Tray box suitable for vacuum lossless air tightness detector

Abstract

The tray box comprises a plurality of box body units which can be spliced, each box body unit is of an independent cavity structure, and an air exhaust hole communicated with a detection cavity of the air tightness detector is formed in the bottom of each box body unit; the position of the air exhaust hole corresponds to a groove in the bottom of the to-be-detected bottled product so as to eliminate a parasitic cavity. The bottom of each box body unit is provided with an air exhaust hole communicated with the detection cavity, so that a parasitic cavity formed by contact of a traditional grid box and a groove can be effectively eliminated, interference of local pressure fluctuation on leakage rate calculation is avoided, and the accuracy of a detection result is remarkably improved. Each box body unit is of an independent cavity structure capable of being spliced, and free combination of an A * B matrix is achieved through fast inserting pieces and connecting holes. The inverted-cone-shaped structure of the exhaust hole can guide gas to flow towards the center of the detection cavity in an accelerated mode, vacuumizing time is shortened, and detection efficiency is improved; the air exhaust holes are symmetrically distributed along the center of the bottom to ensure the pressure uniformity of the cavity and further reduce the risk of false detection.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary devices for non-destructive airtightness testing, and more specifically to a tray box suitable for a vacuum non-destructive airtightness tester. Background Technology

[0002] In the field of bottled packaging for food and pharmaceuticals, airtightness testing is one of the core steps in ensuring the quality of aseptic packaging products such as pharmaceuticals and food. Vacuum non-destructive airtightness testing technology monitors gas leakage signals after vacuuming to achieve accurate assessment of the sealing performance of bottled packaging. Its typical process includes: placing the bottled product to be tested in a sealed cavity, evacuating to the target pressure, and then calculating the leakage rate by monitoring the pressure recovery rate. Traditional testing processes rely on manual arrangement of the tested workpieces (such as medicine bottles and food containers), which can easily lead to uneven pressure distribution in the sealed cavity due to bottle tilting or poor contact, resulting in false positives or false negatives. Disorderly placement can also interfere with the uniformity of the vacuum environment, reducing the reliability of the test results. To solve these problems, a single box is used, with partitions inside the box positioning multiple bottled products. This structure easily forms independent sealed spaces when in contact with the grooves at the bottom of the bottled products. See Appendix Figure 1 Such parasitic cavities can cause localized pressure fluctuations during vacuuming, interfering with the true pressure recovery signal in the main detection area and leading to distorted leakage rate calculations. Furthermore, the overall box configuration cannot be adjusted based on the number of bottles being tested.

[0003] Therefore, how to provide a tray box suitable for vacuum non-destructive airtightness testing instruments is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] Therefore, the purpose of this utility model is to propose a tray box suitable for a vacuum non-destructive air tightness tester, so as to adapt to the testing environment of vacuum non-destructive air tightness.

[0005] The technical solution of this utility model is a tray box suitable for a vacuum non-destructive air tightness tester, which includes multiple combinable box units. Each box unit is an independent cavity structure, and its bottom is provided with an air extraction hole that communicates with the test cavity of the air tightness tester. The position of the air extraction hole is set to correspond to the bottom groove of the bottled product to be tested, so as to eliminate parasitic cavities.

[0006] According to the present invention, each of the box units has a connecting hole on its side, and adjacent box units are arranged in an A×B matrix by nesting and splicing concave and convex structures, where A≥2 and B≥2.

[0007] According to the tray box of this utility model, quick-connect inserts are inserted into the connecting holes to form a concave-convex nested structure.

[0008] According to the tray box of this utility model, the two ends of the quick-connect plug are locked and fixed to the connecting hole by threads or snap-fit ​​structure;

[0009] Alternatively, the two ends of the quick-connect plug may fit tightly with the connecting holes.

[0010] According to the tray box of this utility model, the number of air extraction holes is at least one through hole, and they are symmetrically distributed along the center of the bottom of the box unit.

[0011] According to the tray box of this utility model, the wall of the air extraction hole is an inverted conical structure that gradually narrows from the outside to the inside, with a cone angle of 15°-45°, which can guide the gas to flow faster towards the center of the detection chamber.

[0012] As can be seen from the above technical solution, compared with the prior art, the technical effects of this utility model are as follows:

[0013] 1. By setting an air extraction hole at the bottom of each box unit that communicates with the detection chamber, and with the air extraction hole position precisely corresponding to the bottom groove of the bottled product, the parasitic cavity formed by the contact between the traditional compartment box and the groove can be effectively eliminated, avoiding the interference of local pressure fluctuations on the leakage rate calculation, and significantly improving the accuracy of the test results.

[0014] 2. The box unit adopts a modular, independent cavity structure, allowing for free combination of A×B matrices (A≥2, B≥2) via quick-connect inserts and connection holes. This supports rapid adjustment of the tray layout based on the number of bottles to be tested. The quick-connect inserts lock the connection holes using threads, snaps, or tight fits, enabling quick assembly and disassembly of the box unit and stable splicing.

[0015] 3. The inverted conical structure of the evacuation port (cone angle 15°-45°) can guide the gas to flow faster towards the center of the detection chamber, shorten the vacuuming time, and improve the detection efficiency; at the same time, the evacuation ports are symmetrically distributed along the bottom center to ensure the uniformity of the chamber pressure and further reduce the risk of false detection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a parasitic cavity formed between bottled products and the box in the prior art.

[0018] Figure 2 A schematic diagram of the structure of a tray box for eliminating parasitic cavities in a vacuum non-destructive airtightness tester provided by this utility model;

[0019] Figure 3 A schematic diagram of one embodiment of a tray box suitable for a vacuum non-destructive airtightness tester provided by this utility model;

[0020] Figure 4 A schematic diagram of another embodiment of a tray box suitable for a vacuum non-destructive airtightness tester provided by this utility model;

[0021] Figure 5 Schematic diagrams of some other embodiments of a tray box suitable for a vacuum non-destructive airtightness tester provided by this utility model;

[0022] Figure 6 A schematic diagram illustrating the structure of one embodiment of the quick plugin is shown. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Because existing technologies use a single-piece box, a parasitic cavity (J) can easily form when the bottom wall of the box contacts the groove at the bottom of the bottled product. (See appendix) Figure 1 Parasitic cavity J will generate local pressure fluctuations during the vacuuming process, interfering with the real pressure recovery signal of the main detection area, resulting in distorted leakage rate calculation results.

[0026] In view of this, the present invention adopts a tray box suitable for a vacuum non-destructive airtightness tester, comprising multiple combinable box units 1, each of which is an independent cavity structure, and its bottom is provided with an evacuation port 2 communicating with the testing cavity of the airtightness tester; the position of the evacuation port 2 corresponds to the bottom groove of the bottled product to be tested, so as to eliminate parasitic cavities J, see appendix. Figure 2 .

[0027] In the following specific embodiments:

[0028] Example 1, as Figure 3 As shown, the tray box is composed of multiple box units 1 spliced ​​together. Each box unit 1 is an independent cavity structure, and at least one air extraction hole 2 is symmetrically opened at the center of its bottom. In this embodiment, the air extraction hole can be a through hole. The diameter and position of the air extraction hole 2 are designed to match the size of the bottom groove of the bottled product to be tested (for example, when the groove diameter is 10mm, the diameter of the air extraction hole is 8-12mm).

[0029] During the assembly process, individual box units 1 are aligned with adjacent units through a concave-convex structure to form a 2×2 matrix arrangement (which can be expanded to 3×3, 2×4, 5X8, 10X12, etc. as needed); specifically, quick-connect inserts 4 can be inserted into connecting holes 3 and locked in place by rotating the threaded end (or pressing the buckle) to ensure no gaps between the assembled units. Alternatively, quick assembly and disassembly can be achieved by directly using quick-connect inserts 4 to fit tightly into connecting holes 3.

[0030] Example 2: As Figure 4 As shown, the wall of the evacuation port 2 is machined into an inverted conical structure that tapers from the outside in, with a cone angle of 30°. When the airtightness tester starts evacuating, the inverted conical wall guides the gas along the conical surface to converge in the center of the test chamber, accelerating gas discharge. Experiments show that this design can shorten the evacuation time by about 15%, and reduce the pressure distribution uniformity error to within ±1.5%.

[0031] In other embodiments, there may be multiple air extraction ports 2, such as... Figure 5 This can further shorten the vacuuming time.

[0032] Example 3: Quick-connect plugs can be fixed in various ways:

[0033] Threaded locking: Quick-connect plug 4 is a double-ended bolt structure with external threads machined at both ends, and the inner wall of the connecting hole 3 matches the internal thread. During assembly, rotate the bolt until the threads at both ends are fully screwed into the connecting hole 3 to achieve rigid fixation.

[0034] Snap-lock mechanism: The quick-connect insert 4 has elastic snap-lock protrusions at both ends, which correspond to the slots on the inner wall of the connecting hole 3. When the quick-connect insert 4 is inserted, the snap-lock protrusions engage with the slots to form a self-locking mechanism.

[0035] Tight fit: The diameter of the quick-connect plug 4 is slightly larger than the inner diameter of the connecting hole. Friction is fixed through an interference fit, suitable for temporary splicing scenarios. See appendix. Figure 6 .

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "joining", "fixing", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A tray box suitable for a vacuum non-destructive airtightness tester, characterized in that, It includes multiple connectable box units (1), each of which is an independent cavity structure, and its bottom is provided with an air extraction hole (2) that communicates with the detection cavity of the air tightness tester; the position of the air extraction hole (2) is set to correspond to the bottom groove of the bottled product to be tested, so as to eliminate parasitic cavities (J).

2. The tray box suitable for a vacuum non-destructive airtightness tester according to claim 1, characterized in that, Each of the box units (1) has a connecting hole (3) on its side. Adjacent box units (1) are arranged in an A×B matrix by nesting and splicing concave and convex structures, where A≥2 and B≥2.

3. A tray box suitable for a vacuum non-destructive airtightness tester according to claim 2, characterized in that, The quick-connect plug (4) is inserted into the connecting hole (3) to form a concave-convex nested structure.

4. A tray box suitable for a vacuum non-destructive airtightness tester according to claim 3, characterized in that, The quick-connect plug (4) is locked and fixed to the connecting hole (3) at both ends by threads or snap-fit ​​structure; Alternatively, the two ends of the quick-connect plug (4) may be tightly fitted with the connecting holes (3).

5. A tray box suitable for a vacuum non-destructive airtightness tester according to claim 1, characterized in that, The number of air extraction holes (2) is at least one through hole, and they are symmetrically distributed along the bottom center of the box unit (1).

6. A tray box suitable for a vacuum non-destructive airtightness tester according to claim 5. Its features are, The wall of the extraction hole (2) is an inverted conical structure that gradually narrows from the outside to the inside, with a cone angle of 15°-45°, which can guide the gas to accelerate its flow towards the center of the detection cavity.

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