Passive sampling device

Abstract

The utility model discloses a passive sampling device which comprises a mounting assembly and a sampling assembly, the mounting assembly comprises a supporting structure and a length adjusting assembly, and the length adjusting assembly is used for adjusting the length of the supporting structure so that the supporting structure can make contact with and be positioned on the inner wall of a drainage pipe; the sampling assembly is installed on the supporting structure and used for collecting to-be-detected substances in water in the drainage pipe. The sampling assembly is mounted on the supporting structure, and the length adjusting assembly adjusts the length of the supporting structure, so that the length of the supporting structure adapts to the inner wall of the drainage pipe to be sampled, the supporting structure can conveniently position the sampling assembly in the drainage pipe, the stability of the passive sampling device in the long-time sampling process is ensured, and the accidental influence of the sampling time is reduced; the sampling assembly is used for collecting a to-be-detected substance in a water body in the drainage pipe, and the abuse condition of the control drug in the service area of the drainage pipe can be obtained by detecting the collected to-be-detected substance.

Description

Technical Field

[0001] The present application relates to the field of water sampling, and in particular to a passive sampling device. Background Art

[0002] Sewage sample collection is generally divided into two categories: active collection and passive collection. Compared with active sampling performed manually, passive sampling technology has the advantages of easy deployment, energy saving, low cost and long placement cycle, and can also reduce the impact of randomness in sampling time.

[0003] However, the current passive sampling device is difficult to fix in the drain pipe, which is not conducive to long-term collection and monitoring of the content of controlled drugs in the sewage in a certain drain pipe. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a passive sampling device that can be fixed to a sewage pipe and is conducive to long-term sampling.

[0005] According to the passive sampling device of the first aspect embodiment of the present application, the passive sampling device includes an installation component and a sampling component, the installation component includes a support structure and a length adjustment component, the length adjustment component is used to adjust the length of the support structure so that the support structure contacts and is positioned on the inner wall of the drain pipe to be sampled; the sampling component is installed on the support structure, and the sampling component is used to collect water in the drain pipe.

[0006] The passive sampling device according to the embodiment of the present application has at least the following beneficial effects: the sampling component is installed on the supporting structure, and the length adjustment component adjusts the length of the supporting structure so that the length of the supporting structure adapts to the inner wall of the drain pipe to be sampled, which facilitates the supporting structure to position the sampling component inside the drain pipe, thereby ensuring the long-term sampling stability of the passive sampling device and reducing the impact of randomness in the sampling time; the sampling component is used to collect the substances to be tested in the water body in the drain pipe, and testing the substances to be tested collected by the sampling component can determine the abuse of controlled drugs in the service area of the drain pipe.

[0007] According to some embodiments of the present application, the support structure includes a first support component and a second support component, the first support component and the second support component are plugged into each other, the length adjustment component is arranged between the first support component and the second support component, and the sampling component is connected to the second support component.

[0008] According to some embodiments of the present application, the length adjustment component includes an internal thread and an external thread that engage with each other, and the internal thread and the external thread are arranged on the first support component and the second support component so that the first support component and the second support component can adjust the length of the support structure through a threaded connection.

[0009] According to some embodiments of the present application, the length adjustment assembly includes an elastic component, which connects the first supporting component and the second supporting component, and the elastic component is used to drive the supporting structure to adjust its length through elastic force.

[0010] According to some embodiments of the present application, the length adjustment assembly also includes a clamping component and a plurality of clamping holes, and the clamping component and the clamping holes are arranged on the first support component and the second support component, and each of the clamping holes is distributed along the axial direction of the support structure. The clamping component is used to clamp the clamping holes to limit the length of the support structure.

[0011] According to some embodiments of the present application, both the first supporting component and the second supporting component are installed with connecting components, and the connecting components are used to connect the first supporting component and the second supporting component to the inner wall of the drainage pipe to be sampled.

[0012] According to some embodiments of the present application, the sampling assembly includes a shell assembly and an adsorption component, the shell assembly includes a base and a hollow cover body, the cover body is connected to the base, the adsorption component is located between the base and the cover body, and the adsorption component is used to adsorb the substance to be tested in the water body passing through the cover body.

[0013] According to some embodiments of the present application, the sampling assembly includes a loading component, the loading component is located between the base and the cover, the loading component is provided with a slot, and the adsorption component is installed in the slot.

[0014] According to some embodiments of the present application, the sampling assembly includes a filter, which is disposed on the cover body and is used to block objects that are larger than the aperture of the filter.

[0015] According to some embodiments of the present application, the sampling assembly further includes a filter component, which is located between the base and the cover, and is used to block suspended particles in the water.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the technical solutions disclosed in this application and constitute a part of the specification. Together with the embodiments disclosed in this application, they are used to explain the technical solutions disclosed in this application and do not constitute a limitation on the technical solutions disclosed in this application.

[0018] Figure 1 This is a front view of the first embodiment of the passive sampling device according to the present application;

[0019] Figure 2 This is a side view of the first embodiment of the passive sampling device according to the present application;

[0020] Figure 3 This is a front view of the second embodiment of the passive sampling device according to the present application;

[0021] Figure 4 This is a side view of a second embodiment of the passive sampling device according to an embodiment of the present application;

[0022] Figure 5 Exploded view and perspective view of the sampling assembly in the passive sampling device according to an embodiment of the present application;

[0023] Figure 6 This is a schematic structural diagram of the loading components in the passive sampling device according to an embodiment of the present application.

[0024] Reference numerals:

[0025] First supporting member 101; second supporting member 102; positioning ring 103; connecting member 104;

[0026] Internal thread 201; elastic component 202; clamping component 203; clamping hole 204;

[0027] Sampling assembly 300; base 301; cover 302; adsorption component 303; loading component 304; slot 305; filter 306; filtering component 307. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0029] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0030] In the description of this application, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0031] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0032] In the description of this application, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0033] like Figure 1 As shown, an embodiment of the present application provides a passive sampling device, which includes a mounting assembly and a sampling assembly 300. The sampling assembly 300 is used to collect water in the drain pipe, and the sampling assembly 300 and the mounting assembly are installed as a whole. The mounting assembly can be adaptively installed on the inner wall of the drain pipe to be sampled with different inner diameters, so that the sampling assembly 300 remains inside the drain pipe, which facilitates long-term continuous sampling and reduces the impact of randomness in the sampling time. Furthermore, by detecting the composition and content concentration of the controlled drugs collected by the sampling assembly 300, the abuse of psychotropic controlled drugs in the drainage pipe service area can be known.

[0034] In some examples, the mounting assembly includes a support structure and a length adjustment assembly, wherein the length adjustment assembly is disposed on the support structure. Under the action of the length adjustment assembly, the length of the support structure can be changed so that the length of the support structure adapts to the inner wall of the drain pipe.

[0035] Furthermore, most drain pipes are formed into a cylindrical structure, and the inner wall of the drain pipe is formed into a cylindrical shape. Among them, after the length adjustment component adjusts the length of the support structure, the length of the support structure is approximately equal to the inner diameter of the drain pipe and remains at the current length. It can be understood that the maximum length of an object that can be accommodated inside the drain pipe is the inner diameter length. When the support structure is embedded in the drain pipe at this length, both ends of the support structure will contact the inner wall of the drain pipe and form a position. After the support structure is positioned, the sampling component 300 installed on the support structure is also positioned inside the drain pipe to prevent the sampling component 300 from accidentally detaching from the drain pipe, so as to facilitate the sampling component 300 to complete long-term continuous sampling work.

[0036] In some examples, the support structure includes a first support member 101 and a second support member 102, which are connected by plugging. The first support member 101 is generally formed into a rod-shaped structure, and the portion of the second support member 102 used for connecting to the first support member 101 is also generally formed into a rod-shaped structure. It will be understood that the ends of the first support member 101 and the second support member 102, away from the plug-in position, form the ends of the support structure.

[0037] Specifically, the first support member 101 is hollow, and the second support member 102 is inserted into the interior of the first support member 101. When the second support member 102 is inserted longer, the overall length of the support structure is shorter; when the second support member 102 is inserted shorter, the overall length of the support structure is longer. The length adjustment assembly can control the insertion length of the second support member 102, thereby adjusting the overall length of the support structure.

[0038] The length adjustment component is disposed between the first support component 101 and the second support component 102 , and the sampling component 300 is connected to the second support component 102 .

[0039] Furthermore, the second support component 102 is provided with a positioning ring 103, and the shape of the hollow part of the positioning ring 103 corresponds to the shape of the sampling component 300, so that the sampling component 300 can be installed in the second support component 102 in an embedded manner, so that the sampling component 300 and the support structure form a whole.

[0040] In some examples, the sampling assembly 300 is configured as an integral structure with the support structure and the positioning ring 103 thereon.

[0041] In some examples, a connecting member 104 is mounted on the end of the first support member 101 away from the second support member 102, and the first support member 101 contacts and is positioned on the inner wall of the drain pipe via the connecting member 104. Simultaneously, a connecting member 104 is also mounted on the end of the second support member 102 away from the first support member 101, and the second support member 102 contacts and is positioned on the inner wall of the drain pipe via the connecting member 104.

[0042] The positioning ring 103 is located in the middle of the second supporting component 102 , and the second supporting component 102 near the connecting component 104 is formed into a rod-shaped structure to facilitate the installation of the connecting component 104 .

[0043] Furthermore, the connecting component 104 includes a suction cup, which contacts and is positioned on the inner wall of the drain pipe in an adsorption manner. Specifically, the suction cup is made of PVC material.

[0044] like Figure 1 and Figure 2 As shown, in the first embodiment, the length adjustment assembly includes an internal thread 201 and an external thread, and the internal thread 201 and the external thread engage with each other. Since the second support member 102 is inserted into the first support member 101, the internal thread 201 is provided on the inner wall of the first support member 101, and the external thread is provided on the outer wall of the inserted portion of the second support member 102.

[0045] When the first support member 101 and the second support member 102 rotate relative to each other, the internal and external threads 201 act to adjust the overall length of the support structure to conform to the inner diameter of the drain pipe. It is understood that the threaded connection formed by the internal and external threads 201 allows the adjusted length of the support structure to be maintained at its current length, preventing loosening between the support structure and the inner wall of the drain pipe.

[0046] like Figure 3 and Figure 4 As shown, in the second embodiment, the length adjustment assembly includes an elastic component 202, which connects the first support component 101 and the second support component 102. The elastic component 202 exerts an elastic force on the first support component 101 and the second support component 102 to move away from each other, thereby increasing the overall length of the support structure. When the support structure is inside the drain pipe, the overall length of the support structure matches the inner diameter of the drain pipe under the limitation of the inner wall of the drain pipe.

[0047] The elastic component 202 is located inside the first support component 101. The elastic component 202 connects the end of the first support component 101 away from the second support component 102 on one hand, and connects the end of the inserted portion of the second support component 102 on the other hand, thereby applying elastic force to the first support component 101 and the second support component 102. Specifically, the elastic component 202 includes a spring.

[0048] In the second embodiment, the length adjustment assembly further includes a clamping component 203 and a clamping hole 204 . Since the second support component 102 is inserted into the first support component 101 , the clamping component 203 is provided on the first support component 101 , and the clamping hole 204 is provided on the second support component 102 .

[0049] Several engaging holes 204 are provided and distributed along the axial direction of the support structure. As the insertion length of the second support member 102 changes, the engaging holes 204 corresponding to the engaging members 203 also change continuously. Once the length of the support structure is adjusted, the engaging holes 204 corresponding to the engaging members 203 are determined. At this point, the engaging members 203 engage and lock into the engaging holes 204 through movement, thereby limiting the support structure to its current length and preventing further length changes within the drain pipe. It will be appreciated that when the support structure is adapted to drain pipes of different inner diameters, the engaging members 203 engage and lock into engaging holes 204 at different locations.

[0050] In addition, the clamping holes 204 need to be densely distributed, that is, the distance between adjacent clamping holes 204 is as small as possible, so that the support structure can adapt to drainage pipes of more sizes and enhance versatility.

[0051] Specifically, the engaging component 203 includes a buckle, which is rotatably connected to the first supporting component 101 and engages with or disengages from the engaging hole 204 in a rotatable manner.

[0052] It is worth noting that the length adjustment component is not limited to the threads, elastic components 202, snap-fit components 203 or snap-fit holes 204 of the first and second embodiments. The length adjustment component can adopt any mechanism that limits the relative position of the first support component 101 and the second support component 102 under different insertion lengths.

[0053] like Figure 5 As shown, in some examples, the sampling assembly 300 is installed on the second supporting component 102, and the sampling assembly 300 is used to collect the substance to be detected in the water in the drainage pipe.

[0054] The sampling assembly 300 includes a housing assembly and an adsorption component 303. The housing assembly includes a detachably connected base 301 and a cover 302. After the base 301 and the cover 302 are connected to each other, an internal accommodation space is formed. The accommodation space is used to accommodate structures such as the adsorption component 303. The adsorption component 303 is located between the base 301 and the cover 302. Specifically, the cover 302 is located on the periphery of the base 301 and is threadedly connected to the base 301.

[0055] Furthermore, the cover 302 is hollow and formed into a ring structure, and the water in the drain pipe can pass through the cover 302 along the hollow part of the cover 302 and reach the adsorption component 303. The adsorption component 303 continuously adsorbs the substance to be tested in the water, thereby completing the water sampling process.

[0056] like Figure 6 As shown, in some examples, the sampling assembly 300 includes a loading component 304 , which is used to carry the adsorption component 303 . The loading component 304 is located in the accommodating space, that is, between the base 301 and the cover 302 .

[0057] The loading component 304 is provided with a slot 305 into which the adsorption component 303 is inserted, thereby ensuring the stable position of the adsorption component 303. The adsorption component 303 is replaceable, ensuring the continuous use of the passive sampling device. Specifically, the adsorption component 303 includes an adsorption membrane such as HLB membrane or XAD membrane.

[0058] Additionally, depending on different sampling requirements, the loading component 304 can be equipped with only a single adsorption component 303 or multiple adsorption components 303. It is understood that when the loading component 304 is equipped with only a single adsorption component 303, the loading component 304 has a slot 305 for inserting the adsorption component 303; when the loading component 304 is equipped with multiple adsorption components 303, the loading component 304 has multiple slots 305, thereby enabling multi-channel parallel sample collection. Alternatively, the loading component 304 and the adsorption component 303 can be configured as an integrated structure, and the adsorption component 303 can be replaced by replacing the integrated structure.

[0059] like Figure 5 As shown, in some examples, the sampling assembly 300 includes a filter component 307, which is located between the base 301 and the cover 302 for easy replacement. The filter component 307 is used to block suspended particles in the water. At the same time, the filter component 307 is also used to protect the adsorption component 303.

[0060] Specifically, the filter component 307 includes a filter membrane, which needs to meet the requirements of not adsorbing the target and having high strength. Materials that do not adsorb the target, such as PTFE polytetrafluoroethylene and PES polyethersulfone, can be selected. The pore size of the filter membrane is preferably 1-2 μm.

[0061] In some examples, the sampling assembly 300 further includes a filter 306 disposed on the cover 302. The filter 306 has numerous meshes and is used to block large particles in the water that are larger than the mesh size. The filter 306 also protects the adsorption component 303 and the filter component 307.

[0062] Specifically, the filter 306 is made of nylon plastic material, and the pore size of the filter 306 is preferably 2-3 mm. The filter 306 can exist independently between the base 301 and the cover 302, or the cover 302 and the filter 306 can be set as an integrated structure.

[0063] The loading component 304 and the adsorption component 303 are located close to the base 301 , the filter 306 is located close to the cover 302 , and the filter component 307 is located between the loading component 304 and the filter 306 .

[0064] During the actual implementation process, before sampling, the loading component 304 is placed on the base 301, and then the adsorption component 303 is embedded in the slot 305 of the loading component 304, and the filter component 307 and the filter screen 306 are placed in sequence, and then the cover body 302 is installed to fix the adsorption component 303 and other structures to complete the assembly of the sampling component 300.

[0065] The sampling assembly 300 is mounted on the support structure to form an integrated passive sampling device. The length of the support structure is adjusted using the length adjustment assembly to adapt it to the inner wall of the drainpipe to be sampled. The passive sampling device is then secured near the drainpipe outlet via the connecting component 104. When water discharged from the drainpipe passes through the passive sampling device, it passes through the hollow portion of the cover 302, where the controlled drugs are irreversibly absorbed into the adsorption component 303, achieving continuous sampling.

[0066] After sampling is completed, the passive sampling device is taken out, the surface is cleaned with pure water, and the adsorption component 303 in the device is taken out. Through sample pretreatment and instrument analysis, the composition and concentration of the controlled drugs adsorbed on the adsorption component 303 can be known, thereby knowing whether there is abuse of controlled drugs in the service area of the drain pipe.

[0067] In some optional embodiments, the functions / operations mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the functions / operations involved, the two boxes shown in succession may actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiments presented and described in the flow chart of the present application are provided in an exemplary manner for the purpose of providing a more comprehensive understanding of the technology. The disclosed method is not limited to the operations and logic flows presented herein. Optional embodiments are contemplated in which the order of the various operations is changed and the sub-operations described as a part of a larger operation are performed independently.

[0068] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. A passive sampling device, characterized in that: include: An installation assembly, the installation assembly comprising a support structure and a length adjustment assembly, the length adjustment assembly being used to adjust the length of the support structure so that the support structure contacts and is positioned on the inner wall of the drainage pipe to be sampled; A sampling assembly is installed on the supporting structure and is used to collect water in the drainage pipe.

2. The passive sampling device according to claim 1, characterized in that The supporting structure includes a first supporting component and a second supporting component, the first supporting component and the second supporting component are plugged into each other, the length adjustment component is arranged between the first supporting component and the second supporting component, and the sampling component is connected to the second supporting component.

3. The passive sampling device according to claim 2, characterized in that: The length adjustment assembly includes an internal thread and an external thread that mesh with each other. The internal thread and the external thread are provided on the first support component and the second support component so that the first support component and the second support component can adjust the length of the support structure through threaded connection.

4. The passive sampling device according to claim 2, characterized in that: The length adjustment assembly includes an elastic component, which connects the first supporting component and the second supporting component. The elastic component is used to drive the supporting structure to adjust its length through elastic force.

5. The passive sampling device according to claim 4, characterized in that: The length adjustment assembly also includes a clamping component and a plurality of clamping holes, which are arranged on the first support component and the second support component. Each of the clamping holes is distributed along the axial direction of the support structure. The clamping component is used to clamp the clamping holes to limit the length of the support structure.

6. The passive sampling device according to claim 2, characterized in that: The first supporting component and the second supporting component are both installed with connecting components, and the connecting components are used to connect the first supporting component and the second supporting component to the inner wall of the drainage pipe to be sampled.

7. The passive sampling device according to claim 1, characterized in that: The sampling assembly includes a shell assembly and an adsorption component. The shell assembly includes a base and a hollow cover. The cover is connected to the base. The adsorption component is located between the base and the cover. The adsorption component is used to adsorb the substance to be tested in the water body passing through the cover.

8. The passive sampling device according to claim 7, characterized in that: The sampling assembly includes a loading component, the loading component is located between the base and the cover, the loading component is provided with a slot, and the adsorption component is installed in the slot.

9. The passive sampling device according to claim 8, characterized in that: The sampling assembly includes a filter screen, which is arranged on the cover body and is used to block objects that are larger than the aperture of the filter screen.

10. The passive sampling device according to claim 8, characterized in that: The sampling assembly further includes a filter component, which is located between the base and the cover and is used to block suspended particles in the water.

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