CN217505561U - Combined migration test pool - Google Patents

Abstract

The utility model discloses a combined migration test pool, which comprises a base bottom plate, a cavity, a base cover plate and a screw rod; the screw is provided with a plurality of screws, one end of each screw is arranged on the base bottom plate, and the other end of each screw penetrates through the base cover plate and is locked through a nut, so that the cavity is clamped between the base bottom plate and the base cover plate; the upper surface and the lower surface of the cavity are used as test surfaces and are provided with grooves for placing sealing rings. The utility model discloses migration pool cavity design is the round platform shape, goes up the bottom surface and is two different areas with lower bottom surface, and the bottom surface all can be upright to invert the use from top to bottom, can be applicable to the sample test of two kinds of different test areas. The edge of the upper bottom surface and the edge of the lower bottom surface are both designed into a groove shape, so that a sealing rubber ring can be placed, the sealing performance of the cavity is improved, the simulation liquid and the leakage in the cavity are prevented, and the accuracy of the test is ensured.

Description

Combined migration test pool

Technical Field

The utility model relates to a food detection area, concretely relates to modular migration test pond.

Background

The safety of food contact materials is closely related to food safety. To test the safety of food contact materials, migration tests on food contact materials are required. 3.3 in the national standard GB 5009.156-2016 specifically requires: the migration test assay object is a surface that may come into direct contact with food under reasonably expected use conditions. Therefore, a single-side migration test using a migration test cell is required for a sample that contacts food on one side and has inconsistent material properties on both sides. Some common migration test pools are given in the standard, and some commercial migration test pools are available in the market at present, but a problem generally exists: the volume (V) of each migration test pool is a fixed value, and the area (S) of the contact surface of the sample to be tested and the soak in the migration test pool is also a fixed value, so that the migration test can be only carried out under the condition of a fixed area/volume ratio (S/V ratio), and the requirements of the migration test of different samples under the conditions of different S/V ratios cannot be met. This results in the need to purchase multiple migration test cells with different S/V ratios for each laboratory, which increases the cost burden on the laboratory.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one technical problem existing in the background art, the utility model provides a modular migration test cell.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a combined migration test pool comprises a base bottom plate, a cavity, a base cover plate and a screw rod; the screw is provided with a plurality of screws, one end of each screw is arranged on the base bottom plate, and the other end of each screw penetrates through the base cover plate and is locked through a nut, so that the cavity is clamped between the base bottom plate and the base cover plate;

the upper surface and the lower surface of the cavity are used as test surfaces and are provided with grooves for placing sealing rings.

Further, the center of the base cover plate is provided with a pouring opening.

Furthermore, the bottom of the pouring opening is provided with a chamfer.

Furthermore, the four screw rods are arranged in a rectangular shape.

Further, the cavity is designed to be in a circular truncated cone shape.

Further, the cavity is made of stainless steel or polytetrafluoroethylene materials.

Further, the base cover plate is made of stainless steel or polytetrafluoroethylene materials.

Further, the nut is a butterfly nut.

Further, one end of the screw rod is connected with the base bottom plate through a clamping pin

Compared with the prior art, the utility model, its beneficial effect lies in:

the utility model discloses to the migration pond example that gives in the GB 5009.156-2016 standard and market each money migration pond ubiquitous not enough selling, design a money easy and simple to handle, application scope is wide, can satisfy the migration pond of different S/V sample test demands simultaneously. The migration tank is made of stainless steel as a base, and the cavity is made of stainless steel or polytetrafluoroethylene materials, so that the migration tank can be suitable for migration experiments of various simulation liquids (such as water-based solutions and oily simulation liquids) on the premise of ensuring the rigidity and the machinability of the migration tank. The utility model discloses migration pool cavity design is the round platform shape, goes up the bottom surface and is two different areas with lower bottom surface, and the use can be invertd to all right-positioned in upper and lower bottom surface, can be applicable to the sample test of two kinds of different test areas. The edge of the upper bottom surface and the edge of the lower bottom surface are both designed to be groove-shaped, so that a sealing rubber ring can be placed, the sealing performance of the cavity is improved, the simulation liquid and the leakage in the cavity are prevented, and the accuracy of the test is ensured. If the S/V required by the sample test is larger, selecting a cavity with a larger lower bottom surface for testing; if the S/V required by the sample test is smaller, selecting a cavity with a larger lower bottom surface for testing; if the S/V required for the sample test is very small, the soaking volume can be further increased by combining two or more cavities like bottom grooves, thereby further reducing the S/V ratio of the test. The upper base and the lower base are fixed by the four screw rods in the whole migration pool and are locked by the butterfly nuts, so that the effect of clamping the cavity can be achieved, the use is convenient, and the additional use of tools is not needed. The center of the upper base cover plate is designed into a sprue shape, simulation liquid can be filled in the sprue, then the sprue is plugged by using a glass plug, and the simulation liquid in the cavity is prevented from volatilizing.

Drawings

Fig. 1a-1c are schematic structural diagrams of a combined migration testing tank according to an embodiment of the present invention; wherein, fig. 1a is a front view, fig. 1b is a side view, and fig. 1c is a top view;

FIGS. 2a-2b are schematic views of the structure of the chamber; wherein, fig. 2a is a front view, and fig. 2b is a top view;

FIGS. 3a-3b are schematic structural views of a base cover; wherein, fig. 3a is a front view, and fig. 3b is a top view;

FIG. 4 is an assembly view of the migration pool with the cavity inverted for use;

FIG. 5 is an assembly drawing of the migration pool cavity in combination;

in the figure: 1. a base floor; 2. a base cover plate; 3. a cavity; 4. an infusion port; 5. a screw; 6. a butterfly nut; 7. an upper sealing ring; 8. a lower seal ring; 9. a bayonet lock; 10. and (6) chamfering.

Detailed Description

Example (b):

in the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, so to speak, as communicating between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art. The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

Referring to fig. 1-5, the combined migration test cell provided in this embodiment is mainly composed of three parts, which are a base, a cavity 3 and a base cover 2.

As shown in fig. 1a-1c, the base is composed of a base bottom plate 1, four screws 5 and a butterfly nut 6, wherein the base bottom plate 1 is used as a main stress part and is made of stainless steel, so that the base is corrosion-resistant, difficult to rust and good in rigidity and processability. Four screws 5 are connected to the base bottom plate 1 through clamping pins 9 and matched with the butterfly nuts 6 to clamp the base cover plate 2 and the cavity 3. Four screw rods 5 are distributed in a rectangular shape and are clamped tightly, so that the cavity 3 is stressed uniformly, the cavity 3 cannot be clamped askew, a sample cannot be crushed, and the whole migration pool has better tightness. The whole migration pool uses four screws 5 to fix the base bottom plate 1 and the base cover plate 2, and then is locked by the butterfly nuts 6, so that the effect of clamping the cavity can be achieved, the use is convenient, and additional tools are not needed to be used for assisting in the use

As shown in fig. 2a-2b, the cavity 3 is designed in a truncated cone shape, the cavity 3 is made of stainless steel or polytetrafluoroethylene, the cavity made of stainless steel can be applied to organic reagents such as ethanol and isooctane, and the cavity made of polytetrafluoroethylene can be applied to acidic simulants or for detecting heavy metal elements. The cavity is divided into an upper bottom surface and a lower bottom surface, the upper bottom surface and the lower bottom surface can be used in a positive mode (figure 1) and a reverse mode (figure 4), and the cavity can be suitable for testing samples with two different testing areas. The edge of the upper bottom surface and the edge of the lower bottom surface are both designed into groove shapes, so that sealing rings 7 and 8 can be placed, the sealing performance of the cavity is improved, the simulation liquid in the cavity is prevented from leaking outwards, and the test accuracy is ensured. When a special sample is encountered, for example, the S/V of the sample is very large, a cavity with a larger lower bottom surface is selected for testing; for example, the S/V of the sample is very small, and the volume can be increased by using two cavities with the same size as the bottom groove in combination, so that the use range of the migration pool is enlarged (figure 5). In addition, the cavity can be used for sizing the upper bottom surface and the lower bottom surface according to the size of an experimental sample.

As shown in fig. 3a-3b, the base cover plate 2 is made of stainless steel or polytetrafluoroethylene, and is used with the cavity 3, the center of the base cover plate 2 is designed into the filling opening 4, the simulation liquid can be conveniently filled through the filling opening 4, and the simulation liquid in the cavity 3 can be greatly reduced and evaporated during a long-time high-temperature experiment due to the design of a small opening, so that the experiment can be carried out smoothly. In addition, when the temperature of the solution in the cavity needs to be monitored in real time in an experiment, the plug of the filling port 4 can be made into a cover shape, and the cover is connected with a thermocouple temperature sensor, so that the temperature of the solution in the cavity can be monitored, and the effect of preventing the solution from volatilizing can be achieved.

To sum up, compared with the prior art, the utility model, have following technical advantage:

the utility model discloses innovated design and structure on the basis of migration pond in GB 5009.156-2016 standard, can reach the requirement of test in the GB 5009.156-2016 standard completely.

The migration pool is simple in design and easy and convenient to operate, can be assembled without using additional tools, is uniform in stress of the clamping device, guarantees the whole tightness, and achieves the effect of protecting the cavity and the sample.

The migration pool adopts the split design of the base, the cavity and the base cover plate, is convenient to clean and store, can be selectively replaced when a certain part is damaged, and prolongs the service life.

The upper bottom surface and the lower bottom surface of the cavity can form a test surface, the use range of the migration pool is enlarged, the cost for purchasing the migration pools with different sizes is saved, and the cavity with the same bottom surface groove can be combined for use by aiming at an extreme S/V sample.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (9)

1. A combined migration test pool is characterized by comprising a base bottom plate, a cavity, a base cover plate and a screw rod; the screw rods are provided with a plurality of screw rods, one end of each screw rod is arranged on the base bottom plate, and the other end of each screw rod penetrates through the base cover plate and is locked through a nut, so that the cavity is clamped between the base bottom plate and the base cover plate;

the upper surface and the lower surface of the cavity are used as test surfaces and are provided with grooves for placing sealing rings.

2. The modular migration test cell of claim 1, wherein a pour spout is centrally disposed on said base cover.

3. The modular migration test cell of claim 2, wherein a bottom of said pouring spout is provided with a chamfer.

4. The modular migration test cell of claim 1, wherein said screws are provided with four screws, four screws being arranged in a rectangular pattern.

5. The modular migration test cell of claim 1, wherein said cavity is configured in the shape of a circular truncated cone.

6. The modular migration test cell of claim 1 or 5, wherein said chamber is fabricated using stainless steel or teflon.

7. The modular migration test cell of claim 1 or 2, wherein said base cover is fabricated from a stainless steel or polytetrafluoroethylene material.

8. The modular migration test cell of claim 1, wherein said nut is a butterfly nut.

9. The modular migration test cell of claim 1 or 4, wherein one end of said screw is connected to the base plate by a bayonet lock.

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