic opening and closing device, and the side walls of each step collecting box of the screening particle collecting box are double-layer structures, namely the outer wall of the collection box and the inner wall of the collection box, an air inlet is provided on the outer wall of the collection box, and a plurality of drying air outlets are provided on the inner wall of the collection box, a heating coil is provided between the outer wall of the collection box and the inner wall of the collection box, and an independent weighing module is provided at the bottom of each step collecting box of the screening particle collecting box, and a control panel is installed on the outer wall of the box-shaped shell, which is connected to the centrifugal drive motor, the electromagnetic exciter, the weighing module and the automatic opening and closing device; One end of the transparent conveying tube is connected to the discharge port, and the other end is connected to the feed port.

[0006] As a preferred option, the inner surface of the mixer cavity is mirror polished to effectively reduce the adhesion of highly viscous soil samples.

[0007] As a preferred solution, a rubber sealing ring is configured at the interface of the water inlet.

[0008] As a preferred solution, the mixer bracket is provided with a height adjustment bolt, which can lift the mixer to a position higher than the screening unit, and utilize gravity potential energy to achieve gravity transport of the pretreated soil sample to the screening unit.

[0009] As a preferred solution, the stirring paddle is a pitch-blade stirring paddle structure, and the blade plane is inclined to the axis, which can enhance the shearing and crushing effect on the agglomerated soil lumps.

[0010] As a preferred solution, the box-shaped shell is made of stainless steel, and the outer wall of the box-shaped shell is embedded with a double-layer tempered glass observation window to support real-time monitoring of the screening operation status.

[0011] As a preferred solution, the box-shaped shell is made of stainless steel, and the outer wall of the box-shaped shell is embedded with a double-layer tempered glass observation window to support real-time monitoring of the screening operation status.

[0012] As a preferred embodiment, the automatic opening and closing device includes a connecting rod shaft, a hydraulic telescopic rod, a fixing bolt, a hinge, and a connecting arm. The automatic collection box cover is connected to the inner wall of the collection box by a hinge for relative rotation. The connecting arm is mounted on the back of the automatic collection box cover by a fixing bolt. The connecting rod shaft is fixedly mounted on the inner wall of the collection box. The bottom end of the hydraulic telescopic rod is sleeved on the connecting rod shaft. The top end of the hydraulic telescopic rod is connected to the connecting arm. The hydraulic telescopic rod is in communication with the control panel. A screening method for a deep-sea sediment centrifugal vibration composite particle multi-stage screening device specifically comprises the following steps: S1: Equipment assembly and pre-inspection: Assemble the equipment according to requirements and select appropriate coarse filter specifications; S2: Add sample: Place the sample to be screened into the mixer chamber; connect it to the water supply line through the water inlet on the side wall; S3: Start the mixer: activate the stirring drive motor and run it at the preset speed. At the same time, turn on the switch at the water inlet. At the same time, the water level monitoring device on the inner wall of the chamber monitors the water level in real time. If the water level exceeds 80% of the volume, an alarm is triggered and water injection is stopped. The soil sample and water are fully mixed into a homogeneous suspension. At the same time, the suspension is filtered through the coarse filter at the bottom to ensure uniform mixing. Under the action of gravity, it enters the screening unit through the transparent guide tube; S4: Start the centrifugal screening machine: Activate the centrifugal drive motor to rotate the screening chamber inside the fine particle collection bin, generating a gradient of centrifugal acceleration at the cylindrical screens of different specifications. The screen holes of the cylindrical screens gradually decrease from the inside to the outside, and the sediment particles can undergo three levels of screening in sequence; synchronously start the electromagnetic exciter to form a synergistic screening effect of centrifugal force and mechanical vibration; S5: Screening particle collection and weighing: After the screening is completed, the fine particle outlet pipe is opened to collect the screened particles with the smallest particle size; then the automatic collection box cover of the corresponding particle size level is controlled to open, so that the particles in the screening chamber flow into the screening particle collection box in a directional manner, and the annular spray pipe at the top of the screening device is opened simultaneously; after complete collection, the heating coil located in the interlayer of the collection box is started to heat the air blown in from the air inlet, and finally enters the screening particle collection box of each stage through the drying air outlet. At the same time, the particle mass change is monitored in real time through the weighing module at the bottom of the box. When the particle mass is stable, the system automatically determines that the drying is complete and closes the ventilation to record the last stable value as the mass of the sediment particles after drying; After weighing, open the collection box outlet on the side of the screening machine, take out the automatic collection box cover, and number it for future use. S6: Self-cleaning of the device: Inject clean water into the annular spray pipe and drive the centrifugal drive motor at the same time to form a turbulent water film to flush the cylindrical screen and the inner wall of the fine particle collection bin; after cleaning is completed, start the side wall air duct to blow in dry air.

[0013] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art: 1. This invention utilizes a screening method that combines centrifugal and vibration forces, overcoming the limitations of a traditional single-drive mode and effectively overcoming the agglomeration of clay particles. Compared to traditional single-mode screening machines, which suffer from incomplete screening, clumping of fine particles that clog the sieve holes, and cumbersome and labor-intensive operation, this invention significantly improves the screening efficiency of clay particles and reduces particle size classification errors, providing a solution for the precise and efficient classification of fine-grained sediments.

[0014] 2. The present invention basically constructs a fully closed-loop automated system for stirring pretreatment, multi-stage screening, hot air drying, screening result collection, data recording, and device self-cleaning. At the same time, a three-level gradient screen is provided, and four-level precise classification of soil particles can be achieved in a single operation. The screening efficiency is significantly improved compared with the single-layer structure, and manual intervention is effectively reduced. The single test time is significantly shortened compared with traditional methods.

[0015] 3. The present invention can automatically collect the sieved sample particles after screening, effectively avoiding loss during sample transfer and improving the accuracy of experimental results. In addition, the high-precision weighing module is linked with the real-time data acquisition system to automatically generate the particle grading curve and store it in the database, further simplifying the experimental steps and improving experimental efficiency.

[0016] 4. The present invention sets an electromagnetic exciter to generate vibration, which can periodically excite the filter. Combined with the high-pressure water mist flushing in the self-cleaning mode, it effectively eliminates particle adhesion, reduces the filter clogging rate, and greatly extends the continuous operation life of the equipment.

[0017] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments with reference to the following drawings, in which: Figure 1 It is a structural schematic diagram of the device of the present invention; Figure 2 is a cross-sectional view of a mixer according to the present invention; Figure 3 is an internal diagram of the screening unit of the present invention; Figure 4Schematic diagram of the replaceable filter screen of the present application; Figure 5 Schematic diagram of the collection box of the present application; Figure 6 Schematic diagram of the collection box of the present application; Figure 7 Schematic diagram of the automatic collection box cover in the open state; Figure 8 Schematic diagram of the automatic collection box cover in the closed state, wherein, Figures 1 to 8 The correspondence between the reference signs and the components in the drawings is as follows: 1 stirring unit, 2 screening unit, 3 transparent conveying pipe; wherein the stirring unit part 100 stirring drive motor, 101 stirring machine water inlet, 102 stirring machine support, 103 discharge port, 104 stirring paddle, 105 water level monitoring device, 106 stirring machine cavity, 107 coarse filter screen; screening unit part 200 inlet, 201 sealing cover, 202 box-shaped shell, 203 observation window, 204 control panel, 205 fine particle outlet, 206 collection box outlet, 207 multi-stage screen, 208 screen particle collection box, 209 fine particle collection bin, 210 bottom base, 211 coupling and support, 212 centrifugal drive motor, 213 collection box support, 214 electromagnetic exciter, 215 weighing module, 216 drying air inlet, 217 side wall air duct, 218 annular spray pipe, 2071 filter screen support, 2072 multi-specification filter screen, 2073 magnetic filter screen fixing plate, 2081 automatic collection box cover, 2082 air inlet, 2083 collection box outer wall, 2084 heating coil, 2085 collection box inner wall, 2086 connecting rod shaft, 2087 hydraulic telescopic rod, 2088 fixing bolt, 2089 hinge. DETAILED DESCRIPTION

[0019] In order to enable the above-mentioned objects, features and advantages of the present application to be more clearly understood, the following further describes the present application with reference to the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0020] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0021] The following will be described in conjunction with Figures 1 to 8 The deep-sea sediment centrifugal vibration composite particle multi-stage screening device and the screening method of the embodiments of the present application will be specifically described.

[0022] As Figure 1As shown in the figure, the present invention proposes a deep-sea sediment centrifugal vibration composite particle multi-stage screening device, which includes a stirring unit 1, a screening unit 2 and a transparent conveying pipe 3, wherein the screening unit further includes a centrifugal screening system, a vibration auxiliary system, a drying system, a collection and weighing system and a self-cleaning system. Figure 2 As shown, the mixing unit 1 includes a mixing drive motor 100, a mixer bracket 102 and a mixer chamber 106. The mixer chamber 106 is fixedly mounted on the mixer bracket 102. The mixer bracket 102 is provided with a height adjustment bolt, which can lift the mixer to a position higher than the screening unit, and use the gravity potential energy to achieve gravity transport of the pretreated soil sample to the screening unit. The mixing drive motor 100 is fixedly mounted on the top of the mixer chamber 106. The output shaft of the mixing drive motor 100 is rigidly connected to the mixing paddle 104. The mixing paddle 104 is a pitched-blade mixing paddle structure. The paddle plane is inclined to the axis, which can enhance the shearing and crushing effect on agglomerated soil lumps. A water inlet 101 is provided on the upper side wall of the mixer chamber 106, and a rubber sealing ring is configured at the interface of the water inlet 101. The lower part of the mixer cavity 106 is funnel-shaped, and a discharge port 103 is provided at the conical end of the bottom of the mixer cavity 106 and a coarse filter 107 is built in to filter the unmixed lump samples, thereby ensuring the thoroughness of the mixing pretreatment; a water level monitoring device 105 is provided on the inner wall of the mixer cavity 106, which can detect the water level in real time and feed back to the control system to ensure that the soil-water mixing ratio is maintained within a preset range; the inner surface of the mixer cavity 106 is mirror-polished to effectively reduce the adhesion of high-viscosity soil samples.

[0023] like Figure 3As shown, the screening unit 2 includes a box-shaped shell 202, which is made of stainless steel. The outer wall of the box-shaped shell 202 is embedded with an observation window 202 made of double-layer tempered glass to support real-time monitoring of the screening operation status. A feed port 200 is provided on the top of the box-shaped shell 202 and is covered with a sealing cover 201. A fine particle collection bin 206 with an opening on the top is built into the box-shaped shell 202. A side wall air duct 216 is provided between the outer wall of the fine particle collection bin 206 and the inner wall of the box-shaped shell 202 for drying the equipment during the self-cleaning stage; an annular spray pipe 217 is provided on the top wall of the inner cavity of the box-shaped shell 202, and high-pressure water mist is provided through the uniform fan-shaped nozzle thereon for full coverage flushing of the filter in the self-cleaning mode; a bottom base 209 is fixedly installed on the bottom of the inner cavity of the box-shaped shell 202, and a centrifugal drive motor 211 is installed on the bottom base 209, and the output end of the centrifugal drive motor 211 is connected to the collection box bracket 212 through a coupling 210, and the side wall of the collection box bracket 212 is provided with a Electromagnetic exciter 213, a screening particle collection box 208 is fixedly installed on the collection box bracket 212, and the screening particle collection box 208 drives the screening chamber to rotate along the main axis through the coupling 210, and synchronously links the electromagnetic exciter 212 located at the bottom of the chamber to achieve coordinated screening by centrifugal force and vibration; the screening chamber in the fine particle collection bin 206 is an innovatively designed cylindrical multi-layer structure with a built-in three-stage replaceable screen, and a filter bracket 2071 is provided on the outside of each layer of filter, which can be fixed and replaced with the filter fixing magnets 2072 at the top and bottom ends, so as to achieve accurate classification of soil particles; a fine particle outlet pipe 205 extending to the outside of the box-shaped shell 202 is provided at the bottom of the fine particle collection bin 206; the fine particle collection bin 206 has a built-in three-stage replaceable cylindrical screen 207, such as Figure 4 As shown, each level of the cylindrical screen 207 includes a cylindrical filter 2073, a filter bracket 2071 is provided on the outside of the cylindrical filter 2073, and a filter fixing magnet 2072 is provided at the top and bottom of the inner side of the cylindrical filter 2073; Figure 5 As shown, the screening particle collection box 208 is a three-step stepped circular box with a "high middle and low surroundings". The middle collection box is cylindrical and is the first-step collection box. Its top edge is aligned with the bottom end of the innermost cylindrical screen 207. The second and third-step collection boxes are annular in height and decrease in sequence. The top edges are aligned with the bottom ends of the second and third-step screens respectively. The whole is arranged in a circular array. The top of each step collection box of the screening particle collection box 208 is equipped with an automatic collection box cover 2801 with an automatic opening and closing device. Figure 6As shown, the sidewalls of each stage of the sieved particle collection box 208 are double-layered, comprising an outer wall 2803 and an inner wall 2805. The outer wall 2803 is provided with an air inlet 2802, and the inner wall 2805 is provided with multiple drying air vents 215. A heating coil 2084 is installed between the outer and inner walls 2803 and 2805, respectively. Each collection box is provided with multiple drying air vents 215. After air enters the box through the air inlet 2802, it is heated by the interlayer heating coils 2084, achieving automatic and rapid drying of the particles. Each stage of the sieved particle collection box 208 is equipped with an independent weighing module 214 at its bottom, automatically determining the mass of each particle size after drying. A control panel 204 is mounted on the outer wall of the box-shaped housing 202. The control panel 204 is communicatively connected to the centrifugal drive motor 211, the electromagnetic exciter 213, the weighing module 214, and the automatic opening and closing device. The control panel can be used to set the speed parameters of the centrifugal drive motor and the frequency parameters of the electromagnetic vibrator; after the screening is completed, it can perform a self-cleaning operation, collect the screening particle quality data output by the weighing module in real time, and record and store the weighing data. Figure 7 、 8 As shown, the automatic opening and closing device includes a connecting rod shaft 2086, a hydraulic telescopic rod 2087, a fixing bolt 2088, a hinge 2089 and a connecting arm 2090. The automatic collection box cover 2801 is connected to the inner wall 2805 of the collection box by relative rotation through the hinge 2089. The connecting arm 2090 is installed on the back of the automatic collection box cover 2801 through the fixing bolt 2088, the connecting rod shaft 2086 is fixedly installed on the inner wall 2805 of the collection box, the bottom end of the hydraulic telescopic rod 2087 is mounted on the connecting rod shaft 2086, and the top end of the hydraulic telescopic rod 2087 is connected to the connecting arm 2090. The hydraulic telescopic rod 2087 is communicated with the control panel 204; the automatic collection box cover 2801 realizes automatic opening and closing of the collection box cover through the built-in automatic opening and closing device. When it is observed that the water in the fine particle collection bin is clear, the collection program is started through the control panel 204, the hydraulic telescopic rod 2087 extends, and rotates axially around the connecting rod shaft 2086, and then drives the automatic collection box cover 2801 to open through the hinge 2089; after the collection is completed, the collection box cover is closed to prepare for the subsequent drying and weighing steps.

[0024] One end of the transparent conveying tube 3 is connected to the discharge port 103 , and the other end is connected to the feed port 200 .

[0025] Based on the dynamic coupling of centrifugal force field and high-frequency vibration, this device can basically achieve accurate classification of soil particles and automatic data processing: after the soil sample is mixed by the stirring unit to form a homogeneous suspension, it is pre-filtered through a coarse filter under the action of gravity and then enters the centrifugal screening unit; the screening unit has three levels of high-precision screens built in, and the centrifugal motor drives the screening chamber to rotate at high speed, so that each level of the screen produces a gradient-increasing centrifugal acceleration, realizing step-by-step screening of particles; in this process, the electromagnetic exciter integrated in the bottom of the cavity generates multi-directional mechanical vibration, effectively eliminating the blockage of the mesh of sticky particles; after the screening is completed, the sealing cover of the collection box is opened. Since the bottom of the screening chamber is an inclined plane, the particles can be directed to flow into the collection box, effectively avoiding the radial flow of small particles into large particles; the hot air system is started simultaneously to dry the screened particles in the collection box, and the weighing module in the box simultaneously generates quality data and uploads it; finally, the annular high-pressure spray system and low-speed centrifugal flushing work together to remove residual particles, completing the self-cleaning and reset of the equipment.

[0026] A screening method for a deep-sea sediment centrifugal vibration composite particle multi-stage screening device specifically comprises the following steps: S1: Equipment assembly and pre-inspection: Assemble the equipment according to the requirements and select the appropriate coarse filter 107 specifications; check the docking status of the bottom discharge port 103 of the mixing unit 1 and the feed port of the screening unit to ensure that the sealing gasket is not damaged and confirm that there is no mechanical obstruction in the discharge channel; S2: Add sample: Place the sample to be screened into the mixer cavity 106; connect it to the water supply line through the water inlet 101 on the side wall; S3: Start the mixer: activate the stirring drive motor 100 and run it at a preset speed. At the same time, turn on the switch at the water inlet 101. At the same time, the water level monitoring device 105 on the inner wall of the chamber monitors the water level in real time. If the water level exceeds 80% of the volume, an alarm is triggered and water injection is stopped. The soil sample and water are fully mixed to form a homogeneous suspension. At the same time, the suspension is filtered through the coarse filter 107 at the bottom to ensure uniform mixing. Under the action of gravity, it enters the screening unit 2 through the transparent guide tube; S4: Start the centrifugal screening machine: activate the centrifugal drive motor 211, so that the screening chamber inside the fine particle collection chamber 206 rotates at an appropriate speed, generating a gradient of increasing centrifugal acceleration at the cylindrical screens 207 of different specifications. The screen holes of the cylindrical screens 207 gradually decrease from the inside to the outside, and the sediment particles can undergo three levels of screening in sequence; synchronously start the electromagnetic exciter 213 to form a synergistic screening effect of centrifugal force and mechanical vibration; S5: Collection and weighing of sieved particles: After the sieving is completed, the fine particle outlet pipe 205 is opened to collect the sieved particles with the smallest particle size; then the automatic collection box cover 2801 of the corresponding particle size level is controlled to open, so that the particles in the sieving chamber flow directionally into the sieved particle collection box 208, and the annular spray pipe 218 located on the top of the sieving device is opened simultaneously to form a clean water flow to ensure that the sediment particles are completely collected; after complete collection, the heating coil 2084 located in the interlayer of the collection box is started to heat the air blown in by the air inlet 2802, and finally enters the sieved particle collection box 208 of each stage through the drying air outlet 215, and at the same time, the particle mass change is monitored in real time through the weighing module 214 at the bottom of the box. When the particle mass is stable, the system automatically determines that the drying is completed and closes the ventilation to record the last stable value as the mass of the sediment particles after drying; After weighing, open the collection box outlet 206 on the side of the screening machine, take out the automatic collection box cover 2801, and save it with a number for later use; S6: Self-cleaning of the device: clean water is injected into the annular spray pipe 218, and the centrifugal drive motor 211 is driven at a low speed to form a turbulent water film to flush the cylindrical screen 207 and the inner wall of the fine particle collection bin 206; after cleaning is completed, the side wall air duct 217 is started to blow in dry air to dry the equipment and blow out the residual sediment particles in the screen holes, so that it is convenient for reuse.

[0027] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise expressly defined, the orientations or positional relationships indicated by the terms "upper" and "lower" are based on the orientations or positional relationships shown in the accompanying drawings. They are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connect," "install," and "fix" should be understood in a broad sense. For example, "connection" can mean a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A deep-sea sediment centrifugal vibration composite particle multi-stage screening device, comprising a stirring unit (1), a screening unit (2) and a transparent conveying pipe (3), characterized in that The stirring unit (1) includes a stirring drive motor (100), a stirring machine support (102) and a stirring machine cavity (106), wherein the stirring machine cavity (106) is fixedly mounted on the stirring machine support (102), the stirring drive motor (100) is fixedly mounted on the top of the stirring machine cavity (106), the output shaft of the stirring drive motor (100) is rigidly connected to the stirring paddle (104), a water inlet (101) is provided on the upper side wall of the stirring machine cavity (106), the lower part of the stirring machine cavity (106) is funnel-shaped, a discharge port (103) is provided at the conical end of the bottom of the stirring machine cavity (106) and a coarse filter (107) is built in, and a water level monitoring device (105) is provided on the inner wall of the stirring machine cavity (106); The screening unit (2) comprises a box-shaped shell (202), a feed port (200) is provided on the top of the box-shaped shell (202) and is covered with a sealing cover (201), a fine particle collection bin (206) with an opening on the top is built into the box-shaped shell (202), a side wall air duct (216) is provided between the outer wall of the fine particle collection bin (206) and the inner wall of the box-shaped shell (202), an annular spray pipe (217) is provided on the top wall of the inner cavity of the box-shaped shell (202), a bottom base (209) is fixedly installed on the bottom of the inner cavity of the box-shaped shell (202), a centrifugal drive motor (211) is installed on the bottom base (209), and an output end of the centrifugal drive motor (211) is connected to the inner cavity of the box-shaped shell (202). A collecting box bracket (212) is connected via a coupling (210), an electromagnetic exciter (213) is installed on the side wall of the collecting box bracket (212), a screening particle collecting box (208) is fixedly installed on the collecting box bracket (212), a fine particle outlet pipe (205) extending to the outside of the box-shaped shell (202) is provided at the bottom of the fine particle collecting bin (206); the fine particle collecting bin (206) is internally provided with three levels of replaceable cylindrical screens (207), each level of the cylindrical screens (207) includes a cylindrical filter (2073), a filter bracket (2071) is provided on the outside of the cylindrical filter (2073), and filter brackets (2071) are provided on the top and bottom of the inside of the cylindrical filter (2073). The screen particle collection box (208) is a three-step stepped circular box with a "high middle and low sides". The middle collection box is cylindrical and is the first-step collection box. Its top edge is aligned with the bottom end of the innermost cylindrical screen (207). The second and third-step collection boxes are annular and the height decreases in sequence. The top edges of the second and third-step collection boxes are aligned with the bottom ends of the second and third-step screens, respectively. The whole is arranged in a circular array. The top of each step of the screen particle collection box (208) is equipped with an automatic collection box cover (2801) with an automatic opening and closing device. The side walls of each step of the screen particle collection box (208) are double-layer structures, respectively, the outer wall (28 03) and the inner wall (2805) of the collection box, an air inlet (2802) is provided on the outer wall (2803) of the collection box, a plurality of drying air outlets (215) are provided on the inner wall (2805) of the collection box, a heating coil (2084) is provided between the outer wall (2803) of the collection box and the inner wall (2805) of the collection box, an independent weighing module (214) is provided at the bottom of each step of the collection box of the screening particle collection box (208), a control panel (204) is provided on the outer wall of the box-shaped housing (202), and the control panel (204) is communicatively connected to the centrifugal drive motor (211), the electromagnetic exciter (213), the weighing module (214) and the automatic opening and closing device; One end of the transparent conveying tube (3) is connected to the discharge port (103), and the other end is connected to the feed port (200).

2. A deep-sea sediment centrifugal vibration composite particle multi-stage screening device according to claim 1, characterized in that The inner surface of the mixer cavity (106) is mirror-polished to effectively reduce the adhesion of highly viscous soil samples.

3. The deep-sea sediment centrifugal vibration composite particle multi-stage screening device according to claim 1 is characterized in that The mixer support (102) is provided with a height adjustment bolt, which can lift the mixer to a position higher than the screening unit, and utilize gravity potential energy to realize the gravity transport of the pretreated soil sample to the screening unit.

4. The deep-sea sediment centrifugal vibration composite particle multi-stage screening device according to claim 1 is characterized in that The stirring paddle (104) is a pitch-blade stirring paddle structure, and the paddle plane is inclined to the axis, which can enhance the shearing and crushing effect on the agglomerated soil blocks.

5. The deep-sea sediment centrifugal vibration composite particle multi-stage screening device according to claim 1 is characterized in that The material of the box-shaped shell (202) is stainless steel, and the outer wall of the box-shaped shell (202) is embedded with a double-layer tempered glass observation window (202), which supports real-time monitoring of the screening operation status.

6. The deep-sea sediment centrifugal vibration composite particle multi-stage screening device according to claim 1 is characterized in that The material of the box-shaped shell (202) is stainless steel, and the outer wall of the box-shaped shell (202) is embedded with a double-layer tempered glass observation window (203) to support real-time monitoring of the screening operation status.

7. The deep-sea sediment centrifugal vibration composite particle multi-stage screening device according to claim 1 is characterized in that The automatic opening and closing device includes a connecting rod shaft (2086), a hydraulic telescopic rod (2087), a fixing bolt (2088), a hinge (2089) and a connecting arm (2090). The automatic collection box cover (2801) and the inner wall (2805) of the collection box are relatively rotatably connected via the hinge (2089). The connecting arm (2090) is mounted on the back of the automatic collection box cover (2801) via the fixing bolt (2088). The connecting rod shaft (2086) is fixedly mounted on the inner wall (2805) of the collection box. The bottom end of the hydraulic telescopic rod (2087) is sleeved on the connecting rod shaft (2086). The top end of the hydraulic telescopic rod (2087) is connected to the connecting arm (2090). The hydraulic telescopic rod (2087) is communicatively connected to the control panel (204).

8. A screening method for deep-sea sediment centrifugal vibration composite particle multi-stage screening device as described in claims 1-7, characterized in that , specifically including the following steps: S1: Equipment assembly and pre-inspection: Assemble the equipment according to the requirements and select the appropriate coarse filter (107) specifications; S2: Adding sample: placing the sample to be screened into the mixer cavity (106); connecting the water supply line through the water inlet (101) on the side wall; S3: Start the mixer: activate the stirring drive motor (100) and run it at a preset speed, and at the same time turn on the switch at the water inlet (101). At the same time, the water level monitoring device (105) on the inner wall of the chamber monitors the water level in real time. If the water level exceeds 80% of the volume, an alarm is triggered and water injection is stopped. The soil sample and water are fully mixed to form a homogeneous suspension. At the same time, the suspension is filtered through the bottom coarse filter (107) to make it uniformly stirred, and enters the screening unit (2) through the transparent guide tube under the action of gravity; S4: Start the centrifugal screening machine: activate the centrifugal drive motor (211), rotate the screening chamber inside the fine particle collection chamber (206), generate a gradient-increasing centrifugal acceleration at the cylindrical screens (207) of different specifications, and the screen holes of the cylindrical screens (207) gradually decrease from the inside to the outside, so that the sediment particles can undergo three levels of screening in sequence; synchronously start the electromagnetic exciter (213) to form a synergistic screening effect of centrifugal force and mechanical vibration; S5: Screening particle collection and weighing: After the screening is completed, the fine particle outlet pipe (205) is opened to collect the screened particles with the smallest particle size; then the automatic collection box cover (2801) of the corresponding particle size level is controlled to open, so that the particles in the screening chamber flow directionally into the screening particle collection box (208), and the annular spray pipe (218) located on the top of the screening device is opened simultaneously; after the collection is complete, the heating coil (2084) located in the interlayer of the collection box is started to heat the air blown in from the air inlet (2802), and finally enters the screening particle collection box (208) of each stage through the drying air outlet (215), and at the same time, the particle mass change is monitored in real time through the weighing module (214) at the bottom of the box. When the particle mass is stable, the system automatically determines that the drying is completed and closes the ventilation to record the last stable value as the mass of the sediment particles after drying; After weighing, open the collection box outlet (206) on the side of the screening machine, take out the automatic collection box cover (2801), and save it by number for subsequent use; S6: Self-cleaning of the device: clean water is injected into the annular spray pipe (218), and at the same time, the centrifugal drive motor (211) is driven to form a turbulent water film to flush the cylindrical screen (207) and the inner wall of the fine particle collection chamber (206); after the cleaning is completed, the side wall air duct (217) is started to blow in dry air.

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