Chitosan heavy metal ion detection device and detection method

Abstract

The present invention relates to the technical field of heavy metal ion detection equipment, and specifically to a chitosan heavy metal ion detection equipment and detection method, comprising a base, on which is arranged: a moving component, which includes a moving seat arranged for horizontal sliding and a lifting seat arranged for vertical sliding on the moving seat, a clamping seat rotatably arranged on the lifting seat, a deflection wheel that rotates synchronously with the clamping seat arranged in the lifting seat, the deflection wheel is symmetrically provided with abutment parts, and the moving seat is vertically staggered with protrusions located on both sides of the deflection wheel; a sample pool, a cleaning pool and a detection pool. The chitosan heavy metal ion detection equipment and detection method provided by the invention utilizes a moving seat, a lifting seat and a clamping seat to realize the clamping and constant speed movement of the detection electrode for the soaking, moving cleaning and detection process, thereby avoiding the problem of the gel-like chitosan film breaking and falling off due to the unstable movement speed change of the detection electrode manually.

Description

Technical Field

[0001] The invention relates to the technical field of heavy metal ion detection equipment, and in particular to a chitosan heavy metal ion detection equipment and a detection method. Background Art

[0002] Heavy metal ion pollution is one of the main forms of water pollution. Heavy metal ions are biologically toxic and non-self-degradable, which makes them extremely harmful to water bodies. Heavy metal ions can be discharged into water bodies through various pathways, seriously threatening the life safety of organisms. Cu2+, Cr6+, Cd2+ and Fe3+ are the main harmful heavy metal ions, and people who are exposed to these heavy metal ions for a long time face many health risks. Therefore, the demand for the detection and quantification of heavy metal ions in water sources is increasing. Using heavy metal ion sensors to detect or monitor heavy metal ions in water bodies in real time and establishing a fast, accurate and sensitive heavy metal ion determination technology have very important theoretical and application significance in the field of environmental protection research.

[0003] According to the publication number CN116203090A, the publication (announcement) date is 2023.06.02, and a method for electrochemical detection of heavy metal ions in water by chitosan-modified paper is disclosed. First, chitosan is dissolved in an acidic aqueous solution, and hydrogen peroxide is added after standing and degassing to obtain a chitosan solution by oxidation degradation; chitosan is electrochemically deposited on a carbon paper electrode by a carbon paper electrode; then tannic acid is grafted onto a chitosan film by an electrochemical method again to obtain a chitosan film-modified carbon paper electrode after tannic acid grafting as a detection electrode; the detection electrode is immersed in a heavy metal ion solution for balanced adsorption and then placed in a redox medium mixed solution, and a cyclic voltammetry scan is performed using an electrochemical device, and data analysis is performed using an electroanalysis workstation to detect the concentration of heavy metal ions. The electrode preparation of the present invention has low raw material cost, simple process, fast speed and good sensitivity during the analysis process.

[0004] In the prior art including the above-mentioned patent, a chitosan film modified carbon paper electrode grafted with polyhydroxy ligands is used as a detection electrode. The electrode is first immersed in a detection solution, then washed with ionized water and placed in a redox medium mixed solution, and an electrochemical device is used to perform cyclic voltammetry scanning to detect ion concentration. However, in the process of immersing the detection electrode in the detection solution and transferring it to ionized water for washing, the detection electrode is often manually taken for transfer and washing. The chitosan film is in a gel state after dissolution, and the manual movement speed is unstable, which can easily cause the gel-like chitosan film on the detection electrode to break and fall off, thereby causing errors in the detection data. Summary of the invention

[0005] The purpose of the present invention is to provide a chitosan heavy metal ion detection device and a detection method to solve the above problems.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a chitosan heavy metal ion detection device, comprising a detection electrode, a fixing portion is arranged on the detection electrode, and a base, on which:

[0007] The moving assembly comprises a moving seat which is horizontally slidable and a lifting seat which is vertically slidable on the moving seat, a clamping seat is rotatably arranged on the lifting seat, a deflection wheel which rotates synchronously with the clamping seat is arranged in the lifting seat, the deflection wheel is symmetrically provided with abutment parts, and protrusions which are respectively located on both sides of the deflection wheel are vertically staggered on the moving seat;

[0008] The sample pool, the cleaning pool and the detection pool are sequentially distributed in the horizontal direction below the moving seat;

[0009] The lifting seat is driven to move vertically so that the abutting part moves in sequence to abut and disengage from the protruding part to make the deflection wheel reciprocate, and the clamping seat follows the reciprocating deflection of the deflection wheel to drive the detection electrode to reciprocate and rotate and swing.

[0010] Preferably, the lifting seat is symmetrically rotatably provided with reduction wheels located on both sides of the clamping seat, a weight portion is provided on the reduction wheel, the clamping seat is in a default state so that the detection electrode is vertical and the weight portion is symmetrically distributed about the clamping seat, the reduction wheel and the clamping seat are arranged to rotate synchronously, and the clamping seat is driven to rotate so that the weight portion of one reduction wheel rotates close to and abuts against the clamping seat, and the weight portion of the other reduction wheel rotates close to and away from the clamping seat.

[0011] Preferably, it also includes a locking plate with one end rotatably disposed on the clamping seat, the clamping seat is provided with a locking groove, the locking plate is driven to rotate close to the clamping seat and is connected to the clamping seat by bolts to lock the fixing part in the locking groove.

[0012] Preferably, a contact plate is symmetrically and slidably arranged on the clamping seat, the contact plate contacts the rotation and swinging direction side of the fixed part, a contact slope is arranged on the contact plate, the clamping seat drives the detection electrode to swing so that the load-bearing part of a reduction wheel rotates close to and contacts the contact slope, and the load-bearing part rotates to push the contact plate to slide along the surface direction of the fixed part away from the clamping seat, and an elastic member is arranged in the clamping seat for driving the contact plate to slide and reset.

[0013] Preferably, the lifting seat is provided with a fixing rod, the fixing rod is provided with an inner cavity and an ejection hole connected with the inner cavity, the ejection hole is inclined vertically downward toward the clamping seat, and the movable seat is provided with a piston column part located in the inner cavity for piston movement.

[0014] Preferably, the reduction wheel is provided with a plurality of groups of connecting channels which are symmetrically distributed about the axis of the reduction wheel, and the ejection hole openings face one side of the axis of the reduction wheel. The clamping seat is driven to rotate so that the reduction wheel rotates so that the plurality of connecting channels are intermittently connected with the ejection hole in sequence.

[0015] Preferably, a mounting portion is provided on the fixing rod, and the mounting portion is rotatably mounted in a mounting hole coaxially opened on the clamping seat.

[0016] Preferably, the base is provided with a horizontal slide and a rotatably arranged threaded rod, the movable seat is provided with a sliding groove and a threaded hole, the horizontal slide is slidably matched with the sliding groove, and the threaded rod is threadedly matched with the threaded hole.

[0017] Preferably, the clamping seat is provided with a first ring tooth portion, the reduction wheel is provided with a second ring tooth portion, and the first ring tooth portion and the second ring tooth portion are coupled.

[0018] A chitosan heavy metal ion detection method includes the chitosan heavy metal ion detection device described in the above scheme, and the specific steps are as follows:

[0019] S1. First, the fixed part of the detection electrode is locked and fixed on the clamping seat through a locking plate;

[0020] S2, then the moving seat moves to the vertical upper part of the sample pool, and the lifting seat slides down vertically. At this time, the abutment part of the deflection wheel is abutted by the raised part in turn, driving the clamping seat to deflect, and the reduction wheel deflects synchronously with the clamping seat, so that the detection electrode rotates back and forth while vertically descending into the sample pool. After the detection electrode is immersed in the sample pool, it remains stationary and immersed for a period of time, so that the detection electrode reaches equilibrium in complex adsorption of heavy metal ions;

[0021] S3, the lifting seat slides vertically upward, and the abutment part of the deflection wheel is abutted by the raised part in turn, driving the clamping seat to deflect, so that the detection electrode can be vertically lifted and leave the sample pool while rotating and swinging back and forth;

[0022] S4, the moving seat is moved horizontally to the vertical upper part of the cleaning tank. Similarly to the above, the moving seat is vertically lowered to make the detection electrode rotate and swing back and forth while vertically lowering into the cleaning tank. The ion water in the cleaning tank cleans the surface of the detection electrode. Then the moving seat is vertically raised to make the detection electrode rotate and swing back and forth while vertically rising to leave the cleaning tank.

[0023] S5. The mobile seat is moved horizontally to the vertical upper part of the detection pool. Similarly to the above, the mobile seat is lowered vertically to make the detection electrode rotate and swing back and forth while vertically lowering into the redox medium mixed solution in the detection pool. Cyclic voltammetry scanning is performed using an electrochemical device, and data analysis is performed using an electroanalytical workstation to detect the concentration of heavy metal ions.

[0024] In the above technical scheme, a chitosan heavy metal ion detection device and detection method provided by the present invention have the following beneficial effects: using a moving seat, a lifting seat and a clamping seat to realize the clamping and constant speed movement of the detection electrode for immersion, mobile cleaning and detection processes, avoiding the problem of unstable movement speed changes of the manual detection electrode causing the gel-like chitosan film to break and fall off. Secondly, using a lifting seat, a deflection wheel, a synchronous belt and a protrusion to realize that when the lifting seat drives the clamping seat and the detection electrode to rise and fall vertically, the clamping seat will also perform reciprocating rotation and swing so that the detection electrode can be vertically lifted and lowered while rotating and swinging, so that the detection electrode can swing and rise to enter or leave the solution, avoiding the problem of chitosan film detachment caused by the accumulation of impact force due to the small contact surface when the gel-like chitosan film is immersed in the liquid, thereby improving the accuracy of the detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the structure of a mobile assembly provided by an embodiment of the present invention;

[0028] Figure 3 A schematic cross-sectional view of the structure of a mobile assembly provided by an embodiment of the present invention;

[0029] Figure 4 A schematic cross-sectional view of the structure of a fixing rod provided by an embodiment of the present invention;

[0030] Figure 5 Schematic diagram of the exploded structure of the mobile assembly provided by the embodiment of the present invention

[0031] Figure 6 A schematic diagram of the exploded structure of the clamping seat, the reduction wheel, the deflection wheel and the lifting seat provided in an embodiment of the present invention;

[0032] Figure 7 A schematic diagram of the working principle of the clamping seat provided in an embodiment of the present invention after driving the detection electrode to deflect;

[0033] Figure 8 The embodiment of the present invention provides Figure 3 A local enlarged schematic diagram of the middle A;

[0034] Fig. 9 The embodiment of the present invention provides Figure 7 A local enlarged schematic diagram of point B in the middle.

[0035] Description of reference numerals:

[0036] 1. Base; 11. Horizontal slide; 12. Threaded rod; 13. Sample pool; 14. Cleaning pool; 15. Detection pool; 2. Moving assembly; 21. Moving seat; 211. Sliding groove; 212. Threaded hole; 213. Movable groove; 214. Protrusion; 215. Piston column; 22. Lifting seat; 221. Mounting part; 222. Rack part; 31. Clamping seat; 311. Locking groove; 312. First ring tooth part; 313. Mounting hole; 32, locking plate; 33, resistance plate; 331, resistance slope; 34, elastic member; 41, deflection wheel; 411, resistance part; 42, synchronous belt; 5, reduction wheel; 51, load-bearing part; 52, connecting channel; 53, second ring gear part; 6, fixing rod; 61, inner cavity; 62, mounting part; 63, extension part; 631, ejection hole; 81, driving gear; 82, motor; 91, detection electrode; 911, fixing part. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0038] like Figure 1-9 As shown, a chitosan heavy metal ion detection device and detection method include a detection electrode 91, on which a fixing portion 911 is provided, and a base 1, on which:

[0039] The moving assembly 2 comprises a moving seat 21 which is horizontally slidable and a lifting seat 22 which is vertically slidable on the moving seat 21. A clamping seat 31 is rotatably arranged on the lifting seat 22. A deflection wheel 41 which rotates synchronously with the clamping seat 31 is arranged in the lifting seat 22. The deflection wheel 41 is symmetrically provided with abutment portions 411. The moving seat 21 is vertically staggered with protrusions 214 which are respectively located on both sides of the deflection wheel 41.

[0040] The sample pool 13, the cleaning pool 14 and the detection pool 15 are sequentially distributed in the horizontal direction below the moving seat 21;

[0041] The lifting seat 22 is driven to move vertically so that the abutting portion 411 moves in sequence to abut and disengage from the protruding portion 214 to make the deflection wheel 41 reciprocate, and the clamping seat 31 reciprocates with the deflection wheel 41 to drive the detection electrode 91 to reciprocate and swing.

[0042] Specifically, the base 1 is provided with a movable seat 21, and the movable seat 21 is provided with a vertically sliding lifting seat 22, and the clamping seat 31 is used to lock the fixing portion 911 of the detection electrode 91. When heavy metal ion detection is required, the detection electrode 91 on the clamping seat 31 is first moved to the top of the sample pool 13 by using the movable seat 21, and then the lifting seat 22 is moved to lower the detection electrode 91 and immerse it in the sample pool 13, and then the lifting seat 22 is raised, and the movable seat 21 is moved to the top of the cleaning pool 14, and the lifting seat 22 is vertically lowered to immerse the detection electrode 91 in the ion water in the cleaning pool 14. The detection electrode 91 is then cleaned and finally the lifting seat 22 is raised and the moving seat 21 is moved above the detection tank 15, so that the detection electrode 91 is lowered and immersed in the redox medium mixed solution in the detection tank 15. Cyclic voltammetry scanning is performed using an electrochemical device, and data analysis is performed using an electrical analysis workstation to detect the concentration of heavy metal ions. The moving seat 21, the lifting seat 22 and the clamping seat 31 are used to clamp and move the detection electrode 91 at a constant speed for immersion, mobile cleaning and detection processes, thereby avoiding the problem of unstable movement speed of the detection electrode 91 manually taking the detection electrode 91 and causing the gel-like chitosan film to break and fall off.

[0043] Among them, the clamping seat 31 may be provided with a clamping block that is relatively close to clamp the fixing portion 911 to clamp the detection electrode 91, or a snap fit may be used to fix the detection electrode 91 to the clamping seat 31, or other locking mechanisms known to those skilled in the art may be used to lock the detection electrode 91 to the clamping seat 31. The above-mentioned electrochemical device and the electrical analysis workstation are common technical knowledge known to those skilled in the art and will not be described in detail here.

[0044] Further, such as Figure 3As shown, a movable groove 213 is provided in the movable seat 21, and protrusions 214 are provided on both sides of the deflection wheel 41 in the movable groove 213, and the protrusions 214 are arranged in a vertically staggered manner, the clamping seat 31 and the deflection wheel 41 keep rotating synchronously, and the deflection wheel 41 is symmetrically provided with abutment portions 411. When the lifting seat 22 is driven to move vertically downward or upward, the abutment portion 411 on one side of the deflection wheel 41 first abuts against the protrusion 214 on one side, thereby making the deflection wheel 41 and the clamping seat 31 rotate synchronously. As the lifting seat 22 continues to move, the abutment portion 411 on the other side of the deflection wheel 41 abuts against the protrusion 214 on the other side, thereby making the deflection wheel 41 rotate synchronously in the opposite direction, thereby achieving that the clamping seat 31 keeps swinging back and forth during the lifting and lowering process of the lifting seat 22, and when the lifting seat 22 moves to the highest When the clamping seat 31 is in the upper or lower position, the abutment portion 411 is separated from the protrusion 214 and no longer contacts each other, so that the clamping seat 31 is rotated to the default state under the action of gravity, and the detection electrode 91 on the clamping seat 31 is in a vertical state. The lifting seat 22, the deflection wheel 41, the synchronous belt 42 and the protrusion 214 are used to realize that when the lifting seat 22 drives the clamping seat 31 and the detection electrode 91 to be vertically lifted and lowered, the clamping seat 31 will also perform reciprocating rotation and swing so that the detection electrode 91 can be vertically lifted and lowered while rotating and swinging, so that the detection electrode 91 can swing up and down to enter or leave the solution, so that the detection electrode 91 is in contact with the liquid when it descends into the solution, thereby improving the adsorption efficiency of the detection electrode 91 in the sample pool 13 or the inclination efficiency of the cleaning pool 14 to the detection electrode 91.

[0045] Secondly, the detection electrode 91 swings down and is immersed in the liquid to increase the contact area between the gel-like chitosan film on the outside of the detection electrode 91 and the liquid when it is initially immersed, thereby avoiding the problem of the chitosan film detaching due to the accumulation of impact force caused by the small contact surface when the gel-like chitosan film is immersed in the liquid, thereby improving the accuracy of the detection data; thirdly, the detection electrode 91 swings up and leaves the liquid, thereby utilizing the swing of the detection electrode 91 to throw off the excess droplets adhering to the detection electrode 91 due to the tension of the liquid, thereby further improving the accuracy of subsequent detection data.

[0046] A synchronous belt 42 is further provided in the clamping seat 31 , and the synchronous belt 42 is sleeved on the deflection wheel 41 and the clamping seat 31 to achieve synchronous rotation of the deflection wheel 41 and the clamping seat 31 .

[0047] Furthermore, a horizontal slide 11 and a rotatably arranged threaded rod 12 are provided on the base 1, a sliding groove 211 and a threaded hole 212 are provided on the movable seat 21, the horizontal slide 11 is slidably matched with the sliding groove 211, the threaded rod 12 is threadedly matched with the threaded hole 212, a driving gear 81 and a motor 82 are provided in the movable seat 21, and a rack portion 222 is provided on the lifting seat 22. An electric motor can be provided in the base 1 to drive the threaded rod 12 to rotate, thereby driving the horizontal movement of the movable seat 21 through the rotation of the threaded rod 12, and the motor 82 is used to drive the lifting seat 22 to slide and lift vertically through the driving gear 81 and the rack portion 222.

[0048] In the above technical solution, the moving seat 21, the lifting seat 22 and the clamping seat 31 are used to realize the clamping and constant speed movement of the detection electrode 91 for the soaking, moving cleaning and detection process, so as to avoid the problem of the gel-like chitosan film breaking and falling off caused by the unstable change of the moving speed of the manual picking up of the detection electrode 91. Secondly, the lifting seat 22, the deflection wheel 41, the synchronous belt 42 and the protrusion 214 are used to realize that when the lifting seat 22 drives the clamping seat 31 and the detection electrode 91 to rise and fall vertically, the clamping seat 31 will also perform reciprocating rotation and swing so that the detection electrode 91 can be vertically lifted and lowered while rotating and swinging, so that the detection electrode 91 can swing and rise to enter or leave the solution, and avoid the problem of the chitosan film detaching caused by the accumulation of impact force due to the small contact surface when the gel-like chitosan film is immersed in the liquid, thereby improving the accuracy of the detection data.

[0049] As another embodiment provided by the present invention, the lifting seat 22 is symmetrically rotatably provided with reduction wheels 5 located on both sides of the clamping seat 31, and a weight-bearing portion 51 is provided on the reduction wheel 5. The clamping seat 31 is in a default state so that the detection electrode 91 is vertical and the weight-bearing portion 51 is symmetrically distributed about the clamping seat 31. The reduction wheel 5 and the clamping seat 31 are synchronously rotated. The clamping seat 31 is driven to rotate so that the weight-bearing portion 51 of one reduction wheel 5 rotates close to and abuts against the clamping seat 31, and the weight-bearing portion 51 of the other reduction wheel 5 rotates close to and away from the clamping seat 31.

[0050] Specifically, Figure 6 As shown, a mounting portion 221 is provided at one end of the vertical lower end of the lifting seat 22, the clamping seat 31 is rotatably provided on the mounting portion 221, and the reduction wheel 5 is horizontally symmetrically rotatably provided on both sides of the clamping seat 31. When the clamping seat 31 is in a default state under the action of gravity so that the detection electrode 91 locked on the clamping seat 31 is in a vertical shape, the weight-bearing portion 51 on the reduction wheel 5 is symmetrically distributed, as shown in FIG. Figure 7As shown, when the lifting seat 22 is driven to descend vertically so that the deflection wheel 41 and the clamping seat 31 rotate synchronously, the clamping seat 31 rotates and swings toward the right reduction wheel 5, and the right reduction wheel 5 rotates synchronously with the clamping seat 31 so that the weight-bearing part 51 on the right reduction wheel 5 rotates and approaches the clamping seat 31, until the weight-bearing part 51 abuts against the clamping seat 31 to limit the maximum rotation and swing of the clamping seat 31, so as to limit the maximum swing amplitude of the clamping seat 31 and the detection electrode 91 by using the reduction wheel 5 and the weight-bearing part 51, so as to avoid the problem that the detection electrode 91 extends out of the cell body due to excessive swing amplitude and causes the liquid on the detection electrode 91 to drip out, and the limit of the weight-bearing part 51 can also be used to avoid the problem that the clamping seat 31 swings too much and causes the detection electrode 91 to hit the inner wall of the cell body and cause damage to the detection electrode 91;

[0051] like Figure 7 As shown, as the clamping seat 31 rotates and swings toward the right reduction wheel 5, the left reduction wheel 5 also rotates synchronously with the clamping seat 31, causing the weight-bearing portion 51 of the left reduction wheel 5 to rotate away from the clamping seat 31 and lift vertically, thereby utilizing the left reduction wheel 5 and the weight-bearing portion 51 to achieve deceleration of the clamping seat 31 during the swinging process, thereby preventing the clamping seat 31 from rotating too fast and causing the detection electrode 91 locked thereon to be damaged by inertial bending.

[0052] Furthermore, a first circle tooth portion 312 is provided on the clamping seat 31, and a second circle tooth portion 53 is provided on the reduction wheel 5. The first circle tooth portion 312 and the second circle tooth portion 53 are coupled. When the lifting seat 22 moves to the highest position or the lowest position, the interference portion 411 of the deflection wheel 41 is separated from the protrusion 214. At this time, the clamping seat 31 rotates to a default state under the action of gravity, and the detection electrode 91 on the clamping seat 31 is in a vertical shape. At this time, the existence of the reduction wheel 5 and the load-bearing portion 51 and the friction deceleration between the first circle tooth portion 312 and the second circle tooth portion 53 can reduce the speed at which the clamping seat 31 rotates back to the default state, thereby further improving the protection of the detection electrode 91 locked on the clamping seat 31.

[0053] As another embodiment provided by the present invention, it also includes a locking plate 32 with one end rotatably disposed on the clamping seat 31, and a locking groove 311 is opened on the clamping seat 31. The locking plate 32 is driven to rotate close to the clamping seat 31 and is connected to the clamping seat 31 by bolts to lock the fixing part 911 in the locking groove 311.

[0054] Specifically, a through hole is opened on the locking plate 32, and a plurality of threaded matching holes are opened on the clamping seat 31, and the fixing portion 911 of the detection electrode 91 can be placed in the locking groove 311, and then the locking plate 32 is rotated close to the clamping seat 31, and the bolt is passed through the through hole of the locking plate 32 and threadedly connected to the threaded matching hole of the clamping seat 31, thereby fixing the locking plate 32. At this time, the locking plate 32 clamps and locks the fixing portion 911 of the detection electrode 91 on the clamping seat 31 to complete the fixation of the detection electrode 91, thereby improving the fixation and movement stability of the detection electrode 91.

[0055] As another embodiment provided by the present invention, a contact plate 33 is symmetrically and slidably arranged on the clamping seat 31, and the contact plate 33 contacts the rotation and swinging direction side of the fixed part 911. A contact slope 331 is arranged on the contact plate 33. The clamping seat 31 drives the detection electrode 91 to swing so that the load-bearing part 51 of a reduction wheel 5 rotates close to and contacts the contact slope 331, and the load-bearing part 51 rotates to push the contact plate 33 to slide along the surface direction of the fixed part 911 away from the clamping seat 31. An elastic member 34 is arranged in the clamping seat 31 for driving the contact plate 33 to slide and reset.

[0056] Specifically, Fig. 9 As shown, the contact plate 33 is slidably disposed on the clamping seat 31, and the elastic member 34 drives the contact plate 33 to slide close to the axial direction of the clamping seat 31 to be in a default state, and the contact plate 33 contacts the side of the fixed portion 911 in the rotation and swinging direction. When the lifting seat 22 is vertically lifted and lowered to make the deflection wheel 41 and the clamping seat 31 rotate synchronously, the clamping seat 31 rotates to make the weight-bearing part 51 of the reduction wheel 5 on one side approach and contact the contact slope 331 of the contact plate 33. At this time, the weight-bearing part 51 contacts the contact slope 331. In order to limit the rotation of the clamping seat 31, the detection electrode 91 on the clamping seat 31 is located at the highest swinging position. At this time, the weight-bearing part 51 abuts against the abutment slope 331 to overcome the elastic potential energy of the elastic member 34 and push the abutment plate 33 to slide to a certain extent, thereby utilizing the weight-bearing part 51, the elastic member 34 and the abutment plate 33 to achieve buffering when the clamping seat 31 rotates to the limit position and stops, thereby avoiding the impact force caused by the instantaneous limit stop of the clamping seat 31 and causing damage to the detection electrode 91, thereby improving the protection of the detection electrode 91.

[0057] However, when the detection electrode 91 is located in the liquid and swings, the liquid will also flow with the detection electrode 91. When the clamping seat 31 drives the detection electrode 91 to stop at the highest swinging position, the liquid will still apply a rotational thrust to the detection electrode 91 due to the flow inertia, and the clamping seat 31 has been rotated to a limit, which can easily cause the fixed portion 911 of the detection electrode 91 to be bent and damaged. The thrust applied by the liquid flow on the detection electrode 91 will drive the clamping seat 31 to continue to rotate in the limit direction, thereby causing the weight-bearing portion 51 to further rotate toward one side of the clamping seat 31, and the weight-bearing portion 51 moves to further push the resistance slope 331 so that the resistance plate 33 slides out along the surface direction of the fixed portion 911 away from the clamping seat 31, thereby causing the resistance plate 33 to move toward the end of the detection electrode 91 toward the pool body, thereby improving the support of the resistance plate 33 to the fixed portion 911, and avoiding the bending and damage of the fixed portion 911 caused by the impact of the liquid flow inertia thrust of the detection electrode 91.

[0058] As another embodiment provided by the present invention, a fixed rod 6 is provided on the lifting seat 22, and an inner cavity 61 and an ejection hole 631 connected to the inner cavity 61 are opened on the fixed rod 6, and the ejection hole 631 is inclined vertically downward toward the clamping seat 31, and a piston column part 215 for piston movement in the inner cavity 61 is provided on the movable seat 21.

[0059] Specifically, Figure 4 As shown, the fixed rod 6 is arranged on the lifting seat 22, and the fixed rod 6 is provided with an extension part 63, and the ejection hole 631 is arranged on the extension part 63 so that the ejection hole 631 is inclined toward the clamping seat 31 vertically downward, and the piston column part 215 of the movable seat 21 is located in the inner cavity 61 to maintain piston movement. When the lifting seat 22 is driven to slide and rise vertically, the lifting seat 22 drives the clamping seat 31 and the detection electrode 91 to rise vertically and leave the pool body. At the same time, the fixed rod 6 moves vertically upward following the lifting seat 22 so that the piston column part 215 is located in the inner cavity 61 to perform piston movement. At this time, the gas in the inner cavity 61 is pressurized and ejected from the ejection hole 631 to one side of the detection electrode 91, and then the fixed rod 6 and the piston column part 215 are used to jet and clean the detection electrode 91 that rises and leaves the pool body, so that the liquid adhered to the detection electrode 91 due to the liquid tension is further blown off, avoiding the adhesion of droplets and causing errors in subsequent detection data, and further improving the accuracy of data detection.

[0060] As another embodiment provided by the present invention, the reduction wheel 5 is provided with a plurality of groups of connecting channels 52 whose openings are symmetrically distributed about the axis of the reduction wheel 5, and the ejection holes 631 are opened toward one side of the axis of the reduction wheel 5. The clamping seat 31 is driven to rotate so that the reduction wheel 5 rotates so that the plurality of connecting channels 52 are intermittently connected with the ejection holes 631 in sequence.

[0061] Specifically, Figure 8As shown, a plurality of connecting channels 52 are provided on the reduction wheel 5, and the plurality of connecting channels 52 are not connected to each other, and the two openings of a single connecting channel 52 are symmetrically distributed with respect to the axis of the reduction wheel 5, and the reduction wheel 5 is located outside the opening of the ejection hole 631. When the connecting channel 52 opens toward the ejection hole 631, the gas in the ejection hole 631 can be ejected toward the side of the detection electrode 91 along the connecting channel 52, and when the connecting channel 52 is not connected to the ejection hole 631, the ejection hole 631 is blocked by the reduction wheel 5. Therefore, when the lifting seat 22 is driven to rise vertically, the fixed rod 6 moves vertically upward with the lifting seat 22 so that the piston column 215 is located in the inner cavity 61 to perform piston movement. At this time, the gas in the inner cavity 61 is still continuously pressurized, and the lifting seat 22 is lifted and lowered so that the clamping seat 31 and the reduction wheel 5 rotate synchronously with the deflection wheel 41. Then, in the process of the clamping seat 31 driving the detection electrode 91 to swing upward, the reduction wheel 5 rotates so that a group of connecting channels 52 is connected to the ejection hole 631 and then disconnected, and the ejection hole 631 is blocked. Subsequently, another group of connecting channels 52 is connected to the ejection hole 631 and then disconnected. Then, the reduction wheel 5 and the connecting channels 52 thereon are used to realize the intermittent ejection of the gas in the inner cavity 61 along the ejection hole 631 toward the detection electrode 91, thereby increasing the ejection speed of the gas each time the ejection hole 631 is opened, and further improving the cleaning effect of the gas ejected from the ejection hole 631 on the droplets adhering to the detection electrode 91.

[0062] As another embodiment provided by the present invention, a mounting portion 62 is provided on the fixing rod 6 , and the mounting portion 62 is rotatably mounted in a mounting hole 313 coaxially opened on the clamping seat 31 .

[0063] Specifically, the mounting portion 62 of the fixed rod 6 is rotatably disposed in the mounting hole 313 of the clamping seat 31. When the lifting seat 22 is driven to move vertically upward so that the gas in the inner cavity 61 is continuously pressurized, the clamping seat 31 and the reduction wheel 5 follow the reciprocating rotation, and the reduction wheel 5 rotates to make the ejection hole 631 open and close intermittently. When the ejection hole 631 is opened, the air pressure in the fixed rod 6 is instantly reduced so that the fixed rod 6 vibrates in the length direction, and then the vibration is transmitted to the clamping seat 31 to generate vertical vibration on the clamping seat 31. The vertical vibration generated by the fixed rod 6 is used to further vibrate and remove the droplets adhered to the detection electrode 91, thereby further improving the accuracy of the detection data. In addition, the vertical vibration of the fixed rod 6 can also vertically shake the clamping seat 31, further contact and decelerate the rotational swing of the clamping seat 31, thereby reducing the swing impact force on the detection electrode 91 clamped on the clamping seat 31, and realizing buffer protection for the detection electrode 91 when it swings upward.

[0064] Working principle:

[0065] S1. First, the fixing portion 911 of the detection electrode 91 is locked and fixed on the clamping seat 31 through the locking plate 32;

[0066] S2, then the moving seat 21 moves to the vertical upper part of the sample pool 13, and the lifting seat 22 slides down vertically. At this time, the abutment portion 411 of the deflection wheel 41 is abutted by the protrusion 214 in turn, driving the clamping seat 31 to deflect, and the reduction wheel 5 deflects synchronously with the clamping seat 31, so that the detection electrode 91 reciprocates and swings while vertically descending into the sample pool 13. After the detection electrode 91 is immersed in the sample pool 13, it remains stationary and immersed for a period of time, so that the detection electrode 91 reaches equilibrium in complex adsorption of heavy metal ions;

[0067] S3, the lifting seat 22 slides vertically upward, and the abutting portion 411 of the deflection wheel 41 is abutted by the protrusion 214 in turn, driving the clamping seat 31 to deflect, so that the detection electrode 91 can be vertically lifted and leave the sample pool 13 while rotating and swinging back and forth;

[0068] S4, the movable seat 21 is horizontally moved to the vertical upper part of the cleaning tank 14. Similarly, the movable seat 21 is vertically lowered to make the detection electrode 91 rotate and swing back and forth while vertically lowering into the cleaning tank 14. The ionized water in the cleaning tank 14 cleans the surface of the detection electrode 91. Then, the movable seat 21 is vertically raised to make the detection electrode 91 rotate and swing back and forth while vertically rising to leave the cleaning tank 14.

[0069] S5. The movable seat 21 is moved horizontally to the vertical upper part of the detection cell 15. Similarly to the above, the movable seat 21 is vertically lowered to make the detection electrode 91 rotate and swing back and forth while vertically lowering into the redox medium mixed solution in the detection cell 15. Cyclic voltammetry scanning is performed using an electrochemical device, and data analysis is performed using an electroanalysis workstation to detect the concentration of heavy metal ions.

[0070] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A chitosan heavy metal ion detection device, comprising a detection electrode (91), wherein a fixing portion (911) is provided on the detection electrode (91), characterized in that: It also includes a base (1) on which is arranged: A moving assembly (2), comprising a moving seat (21) arranged to slide horizontally and a lifting seat (22) arranged to slide vertically on the moving seat (21); a clamping seat (31) is rotatably arranged on the lifting seat (22); a deflection wheel (41) is arranged in the lifting seat (22) and rotates synchronously with the clamping seat (31); the deflection wheel (41) is symmetrically provided with abutment portions (411); and protrusions (214) are arranged on the moving seat (21) in a vertically staggered manner and are located on both sides of the deflection wheel (41); The sample pool (13), the cleaning pool (14) and the detection pool (15) are sequentially distributed in a horizontal direction below the moving seat (21); The lifting seat (22) is driven to move vertically so that the abutting portion (411) moves in sequence to abut and disengage from the protruding portion (214) so ​​that the deflection wheel (41) deflects back and forth, and the clamping seat (31) follows the deflection wheel (41) to deflect back and forth so as to drive the detection electrode (91) to rotate and swing back and forth; The lifting seat (22) is symmetrically provided with reduction wheels (5) located on both sides of the clamping seat (31), and a weight portion (51) is provided on the reduction wheel (5). The clamping seat (31) is in a default state so that the detection electrode (91) is vertical and the weight portion (51) is symmetrically distributed with respect to the clamping seat (31). The reduction wheel (5) and the clamping seat (31) are synchronously rotated. The clamping seat (31) is driven to rotate so that the weight portion (51) of one reduction wheel (5) rotates close to and contacts the clamping seat (31), and the weight portion (51) of the other reduction wheel (5) rotates close to and moves away from the clamping seat (31). It also includes a locking plate (32) with one end rotatably disposed on the clamping seat (31), the clamping seat (31) being provided with a locking groove (311), the locking plate (32) being driven to rotate close to the clamping seat (31) and being connected to the clamping seat (31) by bolts so as to lock the fixing portion (911) in the locking groove (311); A contact plate (33) is symmetrically slidably arranged on the clamping seat (31), the contact plate (33) contacts the rotational swinging direction side of the fixed portion (911), and a contact slope (331) is arranged on the contact plate (33). The clamping seat (31) drives the detection electrode (91) to swing so that a load-bearing portion (51) of a reduction wheel (5) rotates close to and contacts the contact slope (331), and the load-bearing portion (51) rotates to push the contact plate (33) to slide along the surface direction of the fixed portion (911) away from the clamping seat (31), and an elastic member (34) is arranged in the clamping seat (31) for driving the contact plate (33) to slide and reset.

2. A chitosan heavy metal ion detection device according to claim 1, characterized in that: The lifting seat (22) is provided with a fixing rod (6), the fixing rod (6) is provided with an inner cavity (61) and a spray hole (631) connected to the inner cavity (61), the spray hole (631) is inclined vertically downward toward the clamping seat (31), and the movable seat (21) is provided with a piston column part (215) located in the inner cavity (61) for piston movement.

3. A chitosan heavy metal ion detection device according to claim 2, characterized in that: The reduction wheel (5) is provided with a plurality of groups of connecting channels (52) whose openings are symmetrically distributed about the axis of the reduction wheel (5); the spray holes (631) are opened toward one side of the axis of the reduction wheel (5); the clamping seat (31) is driven to rotate so that the reduction wheel (5) rotates so that the plurality of groups of connecting channels (52) are intermittently connected to the spray holes (631) in sequence.

4. A chitosan heavy metal ion detection device according to claim 3, characterized in that: The fixing rod (6) is provided with a mounting portion (62), and the mounting portion (62) is rotatably mounted in a mounting hole (313) coaxially opened in the clamping seat (31).

5. The chitosan heavy metal ion detection device according to claim 1, characterized in that: The base (1) is provided with a horizontal slideway (11) and a rotatably arranged threaded rod (12); the movable seat (21) is provided with a sliding groove (211) and a threaded hole (212); the horizontal slideway (11) is slidably matched with the sliding groove (211); and the threaded rod (12) is threadedly matched with the threaded hole (212).

6. The chitosan heavy metal ion detection device according to claim 1, characterized in that: The clamping seat (31) is provided with a first ring gear portion (312), the reduction wheel (5) is provided with a second ring gear portion (53), and the first ring gear portion (312) and the second ring gear portion (53) are coupled.

7. A chitosan heavy metal ion detection method, characterized in that: The chitosan heavy metal ion detection device comprising any one of claims 1 to 6 above, wherein the specific steps are as follows: S1. First, the fixing portion (911) of the detection electrode (91) is locked and fixed on the clamping seat (31) via a locking plate (32); S2, the moving seat (21) is then moved to the vertical upper side of the sample pool (13), and the lifting seat (22) slides down vertically. At this time, the abutment portion (411) of the deflection wheel (41) is abutted by the protrusion (214) in turn, thereby driving the clamping seat (31) to deflect, and the reduction wheel (5) deflects synchronously with the clamping seat (31), so that the detection electrode (91) is vertically descended into the sample pool (13) while rotating and swinging back and forth. After the detection electrode (91) is immersed in the sample pool (13), it remains stationary and immersed for a period of time, so that the detection electrode (91) reaches equilibrium in the complex adsorption of heavy metal ions; S3, the lifting seat (22) slides vertically upward, and the abutment portion (411) of the deflection wheel (41) is abutted by the protrusion (214) in turn, thereby driving the clamping seat (31) to deflect, so that the detection electrode (91) can be vertically lifted and removed from the sample pool (13) while rotating and swinging back and forth; S4, the movable seat (21) moves horizontally to the vertical upper part of the cleaning pool (14), and due to the presence of the deflection wheel (41) and the protrusion (214), the movable seat (21) descends vertically to make the detection electrode (91) rotate and swing back and forth while descending vertically into the cleaning pool (14), and the ionized water in the cleaning pool (14) cleans the surface of the detection electrode (91), and then the movable seat (21) rises vertically to make the detection electrode (91) rotate and swing back and forth while rising vertically to leave the cleaning pool (14); S5. The movable seat (21) is moved horizontally to the vertical upper side of the detection pool (15). Due to the presence of the deflection wheel (41) and the protrusion (214), the movable seat (21) is vertically lowered to allow the detection electrode (91) to rotate and swing back and forth while vertically lowering into the redox medium mixed solution in the detection pool (15). Cyclic voltammetry scanning is performed using an electrochemical device, and data analysis is performed using an electroanalysis workstation to detect the concentration of heavy metal ions.

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