Underwater sampling device for thin film diffusion gradient technology

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By designing the cage and adjustable bottom support structure in film diffusion gradient technology, the problem of insufficient sampler instability and detection accuracy is solved, the balanced positioning and height adjustment of the underwater sampling device is realized, and the detection accuracy is improved And filter the floating objects to ensure the effectiveness of the sampler.

CN222353576UActive Publication Date: 2025-01-14SHENYANG URBAN CONSTR COLLEGE

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Patent Information

Application Number: CN202420249808.2
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-01-31
Publication Date: 2025-01-14
Estimated Expiration: 2034-01-31

AI Technical Summary

Technical Problem

The existing thin film diffusion gradient technology has problems with sampler instability and insufficient detection accuracy during underwater sampling, especially in the environment of sampling components at different heights.

Method used

An underwater sampling device including a cage, a central column, a sampling assembly fixed frame and an adjustable bottom bracket is designed. The positioning and height adjustment of the sampling assembly is achieved through the combined structure of the fixing frame and the bottom bracket to ensure balance of the sampler and To prevent external solutions from entering the gap, use a multi-layer mesh grate to filter the floating object, and connect the fixing seat and the pressing plate through bolt reinforcement to closely combine with the diffusion layer.

Benefits of technology

The balanced positioning and height adjustment of the sampler are realized, the accuracy and stability of the detection are improved, the external solution is avoided affecting the accuracy of the detection results, and the floating objects are filtered through a multi-layer mesh grate, ensuring the effectiveness of the sampler.

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Abstract

The utility model discloses an underwater sampling device adopting a thin film diffusion gradient technology, which comprises a net cage, a plurality of sampling component fixing frames are arranged on a central column at the bottom of the net cage, are arranged along the radial direction of the central column, and are uniformly distributed in the net cage in a circumferential manner; the sampling assembly fixing frame comprises a fixing frame base and a bottom support, a sampling assembly fixing hole is formed in the fixing frame base, and a sampling assembly is arranged in the sampling assembly fixing hole. All the sampling assemblies are located on the same horizontal plane, all the sampling assemblies are fixed by the sampling assembly fixing frame, and all the samplers are fixed by the sampling assemblies, so that all the samplers can be used for extracting objects to be detected in an external solution in a balanced manner, and the detection balance sampling accuracy is ensured.

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Description

Technical Field

[0001] The utility model belongs to the field of detection devices and relates to a sampling device, in particular to an underwater sampling device using a thin film diffusion gradient technology. Background Art

[0002] The thin film diffusion gradient technique (DGT) was successfully developed by Davison W and Zhang H in 1994. It enriches the analyte in water through the DGT sampler. The DGT sampler is equipped with a binding phase, and a diffusion layer is provided above the sampling window of the DGT sampler. When the DGT device is placed in a solution containing the analyte, the analyte in the solution diffuses through the diffusion layer, and the analyte passing through the diffusion layer is quickly bound by the binding phase inside the DGT device. The concentration of the analyte at the junction of the diffusion layer and the binding phase is reduced to the minimum. At this time, there is a concentration gradient related to the analyte on both sides of the diffusion layer. When the concentration of the analyte in the solution is almost unchanged and the enrichment capacity of the binding phase has not reached saturation, the concentration gradient on both sides of the diffusion layer remains unchanged, the diffusion rate of the analyte is constant, and the diffusion flux of the analyte through the diffusion layer conforms to Fick's diffusion law. The concentration of the analyte in the bulk solution can be calculated based on the enrichment amount and enrichment time of the analyte by the DGT device.

[0003] In order to ensure the accuracy of enrichment sampling, the balanced multi-point sampling method is often used, and then the average value is calculated. The balanced multi-point sampling method requires that each sampler is in a state of balanced and stable enrichment. Utility Model Content

[0004] The utility model aims to provide an underwater sampling device of thin film diffusion gradient technology to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an underwater sampling device of thin film diffusion gradient technology, characterized in that it includes a net cage, a central column is provided at the center of the bottom of the net cage, a plurality of sampling component fixing racks are provided on the central column, the sampling component fixing racks are radially arranged along the central column, and the plurality of sampling component fixing racks are evenly distributed in a circle inside the net cage, one end of the sampling component fixing rack is fixed to the central column, and the other end is fixed to the net cage, the sampling component fixing rack includes a fixing rack base and a bottom support, a sampling component fixing hole is provided on the fixing rack base, the sampler positioning hole has no bottom, and a sampling window is provided on the top of the sampler positioning hole, and a sampling component is provided in the sampling component fixing hole.

[0006] Furthermore, a positioning groove is provided on the outer side of the base of the fixed frame, and the positioning groove is a hemispherical recessed hole, and a plurality of positioning grooves are vertically arranged from top to bottom; the base support includes a platform and a base slot, and base slots are provided on both sides of the platform, and the two side walls of the fixed frame base cooperate with the base slots, and a pressable top column is provided on the outer groove wall of the base slot, and the pressable top column corresponds to the positioning groove.

[0007] Furthermore, the pressable ejector column includes an ejector pin and a compression spring. The ejector pin is located in the hole cavity of the outer groove wall. A spherical end is provided at the inner end of the ejector pin, and a stop ring is provided at the outer end of the ejector pin. The stop ring abuts against a convex ring in the upper hole cavity. A compression spring is sleeved on the ejector pin between the convex ring and the spherical top.

[0008] Furthermore, the sampling assembly includes a fixed seat, a sampler, and a pressure plate. The fixed seat is provided with a plurality of sampler positioning holes. The sampler positioning holes are bottomless and have a sampling window on the top. The sampling window is provided with an inner edge. The sampler is a cylindrical tube with an open top and a closed bottom. The sampler cooperates with the sampler positioning holes. The opening on the top of the sampler is consistent with the opening diameter of the sampling window. A pressure plate is provided at the bottom of the fixed seat, and the pressure plate and the fixed seat are reinforced and connected by bolts.

[0009] Furthermore, multiple layers of mesh grates are arranged inside the mesh box.

[0010] Furthermore, a fixing pile is provided at the bottom of the net box, and a sharp tooth is provided at the bottom end of the fixing pile.

[0011] Technical effects and advantages of the utility model:

[0012] (1) The utility model has a central column at the bottom center of the net box, and a plurality of sampling component fixing racks are arranged on the central column. The sampling component fixing racks are used to position and fix the sampling components. Each sampling component is on the same horizontal plane. Each sampling component is fixed by the sampling component fixing rack. Each sampler is fixed by the sampling component. Therefore, each sampler can extract the analyte in the external solution in a balanced manner, thereby ensuring the accuracy of the balanced sampling detection.

[0013] (2) The base support includes a platform and a base slot. The platform is provided with base slots on both sides, and the two side walls of the fixed frame base cooperate with the base slots. A pressable top column is provided on the inner side of the outer groove wall of the base slot, and the pressable top column corresponds to the positioning groove. By selecting positioning grooves of different heights through the pressable top column, the lifting height of the platform of the base support in the fixed frame base can be adjusted, so as to be suitable for sampling components of different heights. A pressable top column is provided on the inner side of the outer groove wall of the base slot, and two pressable top columns are arranged opposite to each other. The two pressable top columns relatively clamp the positioning grooves on both sides of the fixed frame base, and the base support is firmly fixed.

[0014] (3) The spherical end of the ejector column can be pressed against the upper hemispherical positioning groove. When the bottom bracket is pushed, the groove wall of the positioning groove squeezes the spherical end, the ejector pin is squeezed, and the ejector pin enters the hole cavity. At this time, the height of the bottom bracket can be adjusted by pushing, and the height adjustment of the bottom bracket is convenient.

[0015] (4) A pressure plate is provided at the bottom of the fixing seat, and the pressure plate and the fixing seat are locked by bolts and nuts, so that the pressure plate is pressed against the fixing seat. When the pressure plate presses the sampler, the top of the opening on the sampler presses the diffusion layer, so that the diffusion layer is tightly combined with the inner edge of the sampling window, thereby preventing the analyte in the external solution from entering the sampler through its gap, thereby affecting the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of an underwater sampling device using a thin film diffusion gradient technology according to the utility model;

[0017] Figure 2 A top view of an underwater sampling device using a thin film diffusion gradient technology according to the utility model;

[0018] Figure 3 This is a structural diagram of the docking of the base support and the base of the fixed frame of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the pressable top column of the utility model;

[0020] Figure 5 This is a front view of the base of the fixed frame of the utility model;

[0021] Figure 6 This is a front view of the sampling assembly of the utility model;

[0022] Figure 7 It is a top view of the sampling assembly of the utility model;

[0023] In the figure: net box-1, central column-11, mesh grate-12, fixed pile-13, sampling component fixing frame-2, fixing frame base-21, sampling component fixing hole-211, positioning groove-212, bottom support-22, platform-221, base slot-222, convex ring-2221, pressable top column-23, ejector pin-231, spherical top-2311, stop ring-2312, compression spring-232, sampling component-3, fixing seat-31, sampler-32, pressure plate-33, sampling window-34, inner edge-341, bolt-35. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] An underwater sampling device using thin film diffusion gradient technology. For its specific structure, please refer to the attached manual. Figure 1 , Figure 2 As shown, it includes a mesh box 1. Each side of the mesh box 1 in this specific embodiment is a mesh plate, which is used to filter floating objects in the water to prevent the floating objects from adhering to the surface of the sampling component and affecting the diffusion and enrichment of the extract in the sampler. Figure 1 , Figure 2 As shown, a central column 11 is provided at the bottom center of the net box 1, and a plurality of sampling component fixing racks 2 are provided on the central column 11. The sampling component fixing racks 2 are used to position and fix the sampling component 3. The sampling component fixing racks 2 are radially arranged along the central column 11, and a plurality of sampling component fixing racks 2 are evenly distributed in a circumference inside the net box 1. The arrangement of the sampling component fixing racks 2 helps each sampler to achieve balanced multi-point sampling. One end of the sampling component fixing rack 2 is fixed to the central column 11, and the other end is fixed to the net box 1. The sampling component fixing rack 2 includes a fixing rack base 21 and a bottom bracket 22. The fixing rack base 21 is provided with a sampling component fixing hole 211, and the bottom of the fixing rack base 21 is provided with a bottom bracket 22. The sampling component fixing hole 211 is provided with a sampling component 3. The sampling assembly 3 is disposed in the sampling assembly fixing hole 211 , and the bottom support 22 plays a role of lifting the sampling assembly 3 , which helps the samplers in the entire sampling assembly 3 to be on the same horizontal plane.

[0026] In this specific embodiment, the sampling components are on the same horizontal plane, and each sampling component is fixed by the sampling component fixing frame 2, and each sampler is fixed by the sampling component, so each sampler can extract the test object in a balanced manner to ensure the accuracy of the detection sampling.

[0027] The top of each sampler in the sampling assembly 3 needs to be higher than the top of the fixed frame base 21, and the sampling window of the sampler is exposed from the top of the fixed frame base 21, or the top of the sampler is flush with the top of the fixed frame base 21. For sampling assemblies 3 of different heights, it is necessary to be able to adjust the height of the base 22. The following technical solution is adopted. See the attached manual for details. Figure 3 As shown: the outer side of the fixed frame base 21 is provided with a positioning groove 212, see the appendix of the specification Figure 5As shown, the positioning groove 212 is a hemispherical concave hole, and a plurality of positioning grooves 212 are vertically arranged from top to bottom. The bottom bracket 22 includes a platform 221 and a base slot 222. The base slots 222 are arranged on both sides of the platform 221, and the two side walls of the fixed frame base 21 cooperate with the base slots 222. A pressable top column 23 is arranged on the inner side of the outer groove wall of the base slot 222, and the pressable top column 23 corresponds to the positioning groove 212. By selecting positioning grooves 212 of different heights by the pressable top column 23, the lifting height of the platform 221 of the bottom bracket 22 in the fixed frame base 21 can be adjusted, so as to be suitable for sampling components 3 of different heights. A pressable top column 23 is arranged on the inner side of the outer groove wall of the base slot 222, and two pressable top columns 23 are arranged oppositely. The two pressable top columns 23 relatively clamp the positioning grooves 212 on both sides of the fixed frame base 21, and the bottom bracket 22 is firmly fixed.

[0028] See the instruction manual Figure 4 As shown, the pushable ejector column 23 includes an ejector pin 231 and a compression spring 232. The ejector pin 231 is located in the hole of the outer groove wall. The inner end of the ejector pin 231 is provided with a spherical end 2311, and the outer end of the ejector pin 231 is provided with a stop ring 2312. The stop ring 2312 abuts against the convex ring 2221 in the upper hole. The ejector pin between the convex ring 2221 and the spherical top 2311 is sleeved with a compression spring 232. The spherical end 2311 abuts against the upper hemispherical positioning groove 212. When the bottom bracket 22 is pushed, the groove wall of the positioning groove 212 squeezes the spherical end 2311, the ejector pin 231 is squeezed, and the ejector pin 231 enters the hole. At this time, the height of the bottom bracket 22 can be pushed and adjusted, and the height adjustment of the bottom bracket 22 is convenient.

[0029] See the instruction manual Figure 6 and Figure 7 As shown, the sampling assembly 3 includes a fixing seat 31, a sampler 32, and a pressure plate 33. The fixing seat 31 is provided with a plurality of sampler positioning holes, the sampler positioning holes are bottomless, and a sampling window 34 is provided at the top of the sampler positioning hole, and an inner edge 341 is provided at the sampling window 34. The sampler 32 is a cylindrical tube with an open top and a closed bottom. The sampler 32 cooperates with the sampler positioning hole, and the opening at the top of the sampler 32 is consistent with the opening diameter of the sampling window 34. A pressure plate 33 is provided at the bottom of the fixing seat 31, and the pressure plate 33 is reinforced and connected to the fixing seat 31 by bolts 35.

[0030] The assembly steps of the sampling assembly described in this specific embodiment are:

[0031] (1) Disassemble the sampling assembly 3, fill the five samplers 32 with the binding phase, lay the diffusion layer flat above the opening of the sampler 32, and then put the fixing seat 31 from top to bottom onto the outside of the sampler 32. The sampler 32 is inserted into the corresponding positioning hole of the sampler. Under the pressure of the inner edge 341 and the sampler 32, the diffusion layer is fixed, and the external solution will not leak in from the joint and pressure of the diffusion layer and the inner edge 341. The external solution can only diffuse through the sampling window 34 and combine with the binding phase inside the sampler.

[0032] (2) The pressing plate 33 is pressed onto the bottom of the fixing seat 31, and then the bolt 35 is inserted and the nut is screwed onto the bolt 35, thereby pressing the pressing plate 33 against the fixing seat 31. When the pressing plate 33 presses the sampler 32, the top of the opening on the sampler 32 presses the diffusion layer, thereby tightly combining the diffusion layer with the inner edge 341 of the sampling window 34, so as to prevent the analyte in the external solution from entering the sampler through its gap, thereby affecting the accuracy of the detection.

[0033] See the instruction manual Figure 1 As shown, the net box 1 is provided with a multi-layer net grate 12 inside, and the multi-layer net grate 12 has a filtering effect on floating objects in the external solution.

[0034] See the instruction manual Figure 1 As shown, the bottom of the cage 1 is provided with a fixing pile 13, and the bottom of the fixing pile 13 is provided with sharp teeth. When used in outdoor rivers or ponds, the entire underwater sampling device can be fixed by the fixing pile 13 to prevent the underwater sampling device from tipping over and causing inaccurate sampling.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An underwater sampling device using thin film diffusion gradient technology, characterized in that: It includes a net box, a central column is provided at the center of the bottom of the net box, a plurality of sampling component fixing racks are provided on the central column, the sampling component fixing racks are radially arranged along the central column, the plurality of sampling component fixing racks are evenly distributed in a circle inside the net box, one end of the sampling component fixing rack is fixed to the central column, and the other end is fixed to the net box, the sampling component fixing rack includes a fixing rack base and a bottom support, a sampling component fixing hole is provided on the fixing rack base, the sampler positioning hole has no bottom, and a sampling window is provided on the top of the sampler positioning hole, and a sampling component is provided in the sampling component fixing hole.

2. The underwater sampling device of thin film diffusion gradient technology according to claim 1 is characterized in that: A positioning groove is provided on the outer side of the base of the fixed frame, and the positioning groove is a hemispherical recessed hole, and a plurality of positioning grooves are vertically arranged from top to bottom; the base bracket includes a platform and a base slot, and base slots are provided on both sides of the platform, and the two side walls of the fixed frame base cooperate with the base slots, and a pressable top column is provided on the outer groove wall of the base slot, and the pressable top column corresponds to the positioning groove.

3. The underwater sampling device of thin film diffusion gradient technology according to claim 2 is characterized in that: The pushable ejector column includes an ejector pin and a compression spring. The ejector pin is located in the hole cavity of the outer groove wall. A spherical end is provided at the inner end of the ejector pin, and a stop ring is provided at the outer end of the ejector pin. The stop ring abuts against a convex ring in the upper hole cavity. A compression spring is sleeved on the ejector pin between the convex ring and the spherical top end.

4. The underwater sampling device of thin film diffusion gradient technology according to claim 1 is characterized in that: The sampling assembly includes a fixing seat, a sampler, and a pressure plate. The fixing seat is provided with a plurality of sampler positioning holes. The sampler positioning holes are bottomless and have a sampling window on the top. The sampling window is provided with an inner edge. The sampler is a cylindrical tube with an open top and a closed bottom. The sampler cooperates with the sampler positioning holes. The opening on the top of the sampler is consistent with the opening diameter of the sampling window. A pressure plate is provided at the bottom of the fixing seat, and the pressure plate and the fixing seat are reinforced and connected by bolts.

5. The underwater sampling device of thin film diffusion gradient technology according to claim 1 is characterized in that: The net box is internally provided with multi-layer net grates.

6. The underwater sampling device of thin film diffusion gradient technology according to claim 1, characterized in that: A fixing pile is provided at the bottom of the net box, and sharp teeth are provided at the bottom end of the fixing pile.