An observable filter-sedimentation device for detecting parasites in aquatic products

Abstract

The utility model discloses a kind of observable filter-sedimentation devices for detecting parasitic in aquatic products, it is related to aquatic product detection technical field, including observation cup, auxiliary observation seat and at least two filter components;The observation cup is placed in the inside of the auxiliary observation seat, and at least two the filter components can be detachably connected head and tail.This utility model adopts multistage filter component that can be connected in series, can intercept different size's tissue residue in turn, effectively prevent jam, and target parasitic is efficiently collected in observation cup, and sample pretreatment efficiency is greatly improved;And through valve control can be stable and exhaust supernatant and perfectly retain cup bottom precipitate, completely solve the parasitic loss problem caused by traditional pouring method, greatly improve detection accuracy and reliability.And transparent observation cup is combined with built-in LED light source and replaceable background pad, can directly carry out in situ microscopy, saves sample transfer step, avoids cross contamination, simplifies operation process, significantly improves detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of aquatic product testing technology, and in particular to an observable sedimentation device for detecting parasites in aquatic products. Background Technology

[0002] Aquatic products, especially freshwater fish, are susceptible to infection by various parasites such as liver flukes, lung flukes, and angiostrongylus cantonensis. Consuming undercooked aquatic products containing parasites can seriously endanger human health. Therefore, parasite testing of aquatic products is a crucial aspect of food safety supervision.

[0003] Currently, commonly used laboratory testing methods, such as tissue homogenization and digestion methods and direct microscopic examination, typically require homogenizing the sample tissue into a paste, followed by multiple filtration, sedimentation, and water changes before finally examining the bottom sediment under a microscope. These procedures have the following drawbacks:

[0004] 1. The process is cumbersome, requiring the use of various instruments such as beakers, funnels, gauze, and sieves, and sample loss or cross-contamination is easily caused during the transfer process;

[0005] 2. The sediment is difficult to collect, and when pouring the supernatant, it is very easy to throw away light parasites along with it, leading to missed detection;

[0006] 3. Inconvenient to observe, as the precipitate needs to be transferred to a petri dish before it can be observed under a stereomicroscope, which is time-consuming and labor-intensive, resulting in low detection efficiency;

[0007] Therefore, in order to solve the aforementioned problems, we propose an observable sedimentation device for detecting parasites in aquatic products. Utility Model Content

[0008] The purpose of this invention is to address the deficiencies in the existing technology by proposing an observable filter sedimentation device for detecting parasites in aquatic products.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] An observable sedimentation device for detecting parasites in aquatic products includes an observation cup, an auxiliary observation seat, and at least two filter components;

[0011] The observation cup is placed inside the auxiliary observation seat. At least two of the filter components are detachably connected end to end, and at least two of the filter components are detachably installed on the top of the observation cup. The observation cup is a transparent structure.

[0012] A drain pipe is fixedly installed on the lower side of one side of the observation cup, and a valve is fixedly installed inside the drain pipe.

[0013] Furthermore, the filter assembly consists of a filter screen, an upper ring, and a lower ring. The upper ring is fixedly installed at the top of the lower ring. The outer diameter of the lower ring is slightly smaller than the inner diameter of the upper ring and the inner diameter of the observation cup. The outer side of the lower ring is provided with an external thread, and the inner side of the upper ring is provided with an internal thread above the inner side of the observation cup. The external thread is adapted to the internal thread.

[0014] Furthermore, a support ring is fixedly installed on the inner side of the lower ring, and the filter screen is placed on top of the support ring. The filter screen is adapted to the lower ring, and the mesh size of the filter screen inside at least two end-to-end connected filter assemblies decreases sequentially from top to bottom.

[0015] Furthermore, the outer surface of the upper ring is provided with anti-slip texture.

[0016] Furthermore, a background pad is placed at the bottom of the inner side of the auxiliary observation seat. The background pad is black or white and made of opaque material. An LED light strip is fixedly embedded in the inner side wall of the auxiliary observation seat.

[0017] Furthermore, a groove is provided on one side of the auxiliary observation seat, and the groove is adapted to the drain pipe.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention employs a series-connected multi-stage filtration assembly, which can sequentially intercept tissue residues of different sizes, effectively preventing blockage and efficiently collecting target parasites in the observation cup, thus significantly improving sample pretreatment efficiency.

[0020] Furthermore, the valve control allows for the smooth drainage of the supernatant while perfectly preserving the sediment at the bottom of the cup, completely solving the problem of parasite loss caused by the traditional pouring method and greatly improving the accuracy and reliability of the detection.

[0021] Furthermore, the transparent observation cup, combined with a built-in LED light source and a replaceable background pad, allows for direct in-situ microscopic examination, eliminating the need for sample transfer, avoiding cross-contamination, simplifying the operation process, and significantly improving detection efficiency. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is an exploded view of the present invention;

[0025] Figure 3 This is a partial structural schematic diagram of the filter assembly of this utility model;

[0026] Figure 4 This is a perspective view of the auxiliary observation seat of this utility model.

[0027] In the diagram: 1. Observation cup; 2. Auxiliary observation seat; 3. Filter assembly; 4. Drain pipe; 5. Valve; 6. Filter screen; 7. Upper ring; 8. Lower ring; 9. Support ring; 10. LED light strip; 11. Background gasket; 12. Groove. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;

[0029] Reference Figure 1-4 An observable sedimentation device for detecting parasites in aquatic products includes an observation cup 1, an auxiliary observation seat 2, and at least two filter components 3;

[0030] The observation cup 1 is placed inside the auxiliary observation seat 2. At least two filter components 3 are detachably connected end to end and detachably installed on the top of the observation cup 1. The observation cup 1 is transparent. The cup wall of the observation cup 1 is provided with scale lines to indicate the liquid volume.

[0031] A drain pipe 4 is fixedly installed on the lower side of one side of the observation cup 1, and a valve 5 is fixedly installed inside the drain pipe 4; the outlet of the drain pipe 4 is detachably connected to a hose for directing wastewater to a designated container.

[0032] The drain pipe 4 is located on the lower side rather than at the very bottom of the cup, with its inlet slightly higher than the bottom surface of the cup. This ensures that a thin layer of liquid is always retained at the bottom of the cup during drainage, perfectly submerging the sediment and completely avoiding the risk of carrying away light parasites due to interfacial tension when pouring out the last bit of supernatant. By precisely controlling the opening of valve 5, extremely slow and smooth drainage can be achieved, further preventing liquid flow disturbance from causing the sediment to resuspend or be washed away.

[0033] The filter assembly 3 consists of a filter screen 6, an upper ring 7, and a lower ring 8. The upper ring 7 is fixedly installed at the top of the lower ring 8. The outer diameter of the lower ring 8 is slightly smaller than the inner diameter of the upper ring 7 and the inner diameter of the observation cup 1. The outer side of the lower ring 8 is provided with external threads, and the inner side of the upper ring 7 and the upper side of the inner side of the observation cup 1 are provided with internal threads, which are compatible with the external threads. The inner side of the lower ring 8 is fixedly installed with a support ring 9. The filter screen 6 is placed on top of the support ring 9 and is compatible with the lower ring 8. The mesh size of the filter screen 6 inside at least two end-to-end connected filter assemblies 3 decreases from top to bottom. The filter screen 6 is made of stainless steel mesh or nylon mesh.

[0034] The filter assembly 3 adopts a standardized threaded interface, which not only enables connection with the observation cup 1, but also allows for infinite series connection between components. Users can freely combine different pore sizes and numbers of filter screens according to the size range of parasites that may be carried by different samples such as fish, shellfish, and shrimp, to achieve customized graded filtration and flexibly meet various testing needs.

[0035] The outer surface of the upper ring 7 is provided with anti-slip texture. The anti-slip texture increases the friction when manually tightening or disassembling the filter assembly 3, allowing for smooth operation even when wearing gloves or with wet hands, thus improving operational safety and convenience.

[0036] A background pad 11 is placed at the bottom inside the auxiliary observation seat 2. The background pad 11 is black or white and made of opaque material. An LED light strip 10 is fixedly embedded in the side wall inside the auxiliary observation seat 2.

[0037] A groove 12 is provided on one side of the auxiliary observation seat 2, and the groove 12 is adapted to the drain pipe 4.

[0038] Working principle:

[0039] First, based on the size of the parasites that may be present in the sample to be tested, select a filter screen 6 with an appropriate pore size series, and assemble multiple filter components 3 into a multi-stage filter component by connecting them end to end with threads in the order of decreasing mesh size from top to bottom.

[0040] Then, the assembled multi-stage filter assembly is screwed onto the internal thread at the top of the observation cup 1 through the external thread on the lower ring 8 of the bottom filter assembly 3, and the observation cup 1 is placed smoothly into the auxiliary observation seat 2, ensuring that the drain pipe 4 is aligned and embedded in the groove 12. Before placing the observation cup 1, a black or white background pad 11 can be placed at the bottom of the seat as needed.

[0041] Next, the crushed and partially digested aquatic product sample slurry can be poured into the top filter assembly 3. Water is added and the mixture is stirred. Smaller insects and eggs will pass through the various filter screens 6 with the liquid. This multi-stage filtration design intercepts tissue residues of different sizes at each stage, while collecting the finest particles most likely to contain parasites into the bottom observation cup 1, avoiding the clogging and inefficiency problems of single-stage filtration. During the filtration process, the filter screens can be rinsed multiple times with water to ensure that all filterable material is flushed into the observation cup 1.

[0042] After filtration is complete, remove the top multi-stage filter assembly, which can be unscrewed as a whole. At this point, observe the mixture in cup 1, which may contain parasites. Let the mixture stand for a period of time, allowing the fine particles and parasites in the cup to settle naturally to the bottom under gravity.

[0043] After settling, slowly open valve 5 on drain pipe 4 and carefully drain the supernatant from the cup.

[0044] Because the drain pipe is located on the lower side, the drainage process is carried out without disturbing the sediment at the bottom of the cup. By controlling the valve opening, only the liquid can be drained very precisely, while the light parasites are kept intact at the bottom of the cup, completely solving the problem of parasite loss caused by traditional pouring methods.

[0045] After draining, the bottom of the cup contains the concentrated precipitate, which includes the target parasite. There is no need to transfer the precipitate to a petri dish at this point. Simply keep the observation cup 1 in the auxiliary observation stand 2, turn on the LED light strip 10 to provide bottom and side illumination, and allow light to pass through the transparent cup walls and bottom evenly. The black or white background pad 11 provides a high-contrast background, making the usually lighter-colored parasites easier to spot. When microscopic observation is required, the observation cup 1 can be directly removed and placed under a stereomicroscope for in-situ observation and detection of the precipitate through the bottom or walls of the cup.

Claims

1. An observable sedimentation device for detecting parasites in aquatic products, characterized in that, It includes an observation cup (1), an auxiliary observation seat (2), and at least two filter components (3); The observation cup (1) is placed inside the auxiliary observation seat (2), at least two filter components (3) are detachably connected end to end, at least two filter components (3) are detachably installed on the top of the observation cup (1), and the observation cup (1) is a transparent structure; A drain pipe (4) is fixedly installed on the lower side of one side of the observation cup (1), and a valve (5) is fixedly installed inside the drain pipe (4).

2. The observable sedimentation device for detecting parasites in aquatic products according to claim 1, characterized in that, The filter assembly (3) consists of a filter screen (6), an upper ring (7), and a lower ring (8). The upper ring (7) is fixedly installed at the top of the lower ring (8). The outer diameter of the lower ring (8) is slightly smaller than the inner diameter of the upper ring (7) and the inner diameter of the observation cup (1). The outer side of the lower ring (8) is provided with an external thread, and the inner side of the upper ring (7) and the upper side of the inner side of the observation cup (1) are provided with an internal thread. The external thread is adapted to the internal thread.

3. The observable sedimentation device for detecting parasites in aquatic products according to claim 2, characterized in that, The lower ring (8) is fixedly installed on the inner side by a support ring (9), and the filter screen (6) is placed on top of the support ring (9). The filter screen (6) is adapted to the lower ring (8). The mesh size of the filter screen (6) inside at least two filter components (3) connected end to end decreases from top to bottom.

4. The observable sedimentation device for detecting parasites in aquatic products according to claim 3, characterized in that, The outer surface of the upper ring (7) is provided with anti-slip texture.

5. The observable sedimentation device for detecting parasites in aquatic products according to claim 1, characterized in that, A background pad (11) is placed at the bottom inside the auxiliary observation seat (2). The background pad (11) is black or white and made of opaque material. An LED light strip (10) is fixedly embedded in the side wall inside the auxiliary observation seat (2).

6. The observable sedimentation device for detecting parasites in aquatic products according to claim 5, characterized in that, The auxiliary observation seat (2) has a groove (12) on one side, which is adapted to the drain pipe (4).

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