Closed migration test pool capable of simultaneously carrying out multiple parallel tests

Abstract

The utility model provides a closed migration test pool capable of simultaneously carrying out multiple parallel tests, which relates to the technical field of food detection, and comprises a base, a plurality of containers and a cover plate, the plurality of containers are arranged on the base, the tops of the plurality of containers are provided with filling ports, and the cover plate is arranged on the plurality of containers and seals the plurality of filling ports. The base and the cover plate are detachably connected through a connecting piece. According to the utility model, a plurality of parallel samples can be tested at the same time, simulation liquid can be conveniently injected, and volatilization is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of food detection, in particular to a closed migration test pool capable of performing multiple parallel tests simultaneously. Background Art

[0002] In addition to the food itself, the safety of food contact materials is also of great importance. In order to ensure the safety and reliability of food contact materials, the Food Safety Law stipulates that migration tests need to be conducted on food contact materials. 3.3 of the national standard GB5009.156-2016 clearly states: "The object of migration test is the surface that may be in direct contact with food under reasonable expected conditions of use." Therefore, for samples that are in contact with food on one side and the materials on both sides are inconsistent, a special test tool, the migration test pool, is required to conduct a single-sided migration test. The standard lists several migration test pools. At present, there are also some commercialized migration test pools on the market. However, the above migration test pools generally have the following problems: Common migration pools are designed with independent liquid filling ports to facilitate the filling of migration test simulation liquid, but in actual operation, after the migration test is completed, the volume of the migration test simulation liquid may evaporate and decrease or even be completely lost, making the experimental results inaccurate; independent migration test pools can generally only test one parallel sample at the same time, and multiple parallel samples require multiple migration test pools, which may be one of the factors affecting the non-parallel test results and the failure of precision to meet the standard requirements. Utility Model Content

[0003] In view of the problems in the prior art that multiple parallel sample tests cannot be performed simultaneously and the simulation liquid is easy to evaporate during the test, the utility model provides a closed migration test cell that can perform multiple parallel tests simultaneously, can perform multiple parallel sample tests simultaneously, and facilitates the filling of simulation liquid and reduces volatility.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model provides a closed migration test pool capable of performing multiple parallel tests simultaneously, comprising:

[0006] Pedestal;

[0007] A plurality of containers are arranged on the base, and a filling port is provided on the top of each of the plurality of containers;

[0008] A cover plate, which is disposed on the plurality of containers and seals the plurality of filling ports;

[0009] The base and the cover plate are detachably connected via a connecting piece.

[0010] As described above, the closed migration test pool that can perform multiple parallel tests simultaneously, further, the connecting piece includes a screw, the base has a first notch, the cover has a threaded hole, one end of the screw is fixed at the first notch, and the other end of the screw passes through the threaded hole and is threadedly connected to the threaded hole.

[0011] As described above, the closed migration test pool that can perform multiple parallel tests simultaneously, further, the connecting piece includes a screw and a butterfly nut, the base has a first notch, the cover has a second notch, one end of the screw is fixed at the first notch, the other end of the screw passes through the second notch and is threadedly connected to the butterfly nut, and the butterfly nut is pressed against the cover.

[0012] The closed migration test cell capable of simultaneously performing multiple parallel tests as described above further includes a bayonet, a pin hole is provided in the first notch, and the bayonet is engaged with the pin hole and clamps the screw.

[0013] As described above, the closed migration test pool capable of simultaneously performing multiple parallel tests, further, a groove is provided at the edge of the filling port, and a sealing rubber ring is placed in the groove.

[0014] As described above, the closed migration test pool capable of simultaneously performing multiple parallel tests, further, the base is provided with a plurality of outward protrusion structures, the bottoms of the plurality of containers are provided with inward recessed structures, and the protrusion structures can be snap-fitted with the recessed structures.

[0015] As described above, the closed migration test pool capable of simultaneously performing multiple parallel tests, further, the base is made of stainless steel.

[0016] As described above, the closed migration test pool capable of simultaneously performing multiple parallel tests, further, the cover plate is made of stainless steel.

[0017] As described above, in the closed migration test cell capable of simultaneously performing multiple parallel tests, further, the screw is made of stainless steel.

[0018] As described above, the closed migration test cell capable of simultaneously performing multiple parallel tests, further, the container is made of stainless steel or glass.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The utility model has a simple design and is easy to operate. It can be assembled without the help of other tools. The clamping device is evenly stressed, which not only ensures the overall airtightness, but also protects the container and the sample.

[0021] 2. The utility model has a simple structure and is easy to disassemble for cleaning and storage. If a part is damaged, it can be replaced to extend the service life;

[0022] 3. The utility model can test multiple parallel samples at the same time, avoiding errors caused by various test conditions when using multiple migration pools for testing, thereby improving the precision of the test;

[0023] 4. The container of the utility model eliminates the independent liquid filling port and adopts a simple three-sided closed design, which avoids the volatilization and loss of the simulation liquid caused by poor sealing of the liquid filling port. At the same time, the container can be used as a container for preheating the simulation liquid, reducing the purchase and use of experimental utensils and saving test costs;

[0024] 5. The container design of the utility model is changed to directly fill the simulation liquid and then place the sample, which avoids the situation that the simulation liquid is poured from the filling port after the sample is placed, and the air inside the container cannot be discharged smoothly, resulting in difficulty in filling;

[0025] 6. The installation method of the cover plate of the utility model facilitates accurate observation of the installation status between the sample and the container, and between the sample and the sealing rubber ring, avoiding the common installation of the migration pool first and then filling the simulation liquid, which makes it impossible to observe and confirm the installation status of the sealing rubber ring, resulting in leakage;

[0026] 7. After the experiment, the utility model needs to remove the cover plate to take out the transfer simulation liquid, which is convenient for observing and confirming the state change of the sample test surface. At the same time, due to the simple design of the container without an independent liquid filling port, the simulation liquid can be taken out to the greatest extent, greatly reducing the residual simulation liquid in the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the structure of the migration test pool of the utility model embodiment;

[0029] Figure 2 This is a front view of a migration test pool according to an embodiment of the utility model;

[0030] Figure 3 It is a left view of the migration test pool of the embodiment of the utility model;

[0031] Figure 4 This is a front view of a container according to an embodiment of the utility model;

[0032] Figure 5 A top view of a container according to an embodiment of the utility model;

[0033] In the figure: 1. base; 2. cover plate; 3. container; 4. filling port; 5. screw; 6. butterfly nut; 7. bayonet pin; 8. sealing rubber ring. DETAILED DESCRIPTION

[0034] 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 present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] Example:

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" in the embodiments of the utility model and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise clearly defined. In addition, unless otherwise clearly defined and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] The utility model provides a technical solution: a closed migration test pool capable of simultaneously performing multiple parallel tests, comprising a base 1, a plurality of containers 3 and a cover plate 2, wherein the plurality of containers 3 are arranged on the base 1, and a filling port 4 is opened on the top of the plurality of containers 3, the cover plate 2 is arranged on the plurality of containers 3 and seals the plurality of filling ports 4, and the base 1 and the cover plate 2 are detachably connected via a connecting piece.

[0041] For details, see Figures 1 to 4The migration test pool has few components, only a base 1, a container 3 and a cover plate 2; the assembly and disassembly are simple, and only a plurality of containers 3 need to be placed on the base 1, and the filling port 4 on the top of the container 3 is sealed with the cover plate 2, and the base 1 and the cover plate 2 are fixed with the screw 5. The entire assembly process can complete the assembly and fastening operations without the aid of other tools, and the fastening effect is safe and reliable. At the same time, it is convenient for later cleaning and replacement after component damage. Unlike the existing migration test pool, the migration test pool needs to be inverted when in use, and the cover plate 2 is the main force-bearing part. After inversion, due to the effect of gravity, the simulated liquid and the sample can be fully contacted to reduce the bubbles between them. At this time, the screw 5 can play a better reinforcement role to avoid accidental separation of the cover plate 2, thereby causing leakage of the simulated liquid or the sample. Moreover, multiple containers 3 can be placed on the base 1 at the same time, so that multiple parallel samples can be measured at the same time. According to the requirements of the national standard, it can meet the blank test and the simultaneous testing of two parallel samples. During the test, the temperature, time and other test conditions can be kept consistent to the greatest extent, avoiding the use of multiple sets of migration test cells for testing, and various test conditions and factors causing errors, thereby improving the precision of the test and reducing the test error. In addition, unlike the existing containers, there is no additional liquid filling port. This container 3 only has a filling port 4 opened on the top, and the side and bottom are designed to form an integrated sealing structure. The simulated liquid can only be poured in or poured out from the only filling port 4 (i.e., the contacting sample). In this way, the possibility of volatilization of the simulated liquid inside the container 3 can be reduced by reducing the design of the opening, thereby improving the sealing performance. Another advantage of the structural design with only one filling port 4 is that the sample can be placed directly after the simulated liquid is filled, thereby avoiding the situation where the simulated liquid cannot be filled from the filling port 4 after the sample is placed, resulting in difficulty in filling due to the inability to discharge the air (air pressure difference) inside the container 3 smoothly. After the test, the cover plate 2 needs to be removed to take out the transferred simulation object, which is convenient for observing and confirming the state change of the sample test surface. At the same time, since the design of the container 3 is simple and there is no independent liquid filling port, the simulated liquid can be removed to the greatest extent, which greatly reduces the residual simulated liquid in the container 3. The connecting parts include but are not limited to components that can be connected, such as clips, clamps, and screws. For example, when a clip is used as a connecting part, two clips are respectively installed on the two opposite sides of the base 1 and the cover plate 2, and the two clips are interlocked to clamp the middle container 3; when a clamp is used as a connecting part, the clamp is embedded in the two outward sides of the base 1 and the cover plate 2 to clamp the middle container 3; when a screw is used as a connecting part, a corresponding threaded hole is opened on the base 1 or the cover plate 2 to cooperate with the screw thread to clamp the middle container 3.

[0042] In the above embodiment, further, the container 3 is designed to be cylindrical, but according to actual use requirements, it can be designed to other shapes, such as prism, cuboid, cube, etc., and the base 1 and the cover plate 2 are both designed to be cuboid. Similarly, they can be designed to other shapes according to requirements. The effective contact area of ​​the container 3 is designed to be between 0.2dm2 and 2.0dm2. The size of the specific filling port 4 and the height of the container 3 can be formulated according to the size of the sample, so as to adapt to more samples and reduce the error introduced by the test area being too small when the total migration test is performed. The volume of the container 3 is designed to adapt to the effective contact area, so that the S / V ratio can be selected between 1.0 and 100, and the S / V ratio span can reach 100 times. In addition, the container 3 can choose to use a directly heated container. Since the simulated liquid needs to be preheated during the test, the container 3 can be selected as a container that can be directly heated. The simulated liquid can be poured into the container 3 and then preheated. After the preheating is completed, it is directly assembled on the base 1 for the migration test, which saves the use of experimental utensils and reduces costs.

[0043] As an optional implementation, in some embodiments, the connecting member includes a screw 5, the base 1 is provided with a first notch, the cover plate 2 is provided with a threaded hole (not shown in the figure), one end of the screw 5 is fixed at the first notch, and the other end of the screw 5 passes through the threaded hole and is threadedly connected with the threaded hole. Among them, one end of the screw 5 is threadedly matched and fixed with the threaded hole on the cover plate 2, and the other end of the screw 5 is clamped in the first notch of the base 1. The fixing structure is simple, and at the same time, there are few parts and it is easy to install and disassemble.

[0044] As an optional embodiment, in some embodiments, the connecting member includes a screw 5 and a butterfly nut 6, the base 1 is provided with a first notch, the cover plate 2 is provided with a second notch, one end of the screw 5 is fixed at the first notch, the other end of the screw 5 passes through the second notch and is threadedly connected with the butterfly nut 6, and the butterfly nut 6 is pressed against the cover plate 2. In which, different from the above-mentioned embodiment, only a second notch (no thread) is required on the cover plate 2, but the butterfly nut 6 is pressed against the cover plate 2 by the locking fit with the screw 5, so that the multiple containers 3 between the base 1 and the cover plate 2 can be stably clamped, and in addition, each container 3 can be evenly stressed without crushing the sample, while ensuring the airtightness of the entire migration test pool. This structure does not require the assistance of other tools, and is more convenient to operate and use.

[0045] As an optional implementation, in some embodiments, a bayonet 7 is further included, the base 1 is provided with a first notch, a pin hole (not shown) is provided in the first notch, and the bayonet 7 is engaged with the pin hole and clamps the screw 5. Installing the bayonet 7 on the base 1 to fix the screw 5 can effectively prevent the screw 5 from falling off due to accidental loosening, thereby separating the container 3 from the base 1 or the cover plate 2, causing the simulated liquid or sample in the container 3 to leak, and thus causing the test failure.

[0046] As an optional implementation, in some embodiments, a groove (not shown) is provided at the edge of the filling port 4, and a sealing rubber ring 8 is placed in the groove. Figure 5 , wherein, the installation of the sealing rubber ring 8 can make the migration test pool have a better sealing effect, prevent the leakage of the simulated liquid or the sample, and at the same time, the sealing rubber ring 8 itself has good wear resistance and corrosion resistance, which can extend the service life of the container 3. In addition, after the sealing rubber ring 8 is installed, in conjunction with the installation method of the cover plate 2 of the migration test pool, the installation status between the sample and the container 3, and between the sample and the sealing rubber ring 8 can be conveniently and accurately observed, avoiding the common migration test pool first installed and then filled with simulated liquid, resulting in the inability to observe and confirm the installation status of the sealing rubber ring 8, and causing leakage.

[0047] As an optional implementation, in some embodiments, the base 1 is provided with a plurality of outward protrusions (not shown in the figure), and the bottoms of the plurality of containers 3 are provided with inward recesses (not shown in the figure), and the protrusions can be engaged with the recesses. In order to further improve the stability of the migration test pool, a protrusion is provided on the base 1, and a recess is provided at the bottom of the container 3 with a size and shape that matches the protrusion. In this way, when the container 3 is placed on the base 1, the container 3 with the recess is engaged with the base 1 with the protrusion, so that the container 3 can be prevented from moving out of the base 1 due to an accidental collision.

[0048] As an optional implementation, in some embodiments, the base 1 is made of stainless steel, which has the advantages of corrosion resistance, not easy to rust, good rigidity and processability, and is suitable for the use environment of the migration test cell.

[0049] As an optional implementation, in some embodiments, the cover plate 2 is made of stainless steel, which has the advantages of corrosion resistance, not easy to rust, good rigidity and processability, and is suitable for the use environment of the migration test cell.

[0050] As an optional implementation, in some embodiments, the material of the screw rod 5 is stainless steel. Stainless steel has the advantages of corrosion resistance, not easy to rust, good rigidity and processability, etc., and is suitable for the use environment of the migration test cell.

[0051] As an optional implementation, in some embodiments, the container 3 is made of stainless steel or glass. Stainless steel has the advantages of corrosion resistance, rust resistance, good rigidity and processability, while glass has good heat resistance and chemical stability. The stainless steel container 3 can be used for organic reagents such as ethanol and isooctane, and the glass container 3 can be used for organic reagents, acid simulants or the detection of heavy metal element migration.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 the utility model. 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable ordinary technicians in the field to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the essence of the content of the utility model should be included in the protection scope of the utility model.

Claims

1. A closed migration test pool capable of performing multiple parallel tests simultaneously, characterized in that: include: Pedestal; A plurality of containers are arranged on the base, and a filling port is provided on the top of each of the plurality of containers; A cover plate, which is disposed on the plurality of containers and seals the plurality of filling ports; The base and the cover plate are detachably connected via a connecting piece.

2. The closed migration test pool capable of performing multiple parallel tests simultaneously according to claim 1, characterized in that: The connecting member includes a screw rod, the base is provided with a first notch, the cover plate is provided with a threaded hole, one end of the screw rod is fixed at the first notch, and the other end of the screw rod passes through the threaded hole and is threadedly connected with the threaded hole.

3. The closed migration test cell capable of performing multiple parallel tests simultaneously according to claim 1, characterized in that: The connecting member includes a screw and a butterfly nut, the base is provided with a first notch, the cover is provided with a second notch, one end of the screw is fixed at the first notch, the other end of the screw passes through the second notch and is threadedly connected to the butterfly nut, and the butterfly nut is pressed against the cover.

4. The closed migration test cell capable of performing multiple parallel tests simultaneously according to claim 2 or 3, characterized in that: It also includes a bayonet pin, a pin hole is opened in the first notch, and the bayonet pin is engaged at the pin hole and clamps the screw rod.

5. The closed migration test cell capable of performing multiple parallel tests simultaneously according to claim 1, characterized in that: A groove is provided at the edge of the filling port, and a sealing rubber ring is placed in the groove.

6. The closed migration test cell capable of performing multiple parallel tests simultaneously according to claim 1, characterized in that: The base is provided with a plurality of outwardly protruding structures, and the bottoms of the plurality of containers are provided with inwardly concave structures, and the protruding structures can be snap-fitted with the concave structures.

7. The closed migration test cell capable of performing multiple parallel tests simultaneously according to claim 1, characterized in that: The base is made of stainless steel.

8. The closed migration test cell capable of performing multiple parallel tests simultaneously according to claim 1, characterized in that: The cover plate is made of stainless steel.

9. The closed migration test cell capable of performing multiple parallel tests simultaneously according to claim 2 or 3, characterized in that: The material of the screw is stainless steel.

10. The closed migration test cell capable of performing multiple parallel tests simultaneously according to claim 1, characterized in that: The container is made of stainless steel or glass.

Images