A magnetic fluid-based foreign matter cleaning device and application

Abstract

The application discloses a foreign matter cleaning device based on magnetic fluid and application, and belongs to the cleaning device. The foreign matter cleaning device comprises a perfusion device and a magnetic generating device. The perfusion device comprises a control handle and an insertion part, which are internally provided with an instrument canal and a perfusion canal for the passage of magnetic fluid liquid or instruments. The magnetic generating device comprises two groups of X-axis driving guide assemblies, Y-axis driving guide assemblies and Z-axis driving guide assemblies arranged in parallel, and a magnetic element. The magnetic generating device can drive the magnetic element to move in space. The magnetic fluid liquid is injected into the foreign matter area through the perfusion canal, mixed with foreign matter fragments or fibers under the action of the magnetic induction lines of the magnetic element, and discharged. The application adopts the magnetic field to control the movement of the magnetic fluid liquid along the foreign matter area, so that the fragments or fibers after the wrapping of the foreign matter are discharged in a stable flow mode, the damage of pipelines or devices possibly existing in the foreign matter cleaning process is reduced, and the safety and operation precision of the foreign matter cleaning are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of cleaning devices, in particular to a foreign matter cleaning device based on magnetic fluid and application. BACKGROUND

[0002] Pipelines are often used in many industries. Such pipes are generally used as channels for transporting media. During long-term use, foreign matter may block the pipeline or reduce the flow area of the pipeline. Therefore, the pipeline needs to be cleaned in time. To solve the problem of long pipeline, many turning parts and variable diameter pipeline in the pipeline cleaning process, Chinese patent CN215543547U discloses a connecting piece for a pipeline cleaning device, which comprises a brush roller and a central shaft, the brush roller is wrapped around the outer wall of the central shaft, the two central shafts are connected by an elastic connecting piece, the elastic connecting piece is cylindrical, the elastic connecting piece is made of elastic rubber material, and the outer wall of the elastic connecting piece is provided with a scraper made of rubber. The connecting piece for the pipeline cleaning device removes the turning connecting piece composed of complex components such as turning connecting part, turning head, turning connecting hole, connecting pipe body, and connecting turning part in the original equipment. The elastic connecting piece with elastic effect is used to realize turning while effectively reducing the cost of materials. The elastic connecting piece has simple manufacturing process and can be formed with the scraper at one time, without the need for additional installation of the scraper, thereby improving production efficiency. The technical scheme can meet the cleaning of foreign matter blocking the inside of the general pipeline, but it is difficult to clean some small or micro pipes or pipes with special structures, and it is difficult to clean some stubborn foreign matter. In addition, the cleaning device also has the problem of low cleaning efficiency.

[0003] To meet the needs of small or micro pipeline cleaning and improve the cleaning efficiency, compared with macro pipeline cleaning device, micro pipeline cleaning device has more advantages in dealing with small pipeline cleaning. Chinese patent CN111306402A discloses a variable-diameter telescopic micro pipeline cleaning device, which comprises a shell, a walking mechanism, a first driving unit, a variable-diameter cleaning assembly, a second driving unit and a control system. The first driving unit is arranged inside the shell through the bottom frame. The walking mechanism comprises a front wheel and two rear wheels, and the first driving unit drives the two rear wheels to rotate. The variable-diameter cleaning assembly is located at the front end of the shell and is connected with the output end of the second driving unit through a speed reduction mechanism. The variable-diameter cleaning assembly comprises an inner cleaning disc, an intermediate cleaning disc and an outer cleaning disc, which are sequentially sleeved from inside to outside. A group of fixed cleaning heads are arranged at the front end of the inner cleaning disc, and a group of movable cleaning heads are arranged at the front end of the intermediate cleaning disc and the outer cleaning disc. The technical scheme can quickly reach the position of foreign matter in a micro straight pipe or elbow pipe. The variable-diameter cleaning assembly can be telescopic to crush the foreign matter layer by layer from inside to outside for blocked pipeline or foreign matter with thick wall, so that the cleaning is complete and the cleaning efficiency is high.

[0004] The above two existing devices can ensure that the inner wall of the pipeline is cleaned without dead angle, and can clean the foreign matters in the pipelines of different sizes, but there are still defects in pipeline cleaning and maintenance, and the existing pipeline cleaning devices cannot move flexibly in complex pipelines. The existing pipeline cleaning devices mainly clean the foreign matters with thin thickness on the pipe wall. When the pipeline is blocked or the pipe wall has foreign matters with thick thickness, the small pipeline device has the defects of cleaning difficulty, low efficiency, inability to crush the foreign matters and incomplete cleaning.

[0005] It is not limited to pipeline cleaning. For example, in the process of producing solar cells, laser is used to punch or scribe the surface of the cell to punch through part of the insulating layer, the active layer or the conductive layer, and expose the substrate of the cell, so that the back electric field contacts the substrate through the holes or grooves on the film. A large amount of dust particles are generated during the hole processing or scribing process, and part of the dust particles will remain in the hole, which will cause poor lapping between electrodes, cause the cell to short circuit, and thus reduce the conversion efficiency of the cell. At present, water washing or blowing is usually used to remove the dust particles in the hole, but water washing cannot be used for water vapor sensitive cells, which has limitations and low efficiency. In addition, the cleaning of foreign matters in some semi-closed cavities has many different use scenarios, and the development of different cleaning devices for different use scenarios not only has high cost, but also has low practicality in some cases. SUMMARY

[0006] The technical problem to be solved is to provide a foreign matter cleaning device based on magnetic fluid and application, improve the cleaning efficiency and safety of foreign matters, meet the cleaning of foreign matters in pipelines or cavities of various sizes, and be limited by the size or shape of the pipeline or cavity.

[0007] Technical scheme: The foreign matter cleaning device based on magnetic fluid comprises:

[0008] a workbench;

[0009] a magnetic member which selectively generates a magnetic field with different magnetic field lines when energized;

[0010] a perfusion device comprising a control handle and an insertion part fixedly connected with the control handle, the control handle and the insertion part are provided with an instrument lumen and a perfusion lumen for the magnetic fluid or instrument to pass through;

[0011] The magnetic generating device comprises two groups of parallel X-axis driving guide assemblies arranged above a workbench, and a Y-axis driving guide assembly drivingly connected between the two groups of X-axis driving guide assemblies, a Z-axis driving guide assembly drivingly connected to the Y-axis driving guide assembly, and a magnetic piece drivingly connected to the Z-axis driving guide assembly.

[0012] The magnetic piece moves in space above the workbench along with the X-axis driving guide assembly, the Y-axis driving guide assembly and the Z-axis driving guide assembly, the magnetic fluid is injected into the foreign matter area through the perfusion cavity, and is mixed with the foreign matter particles or fibers under the action of the magnetic field lines emitted by the magnetic piece and is discharged.

[0013] Preferably, the X-axis driving guide assembly, the Y-axis driving guide assembly and the Z-axis driving guide assembly each comprise a support base plate and support end plates fixedly arranged at both ends of the support base plate, a ball screw rotatably arranged between the two groups of support end plates, one end of the ball screw drivingly connected to a driving motor, and a ball sleeve drivingly sleeved on the ball screw and an installation seat fixedly connected to the ball sleeve.

[0014] Preferably, a guide rail is arranged on the support base plate, and a guide block is arranged at the lower end of the ball sleeve corresponding to the guide rail.

[0015] Preferably, the driving motor is a servo motor or a stepping motor.

[0016] Preferably, the magnetic piece adopts a plurality of coil modules with specific opposite winding modes, and energizing a plurality of coil modules with the same winding mode can obtain a magnetic field with different magnetic field line directions.

[0017] The application further discloses an application of the foreign matter cleaning device in foreign matter cleaning, comprising the following steps.

[0018] Step 1: preparing a magnetic fluid liquid with good magnetism;

[0019] Step 2: gradually inserting the insertion part into the foreign matter area by operating the control handle; inserting the laser fiber or the cleaning and smashing device into the foreign matter area along the instrument cavity to perform a smashing operation on the foreign matter;

[0020] Step 3: after the foreign matter smashing operation is completed, the perfusion cavity of the control handle and the insertion part is connected to the magnetic fluid liquid storage tank through the conveying pipeline;

[0021] Step 4: starting the magnetic generating device, adjusting the X-axis driving guide assembly, the Y-axis driving guide assembly and the Z-axis driving guide assembly, and driving the magnetic piece to move to a suitable working position;

[0022] Step 5: A number of coil modules with the same winding method in the magnetic element are powered to generate a positive magnetic field, and the X-axis driving guide assembly, the Y-axis driving guide assembly and the Z-axis driving guide assembly are controlled in real time to make micro-distance adjustment to drive the magnetic element to follow to drive the magnetic fluid liquid to travel along the entering path, the tangent direction of the magnetic induction line of the magnetic element is controlled to be consistent with the entering path of the magnetic fluid liquid, and the magnetic fluid liquid is driven to contact and mix with the broken foreign matter in the foreign matter area;

[0023] Step 6: Another group of coil modules with the same winding method in the magnetic element are powered to generate a magnetic field opposite to that in step 5, and the X-axis driving guide assembly, the Y-axis driving guide assembly and the Z-axis driving guide assembly are controlled in real time to make micro-distance adjustment to drive the magnetic element to follow to drive the magnetic fluid liquid to travel along the discharging path, the tangent direction of the magnetic induction line of the magnetic element is controlled to be consistent with the discharging path of the magnetic fluid liquid, and the magnetic fluid liquid with the broken foreign matter is driven to discharge along the specific channel, that is, the foreign matter cleaning work is completed.

[0024] Preferably, the preparation method of the magnetic fluid liquid in step 1 comprises the following steps:

[0025] Step 11: A certain amount of magnetic nanoparticles Fe3O4 is added into polyethylene glycol, and Fe3O4 slurry is prepared under the condition that the stirring speed is 500-700 r / min and the temperature is 50-60℃. 3+ The concentration of the mixed solution is 0.03-0.05 mol / L.

[0026] Step 12: Citric acid with a concentration of 0.02 mol / L is added to the mixed solution prepared in step 11 in a volume ratio of (0.2-0.4):1, and tetraethyl orthosilicate is added dropwise to the mixed solution in a volume ratio of (0.6-0.8):1 under the condition that the temperature is 90-100℃, the Ph is 5.5-6.5, and the stirring speed is 400-600 r / min, and the stirring time is 4-6 h, and then Fe3O4 slurry coated with amorphous SiO2 on the surface is prepared through separation and washing.

[0027] Step 13: Diethylene glycol monomethyl ether with a concentration of 0.05 g / ml is added to the Fe3O4 slurry prepared in step 12 in a volume ratio of (0.2-0.25):1, and the stirring speed is 400-600 r / min under the condition that the temperature is 90-100℃, and the stirring time is 0.5-1.5 h; then acetone is added to the solution, and the magnetic fluid thick slurry is prepared through the steps of magnetic separation, washing and concentration.

[0028] Step 14: Deionized water is added to the magnetic fluid thick slurry in a volume ratio of 0.25:1, and the stirring speed is 600-800 r / min to disperse the magnetic fluid.

[0029] Preferably, the step 13 is separated by magnetic attraction, then washed 3-5 times by acetone, and concentrated under vacuum at 45-65℃ for 2-4h.

[0030] Compared with the prior art, the application has at least the following beneficial effects:

[0031] 1. The foreign matter cleaning device of the application uses magnetic fluid liquid to replace the conventional cleaning device which needs to be inserted into the pipeline or cavity, thereby reducing the structural or size limitation of the pipeline or cavity, and meeting the foreign matter cleaning of large-size pipeline or cavity, and being suitable for the foreign matter cleaning of micro-pipeline or cavity. The magnetic fluid liquid is harmless, has fluidity and magnetism, and can be controlled in flow direction by external magnetic induction lines generated by the magnetic generating device, so that the driving direction of the magnetic fluid liquid is adjusted, the cleaning process is gentle, and the foreign matter cleaning operation in some valuable and fragile pipeline or device can be met.

[0032] 2. In the application of the device in foreign matter cleaning, the magnetic field is used to control the movement of the magnetic fluid liquid along the foreign matter area to wrap the foreign matter and pass the broken powder or fiber to be discharged from the pipeline in a stable flow mode, so that the problem of foreign matter residue caused by dead angle in the cleaning process of the conventional cleaning device is solved, and the foreign matter cleaning efficiency and operation safety are improved.

[0033] 3. The magnetic generating device cooperates with the X-axis driving guide assembly, the Y-axis driving guide assembly and the Z-axis driving guide assembly to meet the spatial multi-dimensional adjustment of the magnetic part, and has the advantages of high adjustment precision and rapid response. In addition, the magnetic part uses two groups of multiple coil modules with different winding modes, the current intensity or the number of coil modules connected to the current can be selected according to the demand condition, the magnetic field strength and the magnetic field range are adjusted and controlled, and the demand of different foreign matter cleaning scenes is met.

[0034] 4. The magnetic fluid liquid prepared by the application has fluidity and magnetism, and the Fe3O4 magnetic nanoparticles have the dual advantages of magnetic particles and nanoparticles. Considering that the Fe3O4 magnetic nanoparticles are easy to oxidize and have high specific surface area and strong aggregation tendency, the Fe3O4 magnetic nanoparticles are coated with amorphous SiO2, and the SiO2 coating layer increases the chemical stability of the Fe3O4 magnetic nanoparticles. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a foreign matter cleaning process schematic diagram of the embodiment of the application.

[0036] Figure 2 It is a foreign matter cleaning device structure schematic diagram of the application.

[0037] Figure 3 It is Figure 2 a perfusion device structure schematic diagram.

[0038] Figure 4 For Figure 3 axial structure section view of the insertion part in the middle;

[0039] Figure 5 For Figure 3 radial structure schematic diagram of the insertion part in the middle;

[0040] Figure 6 For Figure 4 structure schematic diagram of the magnetic generating device in the middle.

[0041] Fig. 1, workbench; 2, magnetic part; 3, perfusion device; 31, control handle; 32, insertion part; 321, instrument cavity; 322, perfusion cavity; 323, sensor cavity; 324, suction cavity; 4, magnetic generating device; 41, X-axis drive guide assembly; 42, Y-axis drive guide assembly; 43, Z-axis drive guide assembly; 44, mounting seat; 45, support base plate; 46, guide slide rail; 47, support end plate; 48, ball screw; 49, ball sleeve; 410, drive motor. DETAILED DESCRIPTION

[0042] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the attached drawings to make a clear and complete description of the technical solutions of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application. Figures 1-6 The technical solutions of the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0043] Embodiment 1:

[0044] As Figure 2 shown in the embodiments, the foreign matter cleaning device based on magnetic fluid of the present application includes a workbench 1, a magnetic part 2, a perfusion device 3 and a magnetic generating device 4. In work, the device to be cleaned is placed on the workbench 1 at a suitable position.

[0045] As Figures 3-5In the shown embodiment, the perfusion device 3 comprises a control handle 31 and an insertion part 32 fixedly connected with the control handle 31, the control handle 31 comprises a handle body and a liquid injection connector in liquid communication with the magnetic fluid, an instrument connector for connecting a cleaning instrument, a suction connector in communication with a vacuum pump, a video signal connector and a sensor connector provided on the handle body. The insertion part 32 is provided with a perfusion cavity 322 in communication with the liquid injection connector, a suction cavity 324 in communication with the suction connector, an instrument cavity 321 in communication with the instrument connector and a sensor cavity 323 for passing a sensor cable along the length direction of the insertion part 32. If a laser is used to break the foreign matter, the laser can be a holmium laser. The holmium laser is a new type of laser generated by a pulsed solid laser device made of a holmium-doped laser crystal (Cr:Tm:Ho:YAG) with yttrium aluminum garnet (YAG) as the active medium, chromium (Cr) as the sensitized ion, thulium (Tm) as the energy transfer ion and holmium (Ho) as the active ion. The holmium laser has high efficiency and safety. The holmium laser fiber is bendable and can enter the foreign matter area through the instrument cavity 321 to effectively break the foreign matter in a complex cavity or channel area. If a steel wire is used as a cleaning and breaking device, it can enter the foreign matter area of the pipeline or cavity along the instrument cavity 321 of the insertion part 32 to clean and break the foreign matter. A video lens can be provided at the front end of the insertion part 32 to observe the image data of the foreign matter area, which facilitates real-time adjustment of the breaking area. When performing cleaning and breaking operations of the broken pieces or fibers, the magnetic fluid liquid can enter the foreign matter area and mix with the broken pieces or fibers through the perfusion cavity 322 provided in the control handle 31 and the insertion part 32. A sensor probe can be correspondingly provided at the front end of the sensor cavity 323. The sensor probe can be a pressure sensor, which is a silicon pressure sensor and can measure the environmental pressure of the foreign matter area in real time to avoid damage to the device pipeline or cavity due to excessive pressure.

[0046] As Figure 2 and Figure 6In the shown embodiment, the magnetic generating device 4 comprises two groups of parallel arranged X-axis driving guide assemblies 41 arranged above the workbench 1, and a Y-axis driving guide assembly 42 drivingly connected between the two groups of X-axis driving guide assemblies 41, and a Z-axis driving guide assembly 43 drivingly connected on the Y-axis driving guide assembly 42. The X-axis driving guide assembly 41, the Y-axis driving guide assembly 42 and the Z-axis driving guide assembly 43 each comprises a support base plate 45 and support end plates 47 fixedly arranged at both ends of the support base plate, and a guide sliding rail 46 arranged along the support base plate 45; a ball screw 48 is rotatably arranged between the two support end plates 47, one end of the ball screw 48 is drivingly connected with a driving motor 410, the driving motor 410 is a servo motor or a stepping motor, the driving motor 410 can drive the ball screw 48 to rotate in opposite directions; a ball sleeve 49 and a mounting seat 44 fixedly connected with the ball sleeve 49 are drivingly sleeved on the ball screw 48, the ball sleeve 49 can be driven to move forward or backward along the ball screw with the rotation of the ball screw 48; a guide block is arranged at the lower end of the ball sleeve 49 corresponding to the guide sliding rail 46, so that the ball sleeve 49 stably moves along the ball screw. The specific connection mode of the X-axis driving guide assembly 41, the Y-axis driving guide assembly 42 and the Z-axis driving guide assembly 43 is that the support base plates at both ends of the Y-axis driving guide assembly 42 are fixedly connected with the mounting seats of the two groups of X-axis driving guide assemblies 41 respectively; the support base plate of the Z-axis driving guide assembly 43 is correspondingly connected with the mounting seat of the Y-axis driving guide assembly 42; the magnetic member 2 is fixedly connected with the mounting seat of the Z-axis driving guide assembly 43. The magnetic member 2 adopts a plurality of coil modules with opposite winding directions, by selectively energizing the coil modules with the same winding mode, a magnetic field with different magnetic induction line directions can be obtained, so that the flow direction of the magnetic fluid liquid can be changed; by selecting the number of coil modules with the same winding mode to be connected, the strength of the generated magnetic field can be adjusted. During work, by controlling the cooperative movement of the X-axis driving guide assembly 41, the Y-axis driving guide assembly 42 and the Z-axis driving guide assembly 43, the magnetic member 2 can be driven to adjust the spatial position above the workbench 1, and by controlling the coil modules of the magnetic member 2 to be connected with current, under the action of the magnetic induction lines emitted by the magnetic member 2, the magnetic fluid is injected into the foreign matter area through the instrument cavity 321, and is mixed with the foreign matter crumbs or fibers, then the flow direction of the magnetic fluid liquid is changed and the crumbs or fibers are wrapped and carried out.

[0047] Embodiment 2:

[0048] As Figure 1 shown, the application also discloses an application of the foreign matter cleaning device in foreign matter cleaning, comprising the following steps:

[0049] Step 1: preparing a magnetic fluid liquid with good magnetism.

[0050] Step 2: The operation control handle 31 gradually inserts the insertion part 32 into the foreign matter area, which can be a blocked area of the pipeline, a scale blocked area of the heat exchanger pipeline, a crystalline blocked area of the micro-pipeline, or a closed cavity with an opening, etc.; the laser fiber or the cleaning and smashing device is inserted into the foreign matter area along the instrument cavity 321 to perform a crushing operation on the foreign matter; wherein the laser source can adopt a holmium laser source, the holmium laser source generates holmium laser by using the existing technology, and the position of the insertion part 32 is adjusted according to the foreign matter area in the field of view by operating the control handle 31, thereby improving the crushing efficiency or crushing quality of the foreign matter area; the cleaning and smashing device can use a steel wire to complete the cleaning and smashing of the foreign matter.

[0051] Step 3: After completing the foreign matter crushing operation, the instrument cavity 321 of the control handle 31 and the insertion part 32 is connected to the magnetic fluid liquid tank through the conveying pipeline; a conveying pump can also be provided on the conveying pipeline, or the negative pressure environment of the foreign matter area is created by suction through the suction cavity 324 in the insertion part 32, so as to meet the magnetic fluid liquid entering the foreign matter area through the perfusion cavity 322. Since the magnetic fluid liquid entering the pipeline or cavity has deformability, it can complete the no-dead-angle filling in the foreign matter area, thereby fully realizing the wrapping of the foreign matter powder or fibers, and being less limited by the shape or size of the pipeline or cavity to be cleaned, and meeting the cleaning needs of pipelines or cavities of various sizes or shapes.

[0052] Step 4: Start the magnetic generating device 4, drive the ball screw to rotate forward or reverse by controlling the corresponding drive motors of the X-axis drive guide assembly 41, the Y-axis drive guide assembly 42 and the Z-axis drive guide assembly 43, and correspondingly drive the ball sleeve and the mounting seat thereon to follow, so as to adjust the position of the Y-axis drive guide assembly 42 on the X-axis drive guide assembly 41, the position of the Z-axis drive guide assembly 43 on the Y-axis drive guide assembly 42, and the position of the magnetic member 2 on the Z-axis drive guide assembly 43, so as to drive the magnetic member 2 to move to a suitable working position relative to the pipeline or device to be cleaned, and meet the subsequent foreign matter cleaning operation.

[0053] Step 5: One or more coil modules with the same winding method in the magnetic member 2 are selected to generate a forward magnetic field, and the X-axis drive guide assembly 41, the Y-axis drive guide assembly 42 and the Z-axis drive guide assembly 43 are controlled in real time to adjust the micro distance to drive the magnetic member 2 to follow, so as to drive the magnetic fluid liquid to travel along the entry path, the tangent direction of the magnetic induction line of the magnetic member 2 is consistent with the entry path of the magnetic fluid liquid, and the magnetic fluid liquid is driven to enter the foreign matter area and mix and wrap the crushed foreign matter; in addition to adjusting the number of connected coil modules, the magnetic field strength of the magnetic member 2 can also be adjusted by adjusting the current intensity, and the advantage of adjusting by multiple coil modules is that the action area can be selected, that is, the size of the magnetic field area, which meets the cleaning needs of pipelines or cavities of different sizes or shapes.

[0054] Step 6: select another group of one or more coil modules with the same winding method in the magnetic element 2 to generate a magnetic field opposite to that in step 5, and control the X-axis drive guide assembly 41, the Y-axis drive guide assembly 42 and the Z-axis drive guide assembly 43 in real time to adjust the micro distance and drive the magnetic element 2 to follow to drive the magnetic fluid liquid to move along the discharge path, control the tangent direction of the magnetic induction line of the magnetic element 2 to be consistent with the discharge path of the magnetic fluid liquid, and drive the magnetic fluid liquid wrapped with the broken foreign matter to discharge along the specific channel, that is, complete the foreign matter cleaning work.

[0055] In the embodiment of the present application, the foreign matter cleaning device uses magnetic fluid liquid to replace the conventional cleaning device which needs to be deeply inserted into the pipeline or cavity, thereby reducing the structural or size limitation of the pipeline or cavity, that is, the foreign matter cleaning of the large-size pipeline or cavity can be met, and the foreign matter cleaning of the micro pipeline or cavity can also be met. The magnetic fluid liquid is harmless, has fluidity and magnetism, and can control the flow direction by the external magnetic induction line generated by the magnetic element, so as to meet the adjustment of the driving direction of the magnetic fluid liquid. The cleaning process is gentle, and can meet the foreign matter cleaning work in some valuable and easily damaged pipelines or devices. Specifically, the magnetic fluid liquid can enter the foreign matter area along the perfusion cavity 322 of the insertion part 32. The magnetic fluid liquid in the insertion part is free to flow, the magnetic induction line of the magnetic element 2 is divergent, but there is an entrance surface direction, that is, the tangent direction of the magnetic induction line. The entrance surface direction of the magnetic element 2 is adjusted by the X-axis drive guide assembly 41, the Y-axis drive guide assembly 42 and the Z-axis drive guide assembly 43, so as to meet the adjustment of the driving direction of the magnetic fluid liquid.

[0056] Embodiment 3:

[0057] In one embodiment of the magnetic fluid liquid in embodiment 2, the specific preparation method comprises the following steps:

[0058] Step 11: weigh the magnetic nanoparticles Fe3O4 and add them into polyethylene glycol, and prepare Fe3O4@SiO2 under the condition that the stirring speed is 500 r / min and the temperature is 60℃. 3+ The concentration of the mixed solution is 0.03 mol / L.

[0059] Step 12: according to the volume ratio of 0.2:1, citric acid with a concentration of 0.02 mol / L is added to the mixed solution prepared in step 11, and tetraethyl orthosilicate is added dropwise to the mixed solution under the condition that the temperature is 90℃, the Ph is 5.5, the stirring speed is 400 r / min and the stirring time is 4h. After separation and washing, Fe3O4 slurry coated with amorphous SiO2 on the surface is prepared.

[0060] Step 13: Diethylene glycol monomethyl ether with a concentration of 0.05 g / ml was added to the Fe3O4 slurry prepared in step 12 at a ratio of 0.2:1 by volume, and stirred at a temperature of 90°C and a stirring speed of 400 r / min for 0.5 h; then acetone was added to the solution, and the solution was separated by magnetic attraction with a magnet, and then washed with acetone 3 times, and concentrated under vacuum at 45°C for 2 h to obtain a concentrated slurry of magnetic fluid;

[0061] Step 14: Deionized water was added to the concentrated slurry of magnetic fluid at a ratio of 0.25:1 by volume, and dispersed at a stirring speed of 600 r / min to obtain a magnetic fluid.

[0062] Example 4:

[0063] In one embodiment of the magnetic fluid liquid in Example 2, the specific preparation method comprises the following steps:

[0064] Step 11: Magnetic nanoparticles Fe3O4 were weighed and added to polyethylene glycol, and a Fe3O4 slurry was prepared at a stirring speed of 700 r / min and a temperature of 55°C. 3+ The mixed solution had a concentration of 0.38 mol / L;

[0065] Step 12: Citric acid with a concentration of 0.02 mol / L was added to the mixed solution prepared in step 11 at a ratio of 0.35:1 by volume, and tetraethyl orthosilicate was added dropwise to the mixed solution at a ratio of 0.7:1 by volume under the following conditions: a temperature of 100°C, a pH of 6.0, and a stirring speed of 500 r / min, and the mixture was stirred for 5 h, and then separated and washed to obtain a Fe3O4 slurry coated with amorphous SiO2 on the surface;

[0066] Step 13: Diethylene glycol monomethyl ether with a concentration of 0.05 g / ml was added to the Fe3O4 slurry prepared in step 12 at a ratio of 0.22:1 by volume, and stirred at a temperature of 95°C and a stirring speed of 500 r / min for 1.0 h; then acetone was added to the solution, and the solution was separated by magnetic attraction with a magnet, and then washed with acetone 4 times, and concentrated under vacuum at 55°C for 3 h to obtain a concentrated slurry of magnetic fluid;

[0067] Step 14: Deionized water was added to the concentrated slurry of magnetic fluid at a ratio of 0.25:1 by volume, and dispersed at a stirring speed of 700 r / min to obtain a magnetic fluid.

[0068] Example 5:

[0069] In one embodiment of the magnetic fluid liquid in Example 2, the specific preparation method comprises the following steps:

[0070] Step 11: The magnetic nanoparticles Fe3O4 are weighed and added to polyethylene glycol, and under the condition of a stirring speed of 600 r / min and a temperature of 55℃, Fe 3+ The mixed solution has a concentration of 0.05 mol / L.

[0071] Step 12: Citric acid with a concentration of 0.02 mol / L is added to the mixed solution prepared in step 11 in a volume ratio of 0.2:1, and under the condition of a temperature of 95℃, a pH of 6.5 and a stirring speed of 600 r / min, tetraethyl orthosilicate is added to the mixed solution in a volume ratio of 0.8:1, and stirring is performed for 6 h, and then Fe3O4 slurry coated with amorphous SiO2 is prepared through separation and washing.

[0072] Step 13: Diethylene glycol monomethyl ether with a concentration of 0.05 g / ml is added to the Fe3O4 slurry prepared in step 12 in a volume ratio of 0.25:1, and stirring is performed for 1.5 h under the condition of a temperature of 100℃ and a stirring speed of 600 r / min; then, acetone is added to the solution, and separation is performed by magnetic attraction, and then the Fe3O4 slurry is washed with acetone for 5 times, and vacuum concentration is performed for 4 h under the condition of a temperature of 65℃, and then magnetic fluid thick slurry is prepared.

[0073] Step 14: Deionized water is added to the magnetic fluid thick slurry in a volume ratio of 0.25:1, and dispersion is performed under the condition of a stirring speed of 800 r / min, and then magnetic fluid is obtained.

[0074] The magnetic fluid liquid prepared by the method has fluidity and magnetism, and Fe3O4 magnetic nanoparticles have the dual advantages of magnetic particles and nanoparticles, and considering that Fe3O4 magnetic nanoparticles are easy to oxidize and have a high specific surface area and a strong aggregation tendency, the Fe3O4 magnetic nanoparticles are coated with amorphous SiO2, and the SiO2 coating layer increases the chemical stability of the Fe3O4 magnetic nanoparticles. In addition, the non-toxicity of SiO2 and the hydroxyl groups on the surface improve the biocompatibility, and the magnetic fluid prepared by the Fe3O4 magnetic nanoparticles and the foreign matter cleaning device arranged in cooperation have the advantages of safety, high efficiency and precise control, and have potential value in the biomedical field, such as application in kidney stone removal.

[0075] The above is a preferred embodiment of the present application, and it should be pointed out that those skilled in the art can make some improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An application of a magnetofluid-based foreign matter removal device in foreign matter removal, characterized in that, Foreign object removal device includes: Workbench (1); Magnetic component (2), which selectively generates magnetic fields with different magnetic field lines directions when energized; The infusion device (3) includes a control handle (31) and an insertion part (32) fixedly connected to the control handle (31). The control handle (31) and the insertion part (32) are provided with an instrument cavity (321) and an infusion cavity (322) for magnetic fluid or instruments to pass through. The magnetic generating device (4) includes two sets of parallel X-axis drive guide assemblies (41) correspondingly arranged above the worktable (1) and a Y-axis drive guide assembly (42) connected between the two sets of X-axis drive guide assemblies (41). A Z-axis drive guide assembly (43) is connected to the Y-axis drive guide assembly (42). The magnetic component (2) is connected to the Z-axis drive guide assembly (43). The magnetic component (2) moves in the space above the worktable (1) along with the X-axis drive guide assembly (41), Y-axis drive guide assembly (42) and Z-axis drive guide assembly (43). The magnetic fluid is injected into the foreign matter area through the injection cavity (322) and mixed with the foreign matter particles or fibers under the action of the magnetic field lines emitted by the magnetic component (2) and discharged. The application includes the following steps: Step 1: Prepare a magnetic fluid with good magnetic properties; Step 2: Operate the control handle (31) to gradually insert the insertion part (32) into the foreign object area; insert the laser fiber or cleaning device along the instrument cavity (321) into the foreign object area to perform the crushing operation on the foreign object; Step 3: After completing the foreign object crushing operation, connect the injection cavity (322) of the control handle (31) and the insertion part (32) to the magnetic fluid liquid storage tank through the delivery pipe; Step 4: Start the magnetic generator (4), and make corresponding adjustments by controlling the X-axis drive guide assembly (41), Y-axis drive guide assembly (42) and Z-axis drive guide assembly (43), and drive the magnetic component (2) to move to the appropriate working position; Step 5: Select several coil modules with the same winding method in the magnetic component (2) and energize them to generate a positive magnetic field. Control the X-axis drive guide assembly (41), Y-axis drive guide assembly (42) and Z-axis drive guide assembly (43) in real time to make micro-adjustments to drive the magnetic component (2) to follow and drive the magnetic fluid liquid to travel along the entry path. Control the tangent direction of the magnetic field line of the magnetic component (2) to be consistent with the entry path of the magnetic fluid liquid, and drive the magnetic fluid liquid to enter the foreign object area to contact and mix with the broken foreign object. Step 6: Select another set of coil modules with the same winding method in the magnetic component (2) and energize them to generate a magnetic field opposite to that in step 5. Control the X-axis drive guide assembly (41), Y-axis drive guide assembly (42) and Z-axis drive guide assembly (43) in real time to make micro-adjustments to drive the magnetic component (2) to follow and drive the magnetic fluid liquid to travel along the discharge path. Control the tangent direction of the magnetic field line of the magnetic component (2) to be consistent with the discharge path of the magnetic fluid liquid, and drive the magnetic fluid liquid carrying broken foreign objects to be discharged along a specific channel, thus completing the foreign object cleaning operation.

2. The application of the magnetofluid-based foreign object cleaning device according to claim 1 in foreign object cleaning, characterized in that, The X-axis drive guide assembly (41), Y-axis drive guide assembly (42) and Z-axis drive guide assembly (43) each include a support base plate (45) and support end plates (47) fixedly disposed at both ends of the support base plate. A ball screw (48) is rotatably disposed between the two sets of support end plates (47). One end of the ball screw (48) is connected to the drive motor (410) for transmission, and a ball sleeve (49) and a mounting seat fixedly connected to the ball sleeve (49) are mounted on the ball screw (48).

3. The application of the magnetofluid-based foreign matter removal device according to claim 2 in foreign matter removal, characterized in that, A guide rail (46) is provided along the support base plate (45), and a guide block is provided at the lower end of the ball sleeve (49) corresponding to the guide rail (46).

4. The application of the magnetofluid-based foreign matter removal device according to claim 2 in foreign matter removal, characterized in that, The drive motor (410) is a servo motor or a stepper motor.

5. The application of the magnetofluid-based foreign matter removal device according to claim 1 in foreign matter removal, characterized in that, The magnetic component (2) uses several coil modules with specific opposite winding methods. By selecting several coil modules with the same winding method and energizing them, magnetic fields with different magnetic field lines can be obtained.

6. The application of the magnetofluid-based foreign object cleaning device according to claim 1 in foreign object cleaning, characterized in that, The preparation method of the magnetofluid liquid in step 1 includes the following steps: Step 11: Weigh magnetic nanoparticles Fe3O4 and add them to polyethylene glycol. Under stirring conditions of 500–700 r / min and a temperature of 50–60 °C, Fe3O4 nanoparticles are obtained. 3+ A mixed solution with a concentration of 0.03~0.05 mol / L; Step 12: Add 0.02 mol / L citric acid to the mixed solution prepared in step 11 at a volume ratio of (0.2~0.4):

1. Under the conditions of temperature of 90~100℃, pH of 5.5~6.5 and stirring speed of 400~600 r / min, add tetraethyl orthosilicate dropwise to the mixed solution at a volume ratio of (0.6~0.8):1 and stir for 4~6 h. After separation and washing, Fe3O4 slurry with amorphous SiO2 coated on the surface is obtained. Step 13: Add 0.05 g / ml diethylene glycol monomethyl ether to the Fe3O4 slurry prepared in step 12 at a volume ratio of (0.2~0.25):1, and stir for 0.5~1.5 h at a temperature of 90~100℃ and a stirring speed of 400~600 r / min; then add acetone to the solution, and obtain a magnetic fluid slurry through magnetic separation, washing and concentration steps. Step 14: Add deionized water to the magnetic fluid slurry at a volume ratio of 0.25:1 and disperse it under a stirring speed of 600~800 r / min to obtain the magnetic fluid.

7. The application of the magnetofluid-based foreign object removal device according to claim 6 in foreign object removal, characterized in that, In step 13, the separation is performed by magnetic attraction, followed by washing with acetone 3 to 5 times, and then vacuum concentration at 45 to 65°C for 2 to 4 hours.

Images