A separation and pretreatment device for radioactive cesium in seawater

Abstract

The application discloses a kind of separation pretreatment device for radioactive cesium in seawater, belong to seawater separation technical field.The seawater separation cylinder is included, the filter cover for filtering impurities is assembled at the top of seawater separation cylinder, the modular enrichment separation mechanism is configured with the inside circle center position of seawater separation cylinder, modular enrichment separation mechanism is assembled by a plurality of pre-assembled annular frame upward stack, and each pre-assembled annular frame is attached with a plurality of enrichment resin frame by magnetic attraction, to constitute the modular separation enrichment column of seawater separation cylinder circle center end, by the combination of modular enrichment separation mechanism and magnetic attraction, the quick, safe replacement of radioactive cesium adsorption separation end is realized, effectively solve the problem that the whole enrichment column is replaced cumbersome in prior art, long downtime, when some resin frame adsorption saturation, can be individually disassembled and replaced, without stopping or disassembling entire column body, significantly reduce the maintenance time and the radioactive exposure risk of operator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seawater separation, and more particularly to a separation pretreatment device for radioactive cesium in seawater. BACKGROUND

[0002] Monitoring of radioactive cesium in the marine environment is one of the key links for assessing the health of the marine ecosystem and implementing environmental protection. In the prior art, for the detection and analysis of radioactive cesium in seawater, a separation and enrichment device is usually used to pretreat seawater samples to concentrate the target nuclide and eliminate matrix interference. The core of such a device is its separation and enrichment unit, which is filled with an adsorbent material with high selectivity for cesium ions. The whole device includes a pumping system, a pretreatment assembly, and a separation and enrichment column. The working process is that seawater is pumped through the enrichment column, and cesium ions are specifically intercepted by the adsorbent in the column, thereby achieving effective separation from large-volume seawater.

[0003] However, in actual application, the adsorption resin in the enrichment column is a consumable product, and its adsorption capacity is limited. The enrichment column in the prior art is usually designed as a whole, and the column body and inlet and outlet pipelines are often rigidly connected through flanges. Some separation ends are even integrated with the bracket. This fixed connection mode makes the operation of replacing the failed adsorbent extremely cumbersome. Not only does it require shutdown and disassembly of associated pipelines, resulting in low efficiency and prolonging the monitoring interruption time, but also when handling the resin that has adsorbed radioactive nuclides, the operator may face the risk of radioactivity and the possibility of cross-contamination.

[0004] In some improved technologies, in order to reduce the number of shutdowns, more durable adsorbents are used, or the column end cap is opened, but these methods cannot fundamentally change the nature of the inconvenient maintenance. For marine monitoring agencies that need long-term and multi-point operation, this problem is particularly prominent. In a complex ship-based platform environment, disassembling a whole column body rigidly connected with pipelines requires high operation space and special tools, and the process is prone to radioactive leakage and cross-contamination. SUMMARY

[0005] In view of the problems in the prior art, the present application aims to provide a separation pretreatment device for radioactive cesium in seawater to solve the above technical problems.

[0006] To solve the above problems, the present application adopts the following technical solution.

[0007] A kind of separation pretreatment device for radioactive cesium in seawater, including seawater separation cylinder, the top of the seawater separation cylinder is equipped with filter cover for filtering impurities, the inside centric position of the seawater separation cylinder is configured with modular enrichment separation mechanism, the modular enrichment separation mechanism is assembled by several pre-assembled annular frames stacked upwards, and several enrichment resin frames are magnetically adsorbed on each pre-assembled annular frame, to form the modular separation enrichment column of the centric end of seawater separation cylinder;

[0008] The outer surface of the seawater separation cylinder is provided with an external magnetic traction mechanism that can move up and down along the cylinder wall and rotate around the cylinder;

[0009] The outer side of the modular enrichment separation mechanism is slidably provided with a self-taking and placing mechanism, the self-taking and placing mechanism is configured with two groups of symmetrically arranged taking and placing modules, and each group of taking and placing modules is provided with a first servo telescopic rod for telescopic taking and replacing enrichment resin frame;

[0010] The external magnetic traction mechanism and the self-taking and placing mechanism are magnetically attracted to each other, so that the self-taking and placing mechanism moves around the modular enrichment separation mechanism through the seawater separation cylinder, and the first servo telescopic rod of one side taking and placing module takes the failed enrichment resin frame, and the other side simultaneously inserts a new enrichment resin frame to complete the self-maintenance work of the separation end.

[0011] As a further scheme of the application: the modular enrichment separation mechanism includes a circular ring base fixedly connected to the centric position of the inner bottom of the seawater separation cylinder, the upper surface of the circular ring base is fixedly connected with a first plug-in annular sleeve, the two side ends of the pre-assembled annular frame are also fixedly connected with a second plug-in annular sleeve, and the second plug-in annular sleeve is sequentially assembled upwards by plug-in cooperation with the first plug-in annular sleeve, and a plurality of fan-shaped notches are circumferentially formed on the side edge of each pre-assembled annular frame, the first magnetic attraction plate is fixedly installed on the side edge of the fan-shaped notch, the enrichment resin frame is also fan-shaped, and the outer surface is sleeved with a fan-shaped embedded frame, the second magnetic attraction plate is fixedly installed on the side edge of the fan-shaped embedded frame, and is inserted and assembled in the fan-shaped notch by adsorbing and fitting with the first magnetic attraction plate.

[0012] As a further scheme of the present application: the self-taking and placing mechanism comprises a second circular sleeve, the second circular sleeve is integrally sleeved on the outside of the circular cylinder composed of a plurality of pre-assembled circular frames, a magnetic circular edge is fixedly connected to the outer edge of the second circular sleeve and tightly sealed against the inner wall of the seawater separation cylinder, the bottom surface of the second circular sleeve is provided with symmetric taking and placing modules, and each taking and placing module is provided with a sealing module on the side facing the pre-assembled circular frame, the taking and placing module comprises a T-shaped arc-shaped cavity, and the side of the T-shaped arc-shaped cavity facing the pre-assembled circular frame is open, a first servo telescopic rod is fixedly installed in the T-shaped arc-shaped cavity, and the output end of the first servo telescopic rod is telescopic towards the side of the pre-assembled circular frame.

[0013] As a further scheme of the present application: the outer magnetic traction mechanism comprises a first servo motor connected to the bottom of the outer surface of the seawater separation cylinder, a threaded rod flush with the seawater separation cylinder is fixedly installed on the output end of the first servo motor, a first circular sleeve engaging with the threaded rod is sleeved on the outer surface of the seawater separation cylinder, a circular gear sleeve with the same center is movably installed on the first circular sleeve, a tooth opening is formed on the outer circular edge of the circular gear sleeve, an electrically controlled magnetic circular sleeve is fixedly installed on the upper surface of the circular gear sleeve, and the magnetic end of the electrically controlled magnetic circular sleeve is attracted to the corresponding magnetic circular edge through the seawater separation cylinder, a second servo motor is fixedly installed on the side of the first circular sleeve, and a toothed disc engaging with the outer circular tooth opening of the circular gear sleeve is fixedly installed on the output end of the second servo motor.

[0014] As a further scheme of the present application: the bottom of the seawater separation cylinder is fixedly connected with a base support cover, a drain pipe is fixedly installed on the side wall of the base support cover, the drain pipe is connected to the bottom center position of the seawater separation cylinder and communicates with the inside of the circular base to drain away the seawater after adsorption and separation, a detection unit is fixedly installed on the upper surface of the electrically controlled magnetic circular sleeve, the detection end of the detection unit tightly abuts against the outer surface of the seawater separation cylinder, and the outer surface of the seawater separation cylinder is transparent, and a vortex adsorption mechanism capable of generating vortex at the center end of the seawater separation cylinder is further arranged in the inside of the circular base to drive the seawater to the one end of the modular enrichment separation mechanism for separation and adsorption.

[0015] As a further scheme of the present application: the turbine adsorption mechanism comprises a third servo motor fixedly installed at the inner center position of the circular base, a cavity rod is fixedly installed on the output end of the third servo motor, a plurality of turbine blades are sequentially fixedly connected on the outer surface of the cavity rod from top to bottom, a second servo telescopic rod is fixedly installed in the cavity rod, the extending end of the second servo telescopic rod faces the top of the cavity rod and extends out of the top of the cavity rod, a magnetic suction disc is fixedly installed on the extending end, an electric control magnetic suction sleeve is movably installed on the magnetic suction disc, the magnetic suction end of the electric control magnetic suction sleeve is attached to the upper surface of the magnetic suction disc, and a flow port is formed around the position outside the third servo motor at the bottom of the circular base.

[0016] As a further scheme of the present application: the electric control magnetic suction sleeve is externally provided with an activation mechanism, the activation mechanism comprises a bent cavity rod, a cavity rotating drum is movably installed on the extending end of the bent cavity rod, the cavity rotating drum is flush with a circular cylinder composed of a plurality of pre-assembled circular ring frames, the inside of the cavity rotating drum is hollow, an injection sleeve is fixedly installed in the cavity, a shunt cylinder is fixedly connected on the output end of the injection sleeve, a plurality of drainage hoses are connected in parallel to the shunt cylinder, each drainage hose is attached to the inner wall of the cavity rotating drum and extends out of the top of the side wall of the cavity rotating drum, and a scraping sleeve is sleeved on the outer surface of the cavity rotating drum and connected with the drainage hoses extending out of the side wall of the cavity rotating drum.

[0017] As a further scheme of the present application: the activation mechanism further comprises an injection push rod inserted into the injection sleeve, an outer convex disc is fixedly installed on the outer extending end of the injection push rod, a reset spring is fixedly installed on the outer convex disc and clamped in the cavity of the cavity rotating drum, the reset spring always pulls the injection push rod to extend outward, the extending end of the injection push rod penetrates through the bottom of the cavity rotating drum, a trigger outer extending rod is fixedly installed on the penetrating end, a ball sleeve is fixedly installed on the trigger outer extending rod, a wave-shaped circular base is fixedly installed on the upper surface of the second circular sleeve, the balls of the ball sleeve are always attached to the upper surface of the wave-shaped circular base under the outward pulling action of the reset spring, a liquid supplementing adsorption hose is further fixedly installed in the bent cavity rod, one side of the liquid supplementing adsorption hose is connected to the injection sleeve, and the other side penetrates through the bent cavity rod.

[0018] As a further scheme of the present application: the taking and placing module further comprises a circular arc hollow frame fixedly installed on the output end of the first servo telescopic rod, a magnetic suction coating is arranged on the side wall of the circular arc hollow frame, a pressure detection rod is fixedly installed on the side wall of both sides of the T-shaped arc-shaped cavity, an everted bottom plate is hingedly installed on the bottom of the T-shaped arc-shaped cavity, and a dismounting plate is also arranged at the bottom of the seawater separation cylinder to open the everted bottom plate for eversion.

[0019] As a further scheme of the present application: the sealing module comprises an arc-shaped frame, the two sides of the frame are fixedly connected with limiting side frames, a spring winding drum is fixedly installed on one side of the arc-shaped frame, and an electric control winding drum is fixedly installed on the other side, two traction ropes are wound on the electric control winding drum and accommodated in the limiting side frame, a clamping plate is fixedly connected to the outside of the traction rope, the clamping plate is slidably clamped in the limiting side frame, and a sealing cloth cover is wound on the spring winding drum.

[0020] The above technical scheme provided by the present application has at least the following beneficial effects compared with the prior art:

[0021] The present application combines modular enrichment separation mechanism with magnetic adsorption to realize rapid and safe replacement of the cesium adsorption and separation end, effectively solving the problem of complicated replacement and long downtime of the whole enrichment column in the prior art. The pre-assembled ring frame is stacked upward, each frame is fixed with a fan-shaped enrichment resin frame by magnetic attraction, and an expandable separation enrichment column is formed. When a certain resin frame is saturated, it can be replaced individually without stopping or disassembling the entire column, significantly reducing maintenance time and the risk of radioactive exposure for operators. Compared with the traditional rigid connection mode, this design allows local maintenance without stopping, which is particularly suitable for long-term ocean monitoring scenarios, improving the continuity and adaptability of the device.

[0022] Through the non-contact driving cooperation of the external magnetic attraction type traction mechanism and the self-taking and placing mechanism, the automatic taking and placing of the enrichment resin frame are realized, the operation safety and precision are improved, the external magnetic attraction type traction mechanism controls the movement of the self-taking and placing mechanism through the seawater separation cylinder wall, so that it rotates around the enrichment column and moves up and down, and the servo telescopic rod of the taking and placing module synchronously completes the taking of the failed frame and the insertion of the new frame. The magnetic attraction coupling mode avoids damage to the cylinder seal, prevents radioactive leakage and cross contamination, and the detection unit monitors the adsorption state in real time to ensure that the operation is in place. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the present application and, together with the specification, further serve to explain the principles of the present application and enable a person skilled in the relevant art to implement and use the present application.

[0024] Figure 1 The present application is a schematic diagram of the overall structure;

[0025] Figure 2 The present application is a schematic diagram of the structure of the seawater separation cylinder in a semi-section state;

[0026] Figure 3 The present application is a schematic diagram of the overall structure of the turbine adsorption mechanism;

[0027] Figure 4 Structure diagram of the modular enrichment separation mechanism in a split state of the application;

[0028] Figure 5 Structure diagram of the turbine adsorption mechanism in a split state of the application;

[0029] Figure 6 Structure diagram of the external magnetic attraction type traction mechanism and self-taking and placing mechanism of the application;

[0030] Figure 7 Structure diagram of the T-shaped arc-shaped cavity in a half-section state of the application;

[0031] Figure 8 Structure diagram of the sealing module of the application;

[0032] Figure 9 Structure diagram of the activation mechanism in a split state of the application.

[0033] Reference signs

[0034] 1, seawater separation cylinder; 2, filter cover; 3, base support cover;

[0035] 4, external magnetic attraction type traction mechanism; 41, first servo motor; 42, threaded rod; 43, first circular ring sleeve; 44, circular ring gear sleeve; 45, second servo motor; 46, electric control magnetic attraction type circular ring sleeve; 47, detection unit;

[0036] 5, modular enrichment separation mechanism; 51, circular ring base; 52, first plug-in circular ring sleeve; 53, pre-assembled circular ring frame; 54, fan-shaped notch; 55, first magnetic attraction plate; 56, fan-shaped embedded frame; 57, enrichment resin frame; 58, second magnetic attraction plate; 59, second plug-in circular ring sleeve;

[0037] 6, self-taking and placing mechanism; 61, second circular ring sleeve; 62, magnetic attraction circular ring edge;

[0038] 63, taking and placing module; 631, T-shaped arc-shaped cavity; 632, first servo telescopic rod; 633, circular arc hollow frame; 634, magnetic attraction coating; 635, pressure detection rod; 636, everted bottom plate;

[0039] 64, sealing module; 641, arc-shaped edge frame; 642, limiting side frame; 643, spring winding drum; 644, electric control winding drum; 645, traction pull rope; 646, clamping plate; 647, sealing cloth cover;

[0040] 7, turbine adsorption mechanism; 71, third servo motor; 72, cavity rod; 73, turbine blade; 74, second servo telescopic rod; 75, magnetic attraction disc; 76, electric control magnetic attraction sleeve; 77, water inlet;

[0041] 8, activation mechanism; 81, bending cavity rod; 82, cavity drum; 83, injection sleeve; 84, shunt cylinder; 85, drainage hose; 86, scraping sleeve; 87, injection push rod; 88, outer convex disc; 89, reset spring; 810, trigger extension rod; 811, ball sleeve; 812, liquid supplementing adsorption hose; 813, wave-shaped circular ring base;

[0042] 9, drain pipe.

[0043] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application to the specific structures, devices and environments, and those skilled in the art can adjust or modify these devices and environments according to specific needs. DETAILED DESCRIPTION

[0044] A device for separating and pretreating radioactive cesium in seawater is described in detail below in combination with the drawings and specific embodiments. It should be noted that the following embodiments are the best, preferred embodiments, and other alternative embodiments can also be implemented by those skilled in the art for some known technologies; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0045] As shown in the drawings, Figures 1 to 9 The device for separating and pretreating radioactive cesium in seawater provided by the embodiments of the present application comprises a seawater separation cylinder 1, a filter cover 2 for filtering impurities is assembled at the top of the seawater separation cylinder 1, a modular enrichment separation mechanism 5 is arranged at the inner circumcenter position of the seawater separation cylinder 1, the modular enrichment separation mechanism 5 is assembled by stacking a plurality of pre-assembled circular ring frames 53 upwards, and a plurality of enrichment resin frames 57 are magnetically adsorbed on each pre-assembled circular ring frame 53 to form a modular separation enrichment column at the circumcenter end of the seawater separation cylinder 1.

[0046] An external magnetic attraction traction mechanism 4 is arranged on the outer surface of the seawater separation cylinder 1, which can move up and down along the cylinder wall and rotate around the cylinder.

[0047] A self-taking and placing mechanism 6 is slidably arranged on the outside of the modular enrichment separation mechanism 5, two groups of symmetrically arranged taking and placing modules 63 are arranged on the self-taking and placing mechanism 6, and a first servo telescopic rod 632 for telescopic taking and replacing the enrichment resin frame 57 is arranged in each group of taking and placing modules 63.

[0048] The outer magnetic attraction type traction mechanism 4 is magnetically attracted to the self-taking and placing mechanism 6, so as to control the self-taking and placing mechanism 6 to move around the modular enrichment separation mechanism 5 through the seawater separation cylinder 1, and take the invalid enrichment resin frame 57 through the first servo telescopic rod 632 of one side taking and placing module 63, and synchronously insert a new enrichment resin frame 57 on the other side to complete the self-maintenance work of the separation end.

[0049] In order to solve the problem that the existing radioactive cesium monitoring device is difficult to replace the adsorption separation end and has safety risks due to the overall design of the separation and enrichment unit, the above technical scheme is adopted to solve the problem. The above technical scheme mainly comprises a seawater separation cylinder 1, a filter cover 2, an outer magnetic attraction type traction mechanism 4, a modular enrichment separation mechanism 5, and a self-taking and placing mechanism 6. Through the modular design of the adsorption end and magnetic attraction driving, the adsorption separation end is quickly and safely replaced, and the separation continuity and efficiency are improved.

[0050] The configured seawater separation cylinder 1 is used as the main container of the device, adopts a cylindrical barrel structure, the barrel wall is a visible transparent material of high-strength glass, which is convenient for observing the internal working state and facilitating detection, a filter cover 2 is assembled on the top of the seawater separation cylinder 1 through a buckle mode, a plurality of filter screens are arranged in the filter cover 2, which are used to remove large-particle impurities and flocculation when seawater flows in, and prevent the subsequent enrichment unit from being blocked. The bottom of the seawater separation cylinder 1 is fixedly connected with a base support cover 3, which provides stable support and is provided with a drain pipe 9 for discharging treated seawater, which all belong to the conventional structure in the prior art and mainly play a basic containing and pretreatment role, which ensures the smoothness of seawater flow and the stability of the separation environment. The modular enrichment and separation mechanism 5 is the core of the adsorption and separation end, which is fixedly installed at the center position in the seawater separation cylinder 1, including a circular ring base 51, a first plug-in circular ring sleeve 52 is fixedly connected to the upper surface of the circular ring base 51, a pre-assembled circular ring frame 53 is inserted and matched with the first plug-in circular ring sleeve 52 through the second plug-in circular ring sleeve 59 on the two sides, and is sequentially stacked and assembled upwards, forming an expandable columnar structure. A plurality of sector notches 54 are circumferentially arranged on the circular ring edge of each pre-assembled circular ring frame 53, a first magnetic plate 55 is fixedly installed on each side of each sector notch 54, and an enrichment resin frame 57 is configured in a sector shape and is sleeved with a sector embedded frame 56 on the outer surface, and the side edges of the sector embedded frame 56 are fixedly installed with second magnetic plates 58. The enrichment resin frame 57 can be fixedly inserted into the sector notch 54 through the magnetic attraction between the second magnetic plate 58 and the first magnetic plate 55. The structure of the enrichment resin frame 57 and the sector embedded frame 56 can become an independent detachable module, when a certain resin frame is saturated, it can be replaced individually without disassembling the entire enrichment column, and the enrichment resin frame 57 in the sector embedded frame 56 can also be individually disassembled for cleaning and maintenance or recharging with adsorption resin particles, which reduces the maintenance time and radioactive exposure risk of the adsorption and separation end, and the height of the enrichment column can be flexibly adjusted according to the seawater treatment capacity, thereby enhancing the adaptability of the device. The external magnetic type traction mechanism 4 is arranged on the outer surface of the seawater separation cylinder 1 and is used to drive the self-taking and placing mechanism 6 in the working process. The external magnetic type traction mechanism 4 can move up and down on the outer surface of the seawater separation cylinder 1 and rotate around the cylinder in the working process. The self-taking and placing mechanism 6 is slidably sleeved on the outside of the modular enrichment and separation mechanism 5 and is tightly sealed with the inner wall of the seawater separation cylinder 1. When the external magnetic type traction mechanism 4 drives the self-taking and placing mechanism 6 to move to the target position, the first servo telescopic rod 632 of the one-side taking and placing module 63 is extended, the invalid enrichment resin frame 57 is taken through the end of the first servo telescopic rod 632, and then the new enrichment resin frame 57 is inserted through the first servo telescopic rod 632 of the other-side taking and placing module 63, so as to realize the synchronous replacement of one taking and one placing.

[0051] As Figure 1 , Figure 2 , Figure 3 , Figure 4 ,Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 As shown in FIG. 1, the modular enrichment separation mechanism 5 comprises a circular ring base 51 fixedly connected to the inner bottom center of the seawater separation cylinder 1, the upper surface of the circular ring base 51 is fixedly connected with a first plug-in circular ring sleeve 52, the two side ends of a pre-assembled circular ring frame 53 are also fixedly connected with a second plug-in circular ring sleeve 59, and the pre-assembled circular ring frame 53 is sequentially upwardly assembled through the plug-in cooperation of the second plug-in circular ring sleeve 59 and the first plug-in circular ring sleeve 52, and a plurality of sector-shaped notches 54 are circumferentially formed on the side edges of each pre-assembled circular ring frame 53, a first magnetic attraction plate 55 is fixedly installed on the side edge of each sector-shaped notch 54, the enrichment resin frame 57 is also sector-shaped, and a sector-shaped embedded frame 56 is sleeved on the outer surface of the enrichment resin frame 57, a second magnetic attraction plate 58 is fixedly installed on the side edge of the sector-shaped embedded frame 56, and the sector-shaped embedded frame 56 is inserted and assembled into the sector-shaped notch 54 through the adsorption and fitting of the second magnetic attraction plate 58 and the first magnetic attraction plate 55.

[0052] The circular ring base 51 is fixedly connected to the inner bottom center of the seawater separation cylinder 1 and serves as the support base of the modular enrichment separation mechanism 5, which adopts an annular structure to ensure the uniformity of seawater flow. The first plug-in circular ring sleeve 52 is a circular ring member with an internal thread clamping groove, which is used for plug-in cooperation with the second plug-in circular ring sleeve 59 of the pre-assembled circular ring frame 53. The two side ends of the pre-assembled circular ring frame 53 are fixedly connected with the second plug-in circular ring sleeve 59, and the pre-assembled circular ring frame 53 can be sequentially upwardly stacked and assembled through the plug-in of the second plug-in circular ring sleeve 59 and the first plug-in circular ring sleeve 52, forming an expandable columnar structure. The height of the enrichment column can be flexibly adjusted according to the seawater treatment capacity, enhancing the adaptability of the device. The plug-in interface adopts a sealing material to prevent leakage and ensure the stability of the separation process. The first magnetic attraction plate 55 is made of a permanent magnet material and is used to provide an adsorption force. The pre-assembled circular ring frame 53 is quickly assembled through the cooperation of the plug-in circular ring sleeve, and the design of the sector-shaped notch 54 and the magnetic attraction plate ensures the accurate positioning and firm fixation of the enrichment resin frame 57, which not only facilitates the replacement of the failed adsorbent, but also allows local maintenance without stopping the machine, especially suitable for long-term ocean monitoring scenarios. In addition, the circumferential distribution of the sector-shaped notch 54 optimizes the seawater flow path, making the radioactive cesium ions more uniformly contact the adsorption material, improving the separation efficiency, and the separable design of the enrichment resin frame 57 and the sector-shaped embedded frame 56 further expands the function. The sector-shaped embedded frame 56 can be individually detached for cleaning or recharging of the adsorption resin, reducing material waste and cross-contamination risk.

[0053] As shown in FIG. 1, the modular enrichment separation mechanism 5 comprises a circular ring base 51 fixedly connected to the inner bottom center of the seawater separation cylinder 1, the upper surface of the circular ring base 51 is fixedly connected with a first plug-in circular ring sleeve 52, the two side ends of a pre-assembled circular ring frame 53 are also fixedly connected with a second plug-in circular ring sleeve 59, and the pre-assembled circular ring frame 53 is sequentially upwardly assembled through the plug-in cooperation of the second plug-in circular ring sleeve 59 and the first plug-in circular ring sleeve 52, and a plurality of sector-shaped notches 54 are circumferentially formed on the side edges of each pre-assembled circular ring frame 53, a first magnetic attraction plate 55 is fixedly installed on the side edge of each sector-shaped notch 54, the enrichment resin frame 57 is also sector-shaped, and a sector-shaped embedded frame 56 is sleeved on the outer surface of the enrichment resin frame 57, a second magnetic attraction plate 58 is fixedly installed on the side edge of the sector-shaped embedded frame 56, and the sector-shaped embedded frame 56 is inserted and assembled into the sector-shaped notch 54 through the adsorption and fitting of the second magnetic attraction plate 58 and the first magnetic attraction plate 55. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 ,Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 As shown in the figure, the self-taking and placing mechanism 6 includes a second circular sleeve 61 which is slidably sleeved on the outside of the circular cylinder composed of a plurality of pre-assembled circular frames 53. The outer edge of the second circular sleeve 61 is fixedly connected with a magnetic circular edge 62 which is tightly sealed against the inner wall of the seawater separation cylinder 1. The bottom surface of the second circular sleeve 61 is provided with symmetrically arranged taking and placing modules 63, and each taking and placing module 63 is provided with a sealing module 64 on the side facing the pre-assembled circular frame 53. The taking and placing module 63 includes a T-shaped arc-shaped cavity 631, and the side of the T-shaped arc-shaped cavity 631 facing the pre-assembled circular frame 53 is open. The inside of the T-shaped arc-shaped cavity 631 is fixedly installed with a first servo telescopic rod 632, and the output end of the first servo telescopic rod 632 is telescopically movable towards the side of the pre-assembled circular frame 53.

[0054] The self-taking and placing mechanism 6 is driven by the magnetic attraction of the external magnetic attraction traction mechanism 4 to realize the movement around the modular enrichment and separation mechanism 5, and cooperates with the taking and placing module 63 to complete the synchronous taking and inserting of the enrichment resin frame 57, thereby achieving the self-maintenance function of the separation end. The self-taking and placing mechanism 6 mainly includes the second circular sleeve 61, the magnetic circular edge 62, the taking and placing module 63, and the sealing module 64. The second circular sleeve 61 of the self-taking and placing mechanism 6 is slidably sleeved on the outside of the circular cylinder composed of a plurality of pre-assembled circular frames 53. The outer edge of the second circular sleeve 61 is fixedly connected with the magnetic circular edge 62 which is tightly sealed against the inner wall of the seawater separation cylinder 1 by using flexible rubber sealing material, thereby preventing seawater leakage and reducing frictional resistance. The bottom surface of the second circular sleeve 61 is provided with two groups of symmetrically arranged taking and placing modules 63. Each taking and placing module 63 is provided with a sealing module 64 on the side facing the pre-assembled circular frame 53, which is used for sealing the taking and placing port during non-operation period to avoid seawater interference. The side of the T-shaped arc-shaped cavity 631 facing the pre-assembled circular frame 53 is open. The output end of the first servo telescopic rod 632 inside the T-shaped arc-shaped cavity 631 is telescopically movable towards the pre-assembled circular frame 53. The end is used for adsorbing and grabbing the enrichment resin frame 57, which is a telescopic rod structure capable of servo telescoping in the prior art.

[0055] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9As shown, the outer magnetic attraction type traction mechanism 4 includes a first servo motor 41 connected to the bottom of the outer surface of the seawater separation cylinder 1, a threaded rod 42 fixedly installed on the output end of the first servo motor 41, flush with the seawater separation cylinder 1, a first circular ring sleeve 43 sleeved on the outer surface of the seawater separation cylinder 1 and engaged with the threaded rod 42, a circular ring gear sleeve 44 movably installed on the first circular ring sleeve 43, a toothed opening provided on the outer circular edge of the circular ring gear sleeve 44, an electrically controlled magnetic attraction type circular ring sleeve 46 fixedly installed on the upper surface of the circular ring gear sleeve 44, the magnetic attraction end of the electrically controlled magnetic attraction type circular ring sleeve 46 being attracted to the magnetic attraction circular ring edge 62 across the seawater separation cylinder 1, a second servo motor 45 fixedly installed on the side edge of the first circular ring sleeve 43, and a toothed disc fixedly installed on the output end of the second servo motor 45 and engaged with the outer circular toothed opening of the circular ring gear sleeve 44.

[0056] The outer magnetic attraction type traction mechanism 4 is configured to drive the self-taking and placing mechanism 6 to move, and controls the up-down movement and rotation around the cylinder of the self-taking and placing mechanism 6 through magnetic attraction coupling across the cylinder wall of the seawater separation cylinder 1, thereby completing the automatic replacement of the enriched resin frame 57. The first servo motor 41, the threaded rod 42, the first circular ring sleeve 43, the circular ring gear sleeve 44, the electrically controlled magnetic attraction type circular ring sleeve 46, and the second servo motor 45 are included to realize non-contact driving and ensure the sealing and operation safety of the device. The first servo motor 41 is fixedly installed at the position of the bottom of the outer wall of the seawater separation cylinder 1, and an integral outer convex circular ring is provided at the position of the bottom of the outer wall of the seawater separation cylinder 1 for assembly and fixation of the first servo motor 41. The output end of the first servo motor 41 is connected with the threaded rod 42 flush with the cylinder wall of the seawater separation cylinder 1. The threaded rod 42 is engaged with the first circular ring sleeve 43 sleeved on the outer wall of the seawater separation cylinder 1 through threads, and drives the first circular ring sleeve 43 to move up and down along the cylinder wall when the first servo motor 41 rotates. The circular ring gear sleeve 44 with the same center is movably installed on the first circular ring sleeve 43, the outer circular edge of the circular ring gear sleeve 44 has a toothed opening, the second servo motor 45 is fixedly installed on the side edge of the first circular ring sleeve 43, and the output end of the second servo motor 45 is installed with a toothed disc engaged with the toothed opening of the circular ring gear sleeve 44. The rotation of the circular ring gear sleeve 44 around the axis of the seawater separation cylinder 1 can be driven by controlling the forward and reverse rotation of the second servo motor 45. The upper surface of the circular ring gear sleeve 44 is fixedly installed with the electrically controlled magnetic attraction type circular ring sleeve 46, which adopts an array of electromagnets and permanent magnets, with the magnetic attraction end facing the cylinder wall of the seawater separation cylinder 1 and magnetically attracted to the magnetic attraction circular ring edge 62 of the internal self-taking and placing mechanism 6. When the electrically controlled magnetic attraction type circular ring sleeve 46 is powered, a strong magnetic field is generated, penetrating the transparent wall of the seawater separation cylinder 1 and attracting the magnetic attraction circular ring edge 62, thereby transmitting external motion to the internal self-taking and placing mechanism 6.

[0057] As shown in FIG. 6, the seawater separation device 100 includes a seawater separation cylinder 1, a seawater separation mechanism 2, a resin enrichment mechanism 3, an outer magnetic attraction type traction mechanism 4, a self-taking and placing mechanism 6, a resin enrichment frame 57, a resin enrichment frame 58, a resin enrichment frame 59, a resin enrichment frame 60, and a resin enrichment frame 61. Figure 1 , Figure 2 , Figure 3 , Figure 4 ,Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 As shown in the figure, the bottom of the seawater separation cylinder 1 is fixedly connected with a base support cover 3, a drain pipe 9 is fixedly installed on the side wall of the base support cover 3, the drain pipe 9 is connected to the bottom center position of the seawater separation cylinder 1 and is communicated with the inside of the circular ring base 51 to drain away the seawater after the adsorption separation, a detection unit 47 is fixedly installed on the upper surface of the electric control magnetic suction type circular ring cover 46, the detection end of the detection unit 47 is close to the outer surface of the seawater separation cylinder 1, and the outer surface of the seawater separation cylinder 1 is transparent, and the inside of the circular ring base 51 is also provided with a vortex adsorption mechanism 7 capable of generating vortex at the center end of the seawater separation cylinder 1 to drive the seawater to the one end of the modularized enrichment separation mechanism 5 for separation and adsorption.

[0058] The detection unit 47 is fixed on the upper surface of the electric control magnetic suction type circular ring cover 46, the detection end thereof is close to the outer wall of the seawater separation cylinder 1, the position of the magnetic suction circular ring edge 62 is monitored in real time through an optical encoder and a Hall sensor in the prior art, and feedback is given to the control system to realize closed-loop control and ensure that the moving precision is within the millimeter level. In order to ensure the stability of the detection end, an optical sensing module is also integrated in the inside of the detection unit 47, the color change or optical property change of the adsorbent in the enrichment resin frame 57 due to the loading of cesium ions is monitored through the light signal transmitted by the cylinder wall, and the radioactivity around the resin frame is directly quantitatively monitored, which is a common module for detecting the loading of cesium ions in the prior art.

[0059] As shown in the figure, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 The vortex adsorption mechanism 7 includes a third servo motor 71 fixedly installed at the center position in the inside of the circular ring base 51, a cavity rod 72 is fixedly installed on the output end of the third servo motor 71, a plurality of turbine blades 73 are fixedly connected on the outer surface of the cavity rod 72 in sequence from top to bottom, a second servo telescopic rod 74 is fixedly installed in the inside of the cavity rod 72, the extending end of the second servo telescopic rod 74 faces the top of the cavity rod 72 and extends from the top of the cavity rod 72, a magnetic suction disc 75 is fixedly installed on the extending end, an electric control magnetic suction cover 76 is movably installed on the magnetic suction disc 75, the magnetic suction end of the electric control magnetic suction cover 76 is attached to the upper surface of the magnetic suction disc 75, and a water outlet 77 is formed around the position outside the third servo motor 71 at the bottom of the circular ring base 51.

[0060] The configured turbine adsorption mechanism 7 is a power component for driving seawater flow and optimizing separation efficiency, which promotes seawater to actively converge to the modular enrichment separation mechanism 5 by generating a centripetal vortex, thereby improving the adsorption and separation effect of radioactive cesium. The third servo motor 71 is fixed at the center of the inner circle of the circular base 51, and the output end is connected to the cavity rod 72. A plurality of groups of turbine blades 73 are fixed and installed on the outer surface of the cavity rod 72 from top to bottom. The turbine blades 73 adopt a twisted airfoil design, and the inclination and curvature are optimized by fluid dynamics, which can generate high-strength vortex under low energy consumption and avoid flow dead zones. When the third servo motor 71 is started, it drives the cavity rod 72 and the turbine blades 73 to rotate at high speed, forming a strong centripetal vortex in the central area of the seawater separation cylinder 1. The vortex has a tangential and radial composite flow velocity, which can continuously push the seawater in the cylinder to the center of the modular enrichment separation mechanism 5, so that the seawater can fully pass through the fan-shaped notch 54 of each pre-assembled circular ring frame 53, and ensure that the radioactive cesium ions and the adsorbent in the enrichment resin frame 57 are in large-area contact. During the vortex adsorption process, the seawater completes the cesium ion adsorption at the modular enrichment separation mechanism 5 and is gathered downward under the action of fluid pressure to the inside of the circular base 51. A ring-shaped water outlet 77 is formed around the outer side of the third servo motor 71 at the bottom of the circular base 51. The seawater after adsorption is gathered into the lower cavity of the circular base 51 through the water outlet 77. The lower cavity of the circular base 51 is connected with the drain pipe 9, and the drain pipe 9 is fixed to the side wall of the base support cover 3 and extends to the outside, forming a complete drainage path.

[0061] In the actual working process, by adjusting the rotating speed of the third servo motor 71, the balance between the vortex intensity and the drainage flow rate can be controlled to ensure that the adsorption process has enough residence time, while maintaining continuous water output to avoid high liquid level in the cylinder. The cavity rod 72 of the turbine adsorption mechanism 7 is also provided with a second servo telescopic rod 74, the extending end of which is directed towards the top of the cavity rod 72, and the end is fixed with a magnetic suction disc 75. The electric control magnetic suction sleeve 76 is installed on the upper surface of the magnetic suction disc 75 through magnetic suction cooperation, and the connection state between the electric control magnetic suction sleeve 76 and the magnetic suction disc 75 can be changed by electric control of the magnetic suction end of the electric control magnetic suction sleeve 76.

[0062] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the outer part of the electric control magnetic suction sleeve 76 is provided with an activation mechanism 8, which includes a bent cavity rod 81, the extending end of which is movably mounted with a cavity rotating drum 82, which is flush with the circular ring cylinder composed of a plurality of pre-assembled circular ring frames 53. The cavity rotating drum 82 is hollow inside, and a injection sleeve 83 is fixedly installed inside the cavity. The output end of the injection sleeve 83 is fixedly connected with a shunt cylinder 84, and a plurality of drainage hoses 85 are connected in parallel with the shunt cylinder 84. Each drainage hose 85 is attached to the inner wall of the cavity rotating drum 82 and extends from the top of the side wall of the cavity rotating drum 82. A scraping sleeve 86 is sleeved on the outer surface of the cavity rotating drum 82, and the scraping sleeve 86 is in contact with the drainage hose 85 extending from the side wall of the cavity rotating drum 82.

[0063] The activation mechanism 8 includes a bent cavity rod 81, the extending end of which is movably mounted with a cavity rotating drum 82 through a bearing structure. The cavity rotating drum 82 is coaxially flush with the enrichment column composed of pre-assembled circular ring frames 53. A scraping sleeve 86 is sleeved on the outer surface of the cavity rotating drum 82, and the scraping sleeve 86 is made of flexible wear-resistant material and corresponds to the outlet position of the drainage hose 85. The linkage mechanism of the activation mechanism 8 and the turbine adsorption mechanism 7 is integrated through magnetic attraction connection. The electric control magnetic suction sleeve 76 is sleeved on the upper surface of the magnetic suction disc 75. By controlling the power-on state of the magnetic attraction end, the adsorption force with the magnetic suction disc 75 can be adjusted. When the activation function is needed, the second servo telescopic rod 74 is retracted and pulled down, and the electric control magnetic suction sleeve 76 is controlled to be in close contact with the magnetic suction disc 75. At this time, the electric control magnetic suction sleeve 76 is powered on to generate a strong magnetic field, and the magnetic suction disc 75 forms a firm magnetic suction connection, so that the bent cavity rod 81 and the cavity rod 72 form a rigid integrated structure. In this state, when the third servo motor 71 drives the turbine blade 73 to rotate, the cavity rotating drum 82 will be synchronously driven to rotate around the axis of the enrichment column. In the adsorption linkage working state, the activation mechanism 8 performs reagent coating and surface cleaning. The scraping sleeve 86 uniformly coats the reagent on the outer surface of the enrichment column composed of the modular enrichment and separation mechanism 5, and simultaneously removes the attached pollutants through scraping. When the activation function is not needed, the second servo telescopic rod 74 is extended upwards, and the magnetic attraction end is powered off to eliminate the magnetism through the electric control magnetic suction sleeve 76, so that the connection between the electric control magnetic suction sleeve 76 and the magnetic suction disc 75 becomes a movable connection. At this time, the turbine adsorption mechanism 7 works independently to generate eddy current, and the activation mechanism 8 is extended upwards to remain in a stationary state, thereby avoiding unnecessary energy consumption and wear.

[0064] As shown in FIG. 1, the enrichment and separation device 1 includes a turbine adsorption mechanism 7, an activation mechanism 8, a magnetic suction disc 75, a third servo motor 71, a turbine blade 73, a cavity rod 72, a second servo telescopic rod 74, an electric control magnetic suction sleeve 76, a cavity rotating drum 82, a scraping sleeve 86, a shunt cylinder 84, and a plurality of drainage hoses 85. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the activation mechanism 8 further comprises an injection push rod 87 inserted inside the injection sleeve 83, an outer convex disc 88 fixedly installed on the outer extending end of the injection push rod 87, a reset spring 89 fixedly installed on the outer convex disc 88 clamped in the bottom of the cavity of the cavity rotating cylinder 82, the reset spring 89 always pulls the injection push rod 87 to extend outward, the extending end of the injection push rod 87 penetrates through the bottom of the cavity rotating cylinder 82, and a trigger extending rod 810 is fixedly installed on the penetrating end, the trigger extending rod 810 is fixedly installed with a ball sleeve 811, the upper surface of the second circular ring sleeve 61 is fixedly installed with a wavy circular ring base 813, the ball of the ball sleeve 811 always adheres to the upper surface of the wavy circular ring base 813 under the outward pulling action of the reset spring 89, the inside of the bent cavity rod 81 is further fixedly installed with a liquid supplementing adsorption hose 812, one side of the liquid supplementing adsorption hose 812 is connected to the injection sleeve 83, and the other side penetrates through the bent cavity rod 81.

[0065] Wherein, the configured injection push rod 87 is inserted into the inside of the injection sleeve 83 to form a piston fit, the outer end of which is fixedly installed with an outer convex disc 88, which is fixedly installed with a reset spring 89 through a buckle structure, the other end of which is clamped to the bottom of the cavity in the cavity rotating barrel 82. Under the continuous pulling force of the reset spring 89, the injection push rod 87 is constantly pulled outward, keeping the tendency of outward extension. The extended end of the injection push rod 87 penetrates through the bottom of the cavity rotating barrel 82, and the terminal end is fixedly installed with a trigger extension rod 810, the end of which is installed with a ball sleeve 811, which contains freely rolling precision balls inside. A wavy annular base 813 is fixedly installed on the upper surface of the second circular ring sleeve 61, and the upper surface of the base is processed with a continuous wavy curved surface profile. During the working process of the activation mechanism 8, when the turbine suction mechanism 7 drives the cavity rotating barrel 82 to rotate around the modularized enrichment and separation mechanism 5, the fixed wavy annular base 813 and the rotating ball sleeve 811 produce relative motion, and the balls in the ball sleeve 811 always stick to the wavy curved surface of the wavy annular base 813 and roll under the constant pulling force of the reset spring 89. With the rotation, the balls roll along the wave crest and trough of the wavy curved surface alternately, driving the trigger extension rod 810 and the injection push rod 87 to make periodic up-and-down reciprocating motion. When the balls roll to the trough position, the reset spring 89 pulls the injection push rod 87 to extend outward, generating negative pressure in the inner cavity of the injection sleeve 83, and the reagent is sucked in through the liquid supplementing and adsorbing hose 812. When the balls roll to the wave crest position, the injection push rod 87 is pushed inward to compress, and the quantitative reagent is distributed to each drainage hose 85 through the shunt cylinder 84, realizing interval and pulse reagent extrusion. The reagent output can be controlled by adjusting the rotating speed of the third servo motor 71, the shunt cylinder 84 uniformly distributes the reagent to the multiple drainage hoses 85, ensuring that each drainage hose 85 obtains equal amount of reagent, so as to realize uniform coverage of the enrichment column surface under the rotation and coating of the scraping sleeve 86. The extension and retraction length of the second servo telescopic rod 74 provides the system with working state switching function in actual working process. When it is needed to pause reagent extrusion, the second servo telescopic rod 74 is controlled to extend outward, pushing the electric control magnetic suction sleeve 76 and the entire activation mechanism 8 connected thereto to move upward, so that the ball sleeve 811 is out of contact with the wavy annular base 813. In this state, the injection push rod 87 remains stationary and no longer reciprocates, and the reagent supply is interrupted. When it is needed to reactivate, the second servo telescopic rod 74 is retracted to pull downward, so that the ball sleeve 811 is in contact with the wavy annular base 813 again, and the system resumes periodic work, realizing instant start and stop control of reagent coating, avoiding unnecessary waste of reagent. The liquid supplementing and adsorbing hose 812 is connected to the liquid supplementing port of the injection sleeve 83 at one end, penetrates through the bent cavity rod 81 to connect external supplementing device at the other end, and is assembled with a one-way valve to ensure that only reagent can be sucked in.

[0066] As Figure 1 ,Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 As shown in the drawings, the pick-and-place module 63 further comprises a circular arc hollow frame 633 fixedly installed on the output end of the first servo telescopic rod 632, the sidewall of the circular arc hollow frame 633 is provided with a magnetic attraction coating 634, the pressure detection rods 635 are fixedly installed on the sidewalls of both sides of the T-shaped arc-shaped cavity 631, and the outer turning bottom plates 636 are hingedly installed at the bottoms of the T-shaped arc-shaped cavities 631. The bottom of the seawater separation cylinder 1 is also provided with a dismounting plate to open the outer turning bottom plates 636 for turning outwards.

[0067] The pressure detection rods 635 are detection components for taking the enriched resin frame 57, which can ensure the operation in place and reliability of the self-pick-and-place mechanism 6 in the process of taking and replacing the enriched resin frame 57 by monitoring the contact pressure change in the T-shaped arc-shaped cavity 631 in real time. The pressure detection rods 635 are fixedly installed on the sidewalls of both sides of the T-shaped arc-shaped cavity 631, which are symmetrically arranged and work cooperatively with the first servo telescopic rod 632 and the circular arc hollow frame 633. The pressure detection rods 635 are high-precision piezoresistive sensors in the prior art, the detection end of which faces the opening side of the T-shaped arc-shaped cavity 631, which is used for directly sensing the contact pressure generated when the enriched resin frame 57 is inserted or taken out. When the first servo telescopic rod 632 is extended to drive the circular arc hollow frame 633 to move towards the fan-shaped notch 54 of the pre-assembled circular ring frame 53, the enriched resin frame 57 gradually separates from the T-shaped arc-shaped cavity 631, at this time, the sidewall of the fan-shaped embedded frame 56 of the enriched resin frame 57 gradually separates from the detection end of the pressure detection rod 635, so as to facilitate the device to determine that the conveying operation is completed, and then stop the extension movement of the first servo telescopic rod 632. Similarly, when the first servo telescopic rod 632 is retracted, the enriched resin frame 57 gradually enters the T-shaped arc-shaped cavity 631, at this time, the sidewall of the fan-shaped embedded frame 56 of the enriched resin frame 57 gradually contacts the detection end of the pressure detection rod 635 until it is in place. The outer turning bottom plates 636 are configured to turn outwards downwardly, and cooperate with the dismounting plate at the bottom of the seawater separation cylinder 1 to quickly maintain the pick-and-place module 63.

[0068] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9As shown, the sealing module 64 includes an arc-shaped frame 641, the upper and lower sides of the frame are fixedly connected with limiting side frames 642, a spring winding drum 643 is fixedly installed on one side of the arc-shaped frame 641, and an electric control winding drum 644 is fixedly installed on the other side, two traction pull ropes 645 accommodated in the limiting side frames 642 are wound on the electric control winding drum 644, a clamping plate 646 is fixedly connected to the outer side of the traction pull rope 645, the clamping plate 646 is slidably clamped in the limiting side frame 642, and a sealing cloth cover 647 is wound on the spring winding drum 643, and the extending end of the sealing cloth cover 647 is connected to the side wall of the clamping plate 646.

[0069] The sealing module 64 is configured to seal and isolate the key functional components of the self-taking and placing mechanism 6 during the process of taking and replacing the enriched resin frame 57, and prevent seawater leakage by unwinding and winding the flexible sealing cloth cover 647, so as to ensure the closedness and safety of the operation environment. The sealing module 64 includes an arc-shaped frame 641 made of lightweight alloy, which matches the curvature of the inner wall of the seawater separation cylinder 1, and ensures close fitting with the cylinder wall. The upper and lower sides of the frame of the arc-shaped frame 641 are fixedly connected with limiting side frames 642 by bolts, the limiting side frames 642 are internally provided with a sliding groove structure for guiding the arc-shaped movement of the clamping plate 646, a spring winding drum 643 is fixedly installed on one side of the arc-shaped frame 641, which is internally integrated with a torsion spring to provide continuous winding force, and an electric control winding drum 644 is fixedly installed on the other side, which is driven by a micro servo motor to control the winding and unwinding speed. Two high-strength traction pull ropes 645 are wound on the electric control winding drum 644, the traction pull ropes 645 are made of corrosion-resistant fiber material and are accommodated in the sliding groove of the limiting side frame 642 to avoid interference with external components. The outer end of the traction pull rope 645 is fixedly connected with the clamping plate 646, and the clamping plate 646 is designed in a sliding fit, the edge of which is embedded in the sliding groove of the limiting side frame 642 to ensure that it can only move horizontally along the frame direction, and a sealing cloth cover 647 is wound on the spring winding drum 643, which is made of multiple layers of composite flexible material and has corrosion resistance and tear resistance, and the extending end is connected to the side wall of the clamping plate 646 by buckling or sewing.

[0070] In the sealed working state, the electric control winding drum 644 receives the instruction to start, and through the positive rotation of the servo motor, the traction rope 645 is wound to pull the clamping plate 646 to slide along the sliding groove of the limiting side frame 642 to one side of the electric control winding drum 644. The movement of the clamping plate 646 synchronously pulls the sealing cloth cover 647 to unfold from the spring winding drum 643. The sealing cloth cover 647 gradually covers the opening area of the arc-shaped frame 641 to form a flexible sealing barrier. In the unfolding process of the sealing cloth cover 647, the edge thereof is pressed against the inner wall of the seawater separation cylinder 1 or the adjacent component, and relies on the material elasticity to adapt to the irregular surface to ensure the integrity of the sealing. When the operation is completed and the sealing needs to be released, the electric control winding drum 644 reverses to release the traction rope 645, and the spring winding drum 643 automatically winds the sealing cloth cover 647 under the action of the torsional spring, drives the clamping plate 646 to slide back to the initial position, and the sealing cloth cover 647 is quickly wound up to restore the unobstructed passage.

[0071] The use method provided by the application is as follows:

[0072] In use, first, based on the real-time monitoring of the cesium adsorption state in the seawater separation cylinder 1 by the detection unit 47, the control device starts the separation pretreatment process. The detection unit 47 is fixed on the upper surface of the electric control magnetic type ring sleeve 46, and the detection end thereof is tightly attached to the outer wall of the seawater separation cylinder 1. The optical sensing module scans the change in the optical properties of the enrichment resin frame 57 of the modular enrichment and separation mechanism 5 due to the adsorption of cesium ions, and quantitatively evaluates the adsorption saturation. When the monitoring data shows that the adsorption capacity of the enrichment resin frame 57 approaches the threshold value, the turbine adsorption mechanism 7 works, the third servo motor 71 of the turbine adsorption mechanism 7 is started, drives the cavity rod 72 and the turbine blade 73 fixed on the outer surface thereof to rotate at high speed, and generates strong centripetal vortex in the center area of the seawater separation cylinder 1. The vortex has tangential and radial composite flow velocity, can continuously push the seawater in the cylinder to the center of the modular enrichment and separation mechanism 5, makes the seawater fully pass through the fan-shaped notch 54 of the pre-assembled ring frame 53, and ensures that the radioactive cesium ions are in large-area contact with the adsorbent in the enrichment resin frame 57. In this process, the seawater flows from the top filter cover 2, removes large-particle impurities after passing through the multiple layers of filter screens, and is uniformly distributed to the inside of the cylinder. At the same time, the water outlet 77 at the bottom of the ring base 51 is connected with the drain pipe 9, and the seawater after adsorption is gathered downward under the action of fluid pressure and discharged, thereby maintaining the balance of the liquid level in the cylinder.

[0073] Then, during the vortex adsorption process, the enrichment resin frame 57 of the modular enrichment separation mechanism 5 is fixed by the magnetic adsorption of the second magnetic adsorption plate 58 on the side of the fan-shaped embedded frame 56 to the first magnetic adsorption plate 55 on the side of the fan-shaped notch 54 of the pre-assembled circular ring frame 53, forming a stable separation enrichment column. The radioactive cesium ions in seawater are specifically trapped in the adsorbent of the enrichment resin frame 57, completing preliminary enrichment, and the detection unit 47 monitors the adsorption load of each layer of the pre-assembled circular ring frame 53 in real time. When the enrichment resin frame 57 at a specific fan-shaped notch 54 reaches a saturation state, the system records its position coordinates and prepares to trigger the self-maintenance program. The outer magnetic adsorption type traction mechanism 4 is in standby state, and the first servo motor 41 adjusts the initial height of the self-taking and placing mechanism 6 by engaging the threaded rod 42 with the first circular ring sleeve 43, so that the taking and placing module 63 is aligned with the target pre-assembled circular ring frame 53. The electrically controlled magnetic adsorption type circular ring sleeve 46 generates a magnetic field, and the magnetic adsorption circular ring edge 62 of the self-taking and placing mechanism 6 is adsorbed through the transparent wall of the seawater separation cylinder 1, establishing magnetic adsorption coupling. At this time, the vortex adsorption mechanism 7 runs at low speed to maintain the basic vortex to prevent sedimentation, thereby reducing downtime and ensuring the continuity of the separation process.

[0074] Then, when the detection unit 47 confirms that the enrichment resin frame 57 needs to be replaced, the system starts the maintenance operation of the self-taking and placing mechanism 6, and the second servo motor 45 of the outer magnetic adsorption type traction mechanism 4 drives the gear disc to rotate, engages the teeth of the outer circle of the circular gear sleeve 44, and drives the electrically controlled magnetic adsorption type circular ring sleeve 46 and the adsorbed self-taking and placing mechanism 6 to rotate around the axis of the seawater separation cylinder 1, positioning the taking and placing module 63 to the target fan-shaped notch 54. At the same time, the first servo motor 41 adjusts the vertical position of the self-taking and placing mechanism 6 through the threaded rod 42, so that the T-shaped arc-shaped cavity 631 is aligned with the failed enrichment resin frame 57. The first servo telescopic rod 632 of the taking and placing module 63 extends, drives the circular arc hollow frame 633 to move towards the pre-assembled circular ring frame 53, and the magnetic adsorption coating 634 at the end contacts and adsorbs the fan-shaped embedded frame 56 of the saturated enrichment resin frame 57, and then retracts by contraction. During the retraction process, the pressure detection rod 635 monitors the contact pressure in real time, and when the pressure value reaches the preset threshold, it is determined that the retraction is complete. Then, through the first servo telescopic rod 632 on the other side, the new fan-shaped embedded frame 56 placed on the extended end is controlled to extend, and the new enrichment resin frame 57 is inserted into the fan-shaped notch 54 and fixed by magnetic adsorption. The sealing cover 647 of the sealing module 64 is expanded under the cooperation of the spring winding drum 643 and the electrically controlled winding drum 644, covering the operation area to prevent leakage.

[0075] The present application encompasses any alternatives, modifications, equivalent methods and solutions made to the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits, etc. are not described in detail.

[0076] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, which should be considered as the protection scope of the present application.

Claims

1. A pretreatment device for separating radioactive cesium in seawater, comprising a seawater separation cylinder (1), wherein a filter cover (2) for filtering impurities is assembled on the top of the seawater separation cylinder (1), characterized in that: The seawater separation cylinder (1) is equipped with a modular enrichment separation mechanism (5) at its inner center. The modular enrichment separation mechanism (5) is composed of several pre-assembled circular frames (53) stacked upwards. Each pre-assembled circular frame (53) has several enrichment resin frames (57) magnetically adsorbed on it to form a modular separation enrichment column at the center end of the seawater separation cylinder (1). The outer surface of the seawater separation cylinder (1) is provided with an external magnetic traction mechanism (4) that can move up and down along the cylinder wall and rotate around the cylinder. The modular enrichment separation mechanism (5) is slidably provided with a self-retrieving and placing mechanism (6). The self-retrieving and placing mechanism (6) is provided with two sets of symmetrically arranged picking and placing modules (63). Each set of picking and placing modules (63) is provided with a first servo telescopic rod (632) for telescopically picking up and replacing the enriched resin frame (57). Among them, the external magnetic traction mechanism (4) is magnetically connected to the self-retrieving and placing mechanism (6), so as to control the self-retrieving and placing mechanism (6) to move around the modular enrichment and separation mechanism (5) through the seawater separation cylinder (1), and to pick up the failed enrichment resin frame (57) through the first servo telescopic rod (632) of the one-side picking and placing module (63), and simultaneously insert a new enrichment resin frame (57) on the other side to complete the self-maintenance work of the separation end; The modular enrichment and separation mechanism (5) includes a circular base (51) fixedly connected to the center of the bottom of the seawater separation cylinder (1). A first insertable circular sleeve (52) is fixedly connected to the upper surface of the circular base (51). A second insertable circular sleeve (59) is also fixedly connected to both ends of the pre-assembled circular frame (53). The pre-assembled circular frame (53) is assembled upwards sequentially through the insertion and engagement of the second insertable circular sleeve (59) and the first insertable circular sleeve (52). The sides are provided with several fan-shaped slots (54) in a circular pattern. A first magnetic plate (55) is fixedly installed on the side of each fan-shaped slot (54). The resin enrichment frame (57) is also fan-shaped as a whole, and the outer surface is fitted with a fan-shaped inner frame (56). A second magnetic plate (58) is fixedly installed on the side of each fan-shaped inner frame (56). The second magnetic plate (58) is inserted into the fan-shaped slot (54) one by one by adsorption and bonding with the first magnetic plate (55). The self-loading mechanism (6) includes a second ring sleeve (61), which is slidably fitted onto the outside of a ring cylinder composed of several pre-assembled ring frames (53). A magnetic ring edge (62) that is sealed tightly against the inner wall of the seawater separation cylinder (1) is fixedly connected to the outer edge of the second ring sleeve (61). A symmetrical loading and unloading module (63) is arranged on the bottom surface of the second ring sleeve (61), and a sealing module (64) is arranged on the side of each loading and unloading module (63) facing the pre-assembled ring frame (53). The loading and unloading module (63) includes a T-shaped arc cavity (631), and the side of the T-shaped arc cavity (631) facing the pre-assembled ring frame (53) is open. A first servo telescopic rod (632) is fixedly installed inside the T-shaped arc cavity (631), and the output end of the first servo telescopic rod (632) moves telescopically toward the side of the pre-assembled ring frame (53).

2. The pretreatment device for separating radioactive cesium in seawater according to claim 1, characterized in that, The external magnetic traction mechanism (4) includes a first servo motor (41) connected to the bottom of the outer surface of the seawater separation cylinder (1). A threaded rod (42) flush with the seawater separation cylinder (1) is fixedly installed on the output end of the first servo motor (41). A first annular sleeve (43) meshing with the threaded rod (42) is fitted on the outer surface of the seawater separation cylinder (1). A concentric annular gear sleeve (44) is movably installed on the first annular sleeve (43). The outer edge of the ring gear sleeve (44) is provided with a toothed opening. An electrically controlled magnetic ring sleeve (46) is fixedly installed on the upper surface of the ring gear sleeve (44). The magnetic end of the electrically controlled magnetic ring sleeve (46) is attracted to the magnetic ring edge (62) through the seawater separation cylinder (1). A second servo motor (45) is fixedly installed on the side of the first ring sleeve (43). A gear disk that meshes with the outer toothed opening of the ring gear sleeve (44) is fixedly installed on the output end of the second servo motor (45).

3. The pretreatment device for separating radioactive cesium in seawater according to claim 2, characterized in that, The bottom of the seawater separation cylinder (1) is fixedly connected to a base support cover (3). A drain pipe (9) is fixedly installed on the side wall of the base support cover (3). The drain pipe (9) is connected to the center of the bottom of the seawater separation cylinder (1) and is connected to the inside of the circular base (51) to drain the seawater that has completed adsorption and separation. A detection unit (47) is fixedly installed on the upper surface of the electrically controlled magnetic ring sleeve (46). The detection end of the detection unit (47) is close to the outer surface of the seawater separation cylinder (1), and the outer surface of the seawater separation cylinder (1) is visible and transparent. The inside of the circular base (51) is also equipped with a turbine adsorption mechanism (7) that can generate a vortex at the center end of the seawater separation cylinder (1) to drive the seawater to gather towards one end of the modular enrichment and separation mechanism (5) for separation and adsorption.

4. The pretreatment device for separating radioactive cesium in seawater according to claim 3, characterized in that, The turbine adsorption mechanism (7) includes a third servo motor (71) fixedly installed at the center of the inner ring base (51). A cavity rod (72) is fixedly installed on the output end of the third servo motor (71). Several turbine blades (73) are fixedly connected from top to bottom on the outer surface of the cavity rod (72). A second servo telescopic rod (74) is fixedly installed inside the cavity rod (72). The protruding end of the second servo telescopic rod (74) faces the top of the cavity rod (72) and extends from the top of the cavity rod (72). A magnetic chuck (75) is fixedly installed on the protruding end. An electrically controlled magnetic sleeve (76) is movably installed on the magnetic chuck (75). The magnetic end of the electrically controlled magnetic sleeve (76) is attached to the upper surface of the magnetic chuck (75). A water outlet (77) is opened around the bottom of the ring base (51) at the position outside the third servo motor (71).

5. A pretreatment device for separating radioactive cesium in seawater according to claim 4, characterized in that, The electrically controlled magnetic sleeve (76) is externally equipped with an activation mechanism (8), which includes a bent cavity rod (81). A cavity rotating cylinder (82) is movably mounted on the extended end of the bent cavity rod (81). The cavity rotating cylinder (82) is flush with a circular cylinder composed of several pre-assembled circular frames (53). The cavity rotating cylinder (82) is hollow inside, and an injection sleeve (83) is fixedly installed inside the cavity. A diverter cylinder (84) is fixedly connected to the output end of the cylinder (83). Several drainage hoses (85) are connected in parallel to the diverter cylinder (84). Each drainage hose (85) is attached to the inner wall of the cavity rotating cylinder (82) and extends from the top of the side wall of the cavity rotating cylinder (82). A scraping sleeve (86) is fitted on the outer surface of the cavity rotating cylinder (82), and the scraping sleeve (86) connects with the drainage hose (85) extending from the side wall of the cavity rotating cylinder (82).

6. A pretreatment device for separating radioactive cesium in seawater according to claim 5, characterized in that, The activation mechanism (8) further includes an injection push rod (87) inserted into the injection sleeve (83). An external convex plate (88) is fixedly installed on the protruding end of the injection push rod (87). A reset spring (89) is fixedly installed on the external convex plate (88) and is locked at the bottom of the cavity inside the cavity of the rotating cylinder (82). The reset spring (89) pulls the injection push rod (87) to always extend outward, and the protruding end of the injection push rod (87) passes through the bottom of the rotating cylinder (82). A trigger extension rod (810) is fixedly installed on the through end. A ball sleeve (811) is fixedly installed on the extension rod (810), and a wave-shaped ring base (813) is fixedly installed on the upper surface of the second ring sleeve (61). The balls of the ball sleeve (811) are always attached to the upper surface of the wave-shaped ring base (813) under the external pulling action of the return spring (89). A liquid replenishment adsorption hose (812) is also fixedly installed inside the bent cavity rod (81). One side of the liquid replenishment adsorption hose (812) is connected to the injection sleeve (83), and the other side extends out of the bent cavity rod (81).

7. A pretreatment device for separating radioactive cesium in seawater according to claim 6, characterized in that, The pick-and-place module (63) also includes an arc-shaped hollow frame (633) fixedly installed on the output end of the first servo telescopic rod (632). The side wall of the arc-shaped hollow frame (633) is provided with a magnetic coating (634). Pressure detection rods (635) are fixedly installed on the side walls of both sides inside the T-shaped arc cavity (631). The bottom of the T-shaped arc cavity (631) is hinged with an outward-folding bottom plate (636). The bottom of the seawater separation cylinder (1) is also provided with a disassembly plate to open the outward-folding bottom plate (636) for outward folding.

8. A pretreatment device for separating radioactive cesium in seawater according to claim 7, characterized in that, The sealing module (64) includes an arc-shaped frame (641). Limiting side frames (642) are fixedly connected to the upper and lower sides of the arc-shaped frame (641). A spring winding drum (643) is fixedly installed on one side of the arc-shaped frame (641), and an electrically controlled winding drum (644) is fixedly installed on the other side. Two traction ropes (645) stored in the limiting side frames (642) are wound on the electrically controlled winding drum (644). A clamping plate (646) is fixedly connected to the outside of the traction ropes (645). The clamping plate (646) is slidably clamped in the limiting side frames (642). A sealing cloth cover (647) is wound on the spring winding drum (643). The protruding end of the sealing cloth cover (647) is connected to the side wall of the clamping plate (646).

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