Vacuum moisture-proof composite packaging bag

Abstract

The utility model provides a vacuum moisture-proof composite packaging bag, and relates to the technical field of packaging bags. The air inlet cylinder is communicated with the outer wall of the bag body, and a limiting cavity for inserting an exhaust pipe is formed in the air inlet cylinder; the sealing column is connected to the inner wall of the air inlet cylinder in a sliding mode, the sealing column is of a boss-shaped structure, and an air inlet matched with the sealing column in shape is further formed in the inner wall of the air inlet cylinder; the circular ring sleeves the outer wall of the sealing column on the inner side of the limiting cavity; the second spring is fixedly connected between the inner bottom wall of the limiting cavity and the bottom of the ring; the limiting assembly is arranged at the top of the air inlet cylinder and used for fixing the air suction pipe inserted into the air cylinder, and the limiting assembly comprises two fixing blocks symmetrically arranged on the two sides of the top of the air inlet cylinder. The air inlet cylinder can be directly sealed, and the situation that when the exhaust pipe is pulled out, air is exhausted from the bag body, and the sealing performance of the bag body is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to a vacuum moisture-proof composite packaging bag. Background Art

[0002] Food packaging bags refer to a packaging method in which the product is placed in an airtight packaging container, the air inside the container is extracted, and the sealed container reaches a predetermined vacuum degree. Vacuum bags are also called decompression packaging, which means that all the air in the packaging container is extracted and sealed to maintain a highly decompressed state in the bag. The scarce air is equivalent to a low oxygen effect, which deprives microorganisms of living conditions, so as to achieve the purpose of keeping fruits fresh and free of disease and rot.

[0003] The application number CN202321267974.7 disclosed a vacuum packaging bag including a bag body, a sealing group is arranged at the upper end of the bag body, and a vacuum assembly is glued to the middle of the front end of the bag body. When the utility model is used, the fitting inclined surface is fitted with the corresponding inclined surface, and the vacuum pressure will easily separate the middle bag from the rubber ring, and the outside air entering the inner cavity of the outer bag and the middle bag will squeeze the middle bag and the rubber ring, thereby increasing the fitting strength, reducing the outside air from directly flowing into the packaging bag due to the sealing problem of the vacuum assembly, or the reduction of the preservation effect caused by the damage of the outer packaging bag, and increasing the practical ability.

[0004] Although the above patent can increase the fitting strength of the bag body, in the prior art, the vacuum holes of the packaging bags are manually closed after the vacuum is completed. There is a certain time difference between the personnel pulling out the vacuum tube from the bag body and closing the vacuum hole. Therefore, when the vacuum tube is pulled out of the bag body, air may easily enter the packaging bag, resulting in the failure to reach a vacuum state in the packaging bag, thus affecting the air tightness of the packaging bag. Utility Model Content

[0005] The utility model provides a vacuum moisture-proof composite packaging bag, which can automatically seal the air inlet when the air extraction tube is pulled out of the bag body after the bag body is evacuated, so as to prevent gas from entering the bag body and affecting the sealing performance of the bag body.

[0006] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0007] The embodiment of the utility model provides a vacuum moisture-proof composite packaging bag, comprising:

[0008] Bag body;

[0009] An air inlet cylinder is connected to the outer wall of the bag body, and a limiting cavity for inserting an air extraction pipe is provided inside the air inlet cylinder;

[0010] A sealing column is slidably connected to the inner wall of the air intake cylinder, the sealing column is in a boss-shaped structure, and the inner wall of the air intake cylinder is also provided with an air intake port matching the shape of the sealing column;

[0011] A circular ring is sleeved on the outer wall of the sealing column located on the inner side of the limiting cavity;

[0012] A second spring is fixedly connected between the bottom wall of the limiting cavity and the bottom of the ring;

[0013] The limiting assembly is arranged at the top of the air inlet cylinder and is used to fix the air extraction pipe inserted into the air cylinder.

[0014] Furthermore, the limit assembly includes two fixed blocks symmetrically arranged on both sides of the top of the air intake cylinder, a pull rod slidably connected to the side walls of the fixed blocks, a limit clamp fixedly connected to the side of the pull rod away from the fixed block, and a first spring sleeved on the rod wall of the pull rod between the fixed block and the limit clamp.

[0015] Furthermore, a first chain and a second chain are respectively provided on both sides of the inner wall of the bag body, and a zipper matching with the first chain and the second chain is provided on the bag body.

[0016] Furthermore, a sealing sleeve is provided on the inner wall of one side of the bag body, and a sealing plug matching with the sealing sleeve is provided on the other side of the bag body.

[0017] Furthermore, the sealing plug is a T-shaped structure, and sealing cavities matching with the sealing plug are provided on both sides of the sealing sleeve.

[0018] Furthermore, the inner wall of the bag body is provided with two groups of PET film layers, the bottom of the PET film layer is provided with a composite aluminum film layer, the bottom of the composite aluminum film layer is provided with an elastic fiber woven layer, and the bottom of the elastic fiber woven layer is provided with an absorbent paper pad layer.

[0019] Furthermore, the diameter of the ring is smaller than the diameter of the limiting cavity.

[0020] Furthermore, the sealing plug and the sealing sleeve are both made of elastic material.

[0021] The above solution of the utility model includes at least the following beneficial effects:

[0022] 1. For the vacuum moisture-proof composite packaging bag, when the bag body is being evacuated, the vacuum tube can be inserted into the air inlet cylinder to evacuate the bag body, and when the vacuuming is completed, the vacuum tube can be pulled out of the air inlet cylinder. By means of the provided sealing column, circular ring, second spring and limiting cavity, the air inlet cylinder can be sealed at the moment the vacuum tube is pulled out, thereby achieving the effect of automatic sealing after the bag body is evacuated, and solving the problem in the prior art that after the bag body is vacuumed, the air inlet cylinder cannot be closed automatically and needs to be closed manually, thereby reducing the air tightness of the device.

[0023] 2. The vacuum moisture-proof composite packaging bag improves the elasticity of the packaging bag by setting the PET film layer, composite aluminum film layer, elastic fiber woven layer and absorbent paper pad layer, so that the bag body has better structural strength and is not easy to be damaged. At the same time, the inside of the bag body is kept dry, which solves the problems of the existing packaging bags with elastic bottom, low structural strength and easy damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the vacuum moisture-proof composite packaging bag of the utility model;

[0025] Figure 2 It is a half-section schematic diagram of the vacuum moisture-proof composite packaging bag of the utility model;

[0026] Figure 3 It is an enlarged view of point A of the vacuum moisture-proof composite packaging bag of the utility model;

[0027] Figure 4 It is an enlarged view of point B of the vacuum moisture-proof composite packaging bag of the utility model;

[0028] Figure 5 It is a partial structural diagram of the vacuum moisture-proof composite packaging bag of the utility model.

[0029] Description of reference numerals:

[0030] 1. Bag body; 2. Air inlet tube; 3. Zipper; 4. First chain; 5. Second chain; 6. Sealing plug; 7. Sealing sleeve; 8. Fixed block; 9. Pull rod; 10. First spring; 11. Limiting clip; 12. Sealing column; 13. Second spring; 14. Ring; 15. PET film layer; 16. Composite aluminum film layer; 17. Elastic fiber woven layer; 18. Absorbent paper pad layer; 19. Limiting cavity; 701. Sealing cavity. DETAILED DESCRIPTION

[0031] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0032] like Figures 1 to 5 As shown, an embodiment of the utility model provides a vacuum moisture-proof composite packaging bag, comprising:

[0033] Bag body 1;

[0034] The air inlet cylinder 2 is connected to the outer wall of the bag body 1, and a limiting cavity 19 for inserting an air extraction pipe is provided inside the air inlet cylinder 2;

[0035] The sealing column 12 is slidably connected to the inner wall of the air inlet cylinder 2. The sealing column 12 is a boss-shaped structure. The inner wall of the air inlet cylinder 2 is also provided with an air inlet matching the shape of the sealing column 12.

[0036] The ring 14 is sleeved on the outer wall of the sealing column 12 located inside the limiting cavity 19;

[0037] The second spring 13 is fixedly connected between the inner bottom wall of the limiting cavity 19 and the bottom of the ring 14;

[0038] The limiting assembly is arranged at the top of the air inlet cylinder 2 and is used to fix the air extraction pipe inserted into the air cylinder 2.

[0039] In the embodiment of the utility model, when the bag body 1 is vacuumed, the vacuum pipe is passed into the air inlet cylinder 2, the vacuum pipe is fixed by the limiting assembly, and the sealing column 12 is squeezed. The sealing column 12 compresses the second spring 13 through the ring 14, and the ring 14 loses contact with the inner wall of the limiting cavity 19. At this time, the vacuum pipe is started, and the internal gas of the bag body 1 will flow out from the gap between the ring 14 and the limiting cavity 19. When the vacuuming is completed, the vacuum pipe is taken out of the air inlet cylinder 2, and the second spring 13 is reset to drive the sealing column 12 to move upward through the ring 14. The sealing column 12 will seal the air inlet cylinder 2, avoiding the use of manual closing of the air inlet cylinder 2, thereby improving the air tightness of the device.

[0040] like Figures 1 to 4 As shown, the limit assembly includes two fixed blocks 8 symmetrically arranged on both sides of the top of the air intake cylinder 2, a pull rod 9 slidably connected to the side wall of the fixed block 8, a limit clamp 11 fixedly connected to the side of the pull rod 9 away from the fixed block 8, and a first spring 10 sleeved on the rod wall of the pull rod 9 between the fixed block 8 and the limit clamp 11.

[0041] In the embodiment of the utility model, when the exhaust pipe needs to be installed on the air intake cylinder 2, the pull rod 9 on the air intake cylinder 2 can be pulled, and the pull rod 9 drives the limit clamp 11 to slide along the top of the air intake cylinder 2. At the same time, under the action of the fixing block 8, the first spring 10 will be squeezed. When the pull rod 9 is released again, the exhaust pipe will be fixed under the action of the first spring 10.

[0042] like Figures 1 to 4 As shown, a first chain 4 and a second chain 5 are respectively provided on both sides of the inner wall of the bag body 1, a zipper 3 matching with the first chain 4 and the second chain 5 is provided on the bag body 1, a sealing sleeve 7 is provided on the inner wall of one side of the bag body 1, and a sealing plug 6 matching with the sealing sleeve 7 is provided on the other side of the bag body 1. The sealing plug 6 is a T-shaped structure, and sealing cavities 701 matching with the sealing plug 6 are provided on both sides of the sealing sleeve 7. Both the sealing plug 6 and the sealing sleeve 7 are made of elastic materials.

[0043] In the embodiment of the utility model, when the bag body 1 is evacuated, the bag body 1 is sealed first. Since the sealing plug 6 and the sealing sleeve 7 are both made of elastic materials, the sealing plug 6 can be manually clamped on the sealing sleeve 7 so that the two sides of the sealing plug 6 are located on the sealing cavity 701. After the first sealing is completed, the device can be sealed. Then, the zipper 3 is pulled to connect the first chain 4 with the second chain 5 to complete the second sealing of the bag body 1, thereby further improving the airtightness of the device.

[0044] like Figures 1 to 5 As shown, the inner wall of the bag body 1 is provided with two groups of PET film layers 15, the bottom of the PET film layer 15 is provided with a composite aluminum film layer 16, the bottom of the composite aluminum film layer 16 is provided with an elastic fiber woven layer 17, and the bottom of the elastic fiber woven layer 17 is provided with an absorbent paper pad layer 18.

[0045] In the embodiment of the utility model, the PET film layer 15, PET has excellent gas, water, oil and odor barrier properties, dimensional stability, high transparency, UV blocking, good gloss, the composite aluminum film layer 16 and the elastic fiber woven layer 17 improve the elasticity of the packaging bag, so that the bag body has better structural strength and is not easy to be damaged, and the absorbent paper pad layer 18 can absorb moisture to keep the inside of the bag body 1 dry.

[0046] like Figures 1 to 4 As shown, the diameter of the ring 14 is smaller than the diameter of the limiting cavity 19 .

[0047] In the embodiment of the utility model, since the diameter of the circular ring 14 is smaller than the diameter of the limiting cavity 19 , when the exhaust pipe is exhausting gas, the gas is exhausted from the gap between the circular ring 14 and the limiting cavity 19 .

[0048] The working principle of the utility model is as follows: when the bag body 1 is evacuated, the air suction pipe is passed into the air inlet cylinder 2, the air suction pipe is fixed by the limiting assembly, and the sealing column 12 is squeezed, the sealing column 12 compresses the second spring 13 through the circular ring 14, and the circular ring 14 loses contact with the inner wall of the limiting cavity 19, then the air suction pipe is started, and the gas inside the bag body 1 flows out from the gap between the circular ring 14 and the limiting cavity 19, when the air suction is completed, the air suction pipe is taken out of the air inlet cylinder 2, the second spring 13 is reset to drive the sealing column 12 to move upward through the circular ring 14, and the sealing column 12 will seal the air inlet cylinder 2, avoiding the use of manual closing of the air inlet cylinder 2, thereby improving the air tightness of the device; and when the air suction pipe needs to be installed in the air inlet cylinder 2, the air suction pipe 12 can be easily removed from the air inlet cylinder 2. When the air cylinder 2 is on, the pull rod 9 on the air cylinder 2 can be pulled, and the pull rod 9 drives the limit clamp 11 to slide along the top of the air cylinder 2. At the same time, under the action of the fixing block 8, the first spring 10 will be squeezed. When the pull rod 9 is released again, the exhaust pipe will be fixed under the action of the first spring 10; when the bag body 1 is evacuated, the bag body 1 is first sealed. Since the sealing plug 6 and the sealing sleeve 7 are both made of elastic materials, the sealing plug 6 can be manually clamped on the sealing sleeve 7 so that the two sides of the sealing plug 6 are located on the sealing cavity 701. After the first sealing is completed, the device can be sealed, and then the zipper 3 is pulled to connect the first chain 4 with the second chain 5 to complete the second sealing of the bag body 1, thereby further improving the air tightness of the device.

[0049] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A vacuum moisture-proof composite packaging bag, characterized in that: include: Bag body (1); An air inlet cylinder (2) is connected to the outer wall of the bag body (1), and a limiting cavity (19) for inserting an air extraction pipe is provided inside the air inlet cylinder (2); A sealing column (12) is slidably connected to the inner wall of the air intake cylinder (2); the sealing column (12) is a boss-shaped structure; the inner wall of the air intake cylinder (2) is also provided with an air intake port matching the shape of the sealing column (12); A circular ring (14) is sleeved on the outer wall of the sealing column (12) located inside the limiting cavity (19); A second spring (13) is fixedly connected between the inner bottom wall of the limiting cavity (19) and the bottom of the ring (14); The limiting assembly is arranged at the top of the air inlet cylinder (2) and is used to fix the air extraction pipe inserted into the air cylinder (2).

2. The vacuum moisture-proof composite packaging bag according to claim 1, characterized in that: The limit assembly comprises two fixed blocks (8) symmetrically arranged on both sides of the top of the air intake cylinder (2), a pull rod (9) slidably connected to the side wall of the fixed block (8), a limit clamp (11) fixedly connected to the side of the pull rod (9) away from the fixed block (8), and a first spring (10) sleeved on the rod wall of the pull rod (9) between the fixed block (8) and the limit clamp (11).

3. The vacuum moisture-proof composite packaging bag according to claim 1, characterized in that: A first chain (4) and a second chain (5) are respectively provided on both sides of the inner wall of the bag body (1), and a zipper (3) matching with the first chain (4) and the second chain (5) is provided on the bag body (1).

4. The vacuum moisture-proof composite packaging bag according to claim 1, characterized in that: A sealing sleeve (7) is provided on the inner wall of one side of the bag body (1), and a sealing plug (6) matching with the sealing sleeve (7) is provided on the other side of the bag body (1).

5. The vacuum moisture-proof composite packaging bag according to claim 4, characterized in that: The sealing plug (6) is of a T-shaped structure, and sealing cavities (701) matching with the sealing plug (6) are provided on both sides of the sealing sleeve (7).

6. The vacuum moisture-proof composite packaging bag according to claim 1, characterized in that: The inner wall of the bag body (1) is provided with two groups of PET film layers (15), the bottom of the PET film layer (15) is provided with a composite aluminum film layer (16), the bottom of the composite aluminum film layer (16) is provided with an elastic fiber woven layer (17), and the bottom of the elastic fiber woven layer (17) is provided with an absorbent paper pad layer (18).

7. The vacuum moisture-proof composite packaging bag according to claim 1, characterized in that: The diameter of the circular ring (14) is smaller than the diameter of the limiting cavity (19).

8. The vacuum moisture-proof composite packaging bag according to claim 5, characterized in that: The sealing plug (6) and the sealing sleeve (7) are both made of elastic material.

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