Packing box with multiple layers of barriers

Abstract

The utility model relates to the field of packaging boxes, and particularly discloses a multi-layer barrier packaging box which comprises a packaging box and an upper cover plate, a valve seat is mounted on the upper surface of the upper cover plate, an inflation valve is mounted on one side in the valve seat, a spring is mounted in the inflation valve, a valve plate is mounted on the inner side wall of the inflation valve above a valve element, and the valve plate is connected with the valve seat. An exhaust valve is installed on the other side of the interior of the valve seat, a movable cover plate is connected to the interior of the exhaust valve, a sealing plug is installed on the lower surface of the movable cover plate, a movable groove is formed in the outer side of the exhaust valve, a push sliding block is installed in the threaded sealing cover, and a push rod is connected between the push sliding block and the movable cover plate through a movable hinge. When gas on the inner side of the inner partition layer is heated to expand, the pushing sliding block is integrally pushed upwards in the movable groove, so that the push rod controls the movable cover plate to rotate integrally and then closes a passage in the exhaust valve by the closing plug, and then the purposes of exhausting and pressure relief are achieved.

Description

Technical Field

[0001] The utility model relates to the field of packaging boxes, in particular to a multi-layer barrier packaging box. Background Art

[0002] Packaging boxes made of high-barrier materials such as PET, EVOH, PP, etc. can ensure the isolation of stored items to a great extent. By setting up multiple layers of partitions inside the box, the airtightness of the entire packaging can be further improved. By evacuating the air in the packaging box and then filling it with a certain proportion of a mixed gas of nitrogen, oxygen and carbon dioxide, and then sealing the packaging box, the shelf life of the packaged items can be guaranteed to a great extent.

[0003] However, when the items inside the packaging box expand due to their own function or temperature, the gas cannot be properly exhausted, causing the packaging box to collapse and fail to provide protection. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a multi-layer barrier packaging box, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solution: a multi-layer barrier packaging box, comprising a packaging box and an upper cover plate, a valve seat is installed on the upper surface of the upper cover plate, an inflation valve is installed on one side of the interior of the valve seat, a threaded sealing cover is installed on the upper end of the inflation valve, a spring is installed inside the inflation valve, a valve core is installed on the upper end of the spring, a valve plate is installed on the inner side wall of the inflation valve above the valve core, an exhaust valve is installed on the other side of the interior of the valve seat, a movable cover plate is connected to the interior of the exhaust valve, a closing plug is installed on the lower surface of the movable cover plate, a movable groove is opened on the outer side of the exhaust valve, a pushing slider is installed inside the threaded sealing cover, and a push rod is connected between the pushing slider and the movable cover plate via a movable hinge.

[0006] As a further solution of the utility model: an inner partition layer is installed inside the packaging box, a partition closing groove is installed above the inner partition layer corresponding to the lower surface of the upper cover plate, an air injection pipe is installed on one side of the packaging box, and an exhaust pipe is arranged on one side of the air injection pipe.

[0007] As a further solution of the utility model: a card slot is provided on the upper surface of the packaging box, and a card block is installed on the lower surface of the upper cover plate above the card slot.

[0008] As a further solution of the utility model: the inflation valve and the exhaust valve are both arranged through the valve seat, the valve core is clamped with the valve plate, and the threaded sealing cover is engaged and fixed with the inflation valve.

[0009] As a further solution of the utility model: a rotating shaft is installed between the movable cover plate and the exhaust valve, and the pushing slider is slidably connected to the movable groove.

[0010] As a further solution of the utility model: the inner partition layer is clamped with the partition closing groove, and the air injection pipe and the exhaust pipe are both arranged through the packaging box.

[0011] As a further solution of the utility model: a ventilation pipeline is opened below the closing plug and inside the exhaust valve.

[0012] As a further solution of the utility model: the card slot is card-connected with the card block.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When the gas inside the inner partition layer expands due to heat, the push slider is pushed upward inside the movable groove as a whole, so that the push rod controls the movable cover plate to rotate as a whole, disconnects the sealing plug from sealing the passage inside the exhaust valve, and achieves the purpose of exhaust pressure relief.

[0015] 2. By connecting the air injection pipe to the inflation mechanism, opening the exhaust pipe as a whole, and exhausting the gas by pumping inert gas into the outer space of the inner partition layer, and then closing the air injection pipe and the exhaust pipe respectively, the items stored in the inner partition layer can be protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a multi-layer barrier packaging box;

[0017] Figure 2 It is a cross-sectional view of an inflation valve in a multi-layer barrier packaging box;

[0018] Figure 3 It is a cross-sectional view of an exhaust valve in a multi-layer barrier packaging box;

[0019] Figure 4 A cross-sectional view of an entire packaging box in a multi-layer barrier packaging box;

[0020] Figure 5 The figure is a schematic diagram of the structure of an upper cover plate in a multi-layer barrier packaging box.

[0021] In the figure: 1, packaging box; 2, upper cover plate; 3, valve seat; 4, air injection pipe; 5, exhaust pipe; 6, inner partition layer; 7, card slot; 8, card block; 201, partition closing groove; 301, threaded sealing cover; 302, inflation valve; 303, spring; 304, valve core; 305, valve plate; 306, exhaust valve; 307, movable cover plate; 308, push slider; 309, closing plug; 310, movable groove. DETAILED DESCRIPTION

[0022] 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 utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-5 As shown, this embodiment provides a multi-layer barrier packaging box, including a packaging box 1 and an upper cover plate 2, a valve seat 3 is installed on the upper surface of the upper cover plate 2, an air filling valve 302 is installed on one side of the inner part of the valve seat 3, a threaded sealing cover 301 is installed on the upper end of the air filling valve 302, the threaded sealing cover 301 is engaged and fixed with the air filling valve 302, a spring 303 is installed inside the air filling valve 302, a valve core 304 is installed on the upper end of the spring 303, a valve plate 305 is installed on the inner side wall of the air filling valve 302 above the valve core 304, the valve core 304 is clamped with the valve plate 305, and an exhaust valve 303 is installed on the other side of the inner part of the valve seat 3 6. Both the inflation valve 302 and the exhaust valve 306 are arranged through the valve seat 3. The exhaust valve 306 is connected with a movable cover plate 307 inside. A rotating shaft is installed between the movable cover plate 307 and the exhaust valve 306. A closing plug 309 is installed on the lower surface of the movable cover plate 307. A ventilation pipeline is opened inside the exhaust valve 306 below the closing plug 309. A movable groove 310 is opened on the outer side of the exhaust valve 306. A pushing slider 308 is installed inside the threaded sealing cover 301. The pushing slider 308 is slidably connected with the movable groove 310. A push rod is connected between the pushing slider 308 and the movable cover plate 307 through a movable hinge.

[0024] like Figure 2-5 As shown, in this embodiment, an inner partition layer 6 is installed inside the packaging box 1, and a partition closing groove 201 is installed above the inner partition layer 6 corresponding to the lower surface of the upper cover plate 2, and the inner partition layer 6 is clamped with the partition closing groove 201, and an air injection pipe 4 is installed on one side of the packaging box 1, and an exhaust pipe 5 is arranged on one side of the air injection pipe 4, and the air injection pipe 4 and the exhaust pipe 5 are both arranged through the packaging box 1, and a clamping slot 7 is opened on the upper surface of the packaging box 1, and a clamping block 8 is installed on the lower surface of the upper cover plate 2 above the clamping slot 7, and the clamping slot 7 is clamped with the clamping block 8.

[0025] The working principle of the utility model is as follows: when packaging is required, the items to be packaged are placed on the inner side of the inner partition layer 6 inside the packaging box 1, the upper cover plate 2 is positioned above the lid packaging box 1 as a whole, the inner partition layer 6 is clamped in the partition closing groove 201, the clamping block 8 is clamped in the clamping groove 7 and pressed to tighten the whole, the air injection pipe 4 is connected to the inflation mechanism, the exhaust pipe 5 is opened as a whole, inert gas is pumped into the outer space of the inner partition layer 6 to exhaust, and the air injection pipe 4 and the exhaust pipe 5 are closed respectively, so that the items stored in the inner partition layer 6 can be protected, and then the threaded seal is disconnected. After the cover 301 closes the inflation valve 302, the position of the inflation valve 302 is used to pump inert gas to blow the valve core 304 to squeeze the spring 303 to deform, and then the inert gas is transported into the inner partition layer 6 to extend the shelf life of the goods. When the gas inside the inner partition layer 6 expands due to heat, the pushing slider 308 is pushed upward inside the movable groove 310 as a whole, so that the push rod controls the movable cover plate 307 to rotate as a whole, and then disconnects the sealing plug 309 from sealing the passage inside the exhaust valve 306, so as to relieve the pressure on the inner partition layer 6, and then the pushing slider 308 is pulled downward as a whole and limited to close the passage of the exhaust valve 306.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-layer barrier packaging box, comprising a packaging box (1) and an upper cover plate (2), characterized in that: A valve seat (3) is installed on the upper surface of the upper cover plate (2); an inflation valve (302) is installed on one side of the interior of the valve seat (3); a threaded sealing cover (301) is installed on the upper end of the inflation valve (302); a spring (303) is installed inside the inflation valve (302); a valve core (304) is installed on the upper end of the spring (303); a valve plate (305) is installed on the inner side wall of the inflation valve (302) above the valve core (304); An exhaust valve (306) is installed on the other side of the interior of 3), the interior of the exhaust valve (306) is connected to a movable cover plate (307), a sealing plug (309) is installed on the lower surface of the movable cover plate (307), a movable groove (310) is opened on the outer side of the exhaust valve (306), a pushing slider (308) is installed inside the threaded sealing cover (301), and a push rod is connected between the pushing slider (308) and the movable cover plate (307) through a movable hinge.

2. A multi-layer barrier packaging box according to claim 1, characterized in that: An inner partition layer (6) is installed inside the packaging box (1); a partition sealing groove (201) is installed above the inner partition layer (6) corresponding to the lower surface of the upper cover plate (2); an air injection pipe (4) is installed on one side of the packaging box (1); and an exhaust pipe (5) is provided on one side of the air injection pipe (4).

3. The multi-layer barrier packaging box according to claim 1, characterized in that: The upper surface of the packaging box (1) is provided with a card slot (7), and a card block (8) is installed on the lower surface of the upper cover plate (2) above the card slot (7).

4. The multi-layer barrier packaging box according to claim 1, characterized in that: The inflation valve (302) and the exhaust valve (306) are both arranged to penetrate the valve seat (3), the valve core (304) is clamped with the valve plate (305), and the threaded sealing cover (301) is meshed and fixed with the inflation valve (302).

5. The multi-layer barrier packaging box according to claim 1, characterized in that: A rotating shaft is installed between the movable cover plate (307) and the exhaust valve (306), and the pushing slider (308) is slidably connected to the movable groove (310).

6. The multi-layer barrier packaging box according to claim 2, characterized in that: The inner partition layer (6) is snap-fitted to the partition sealing groove (201), and the air injection pipe (4) and the air exhaust pipe (5) are both arranged to penetrate the packaging box (1).

7. The multi-layer barrier packaging box according to claim 1, characterized in that: A ventilation pipeline is provided below the sealing plug (309) and inside the exhaust valve (306).

8. The multi-layer barrier packaging box according to claim 3, characterized in that: The card slot (7) is card-connected with the card block (8).

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