Labyrinth exhaust valve bag

Abstract

The utility model discloses a labyrinth exhaust valve bag, which relates to the technical field of valve bags and comprises a bag body, a bag opening is arranged on one side of the top of the bag body, a reinforcing bottom piece is arranged at the bottom in the bag body, and an exhaust layer is arranged at the top in the bag body. A sticky groove is formed in the side, close to the bag opening, of the top of the bag body, and a sealing belt is arranged at the top of the sticky groove. According to the utility model, the exhaust adding layer is adhered to the top of the bag body, and the two exhaust channels are arranged, so that a labyrinth type exhaust structure can be formed, and redundant air in the bag body can be quickly and effectively exhausted in the stacking process on the premise of not damaging the integrity and the sealing property of the bag body of the valve bag, thereby ensuring the compactness of materials and the stability of packaging.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bags, in particular to a labyrinth exhaust valve bag. Background Art

[0002] Valve bags, commonly known as paste-bottom bags, are widely used, environmentally friendly packaging bags favored by various industries for their convenient and efficient filling. Valve bags are typically fed through a valve port at the top or bottom, and utilize specially designed filling equipment to ensure smooth material flow into the bag. After filling, the valve bags form a neat cube, making them easy to stack and transport, saving storage space. These bags are typically made of polypropylene (PP) or polyethylene (PE), offering excellent durability and moisture resistance, making them widely used in industries such as chemicals, building materials, grain, feed, and plastic pellets.

[0003] However, the valve design of traditional valve bags usually lacks sufficient ventilation function, which may form air pockets during filling or stacking, resulting in uneven packaging and affecting subsequent handling and storage. Specifically, it cannot be exhausted in time and effectively during palletizing. When the material is filled into the valve bag, the air in the bag cannot be quickly discharged, which may cause the air pressure in the bag to increase, thereby affecting the density of the material and the stability of the packaging. The design of an independent exhaust valve will increase the manufacturing cost of the valve bag itself and affect the integrity of the valve bag.

[0004] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content

[0005] In response to the problems in the related art, the present invention proposes a labyrinth exhaust valve bag to overcome the above-mentioned technical problems existing in the existing related art.

[0006] To this end, the specific technical solutions adopted in this utility model are as follows:

[0007] A labyrinth exhaust valve bag comprises a bag body, a bag opening is provided on one side of the top of the bag body, a reinforcing bottom sheet is provided at the bottom of the bag body, and an exhaust layer is provided at the top of the bag body; a sticking groove is provided on one side of the top of the bag body near the bag opening, and a sealing tape is provided on the top of the sticking groove.

[0008] Furthermore, in order to improve the mechanical strength and packaging stability of the valve bag and enhance the tensile and tear resistance of the bag body, reinforcing side ribs are provided on the bottom and inner wall of the bag body. The reinforcing side ribs are an integrated strip structure, and the bottom of the reinforcing side ribs is located between the bag body and the reinforced bottom film.

[0009] Furthermore, in order to utilize the slow-flow belt to reduce the impact force when the material falls during filling, and the inclined setting of the slow-flow belt will not cause any obstruction to the entry and exit of the material, and can also be folded inward to reduce the space occupied after the bag body is stored, the inner wall of the bag body is provided with multiple equidistantly arranged slow-flow belts, and the slow-flow belts of different heights are staggered in sequence, and the slow-flow belts are in an inclined structure; the two sides of the slow-flow belt are bonded to the inner wall of the bag body, and an inward folding mark is provided in the middle position of the slow-flow belt.

[0010] Furthermore, in order to remove excess air inside the bag through an independent exhaust channel and improve the density of the material, edge sealing strips are provided on both sides between the top of the bag body and the exhaust layer, and a middle strip is provided in the middle position between the top of the bag body and the exhaust layer, forming an exhaust channel between the edge sealing strip and the middle strip.

[0011] Furthermore, in order to transport the air in the bag to the exhaust channel through the exhaust cut and then discharge it out of the bag along the exhaust holes, exhaust holes are opened on the top of the bag body and on both sides of the sticky groove. The exhaust holes are located at the top of the exhaust channel, and several exhaust cuts are opened at the bottom of the exhaust layer.

[0012] Furthermore, in order to adjust the sticking position of the sealing tape, adjust the ventilation degree of the exhaust hole, and switch the sealing or ventilation state, fixing glue is provided on both sides of the sticking groove, and the sticking groove is fixedly connected to the middle part of the sealing tape, and sealing glue that cooperates with the fixing glue is provided on the bottom of both sides of the sealing tape.

[0013] The beneficial effects of the utility model are:

[0014] 1. By sticking an exhaust layer on the top of the bag and setting up two exhaust channels, a labyrinth-type exhaust structure can be formed. Without destroying the integrity and sealing of the valve bag, the excess air inside the bag can be quickly and effectively discharged during the palletizing process, thereby ensuring the density of the material and the stability of the packaging.

[0015] 2. By setting up a slow-flow belt, the impact on the bottom of the valve bag during the material filling process can be reduced, avoiding damage or deformation of the bag. At the same time, combined with the reinforced bottom sheet and reinforced side ribs, the mechanical strength and tensile and tear resistance of the bag can be effectively enhanced, thereby further improving the stability of the valve bag packaging.

[0016] 3. By designing the sealing tape, the connection position of the sealing glue and the fixing glue can be changed, and the curvature of the sealing tape can be adjusted to form an arched structure to achieve ventilation of the exhaust holes. In a humid environment, it can be adjusted to a closed structure to prevent external humid gas from affecting the internal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic structural diagram of a labyrinth exhaust valve bag according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of a labyrinth exhaust valve bag according to an embodiment of the present utility model;

[0020] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0021] Figure 4 This is a schematic diagram of the top structure of a labyrinth exhaust valve bag according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of a labyrinth exhaust valve bag in a folded state according to an embodiment of the present utility model.

[0023] In the picture:

[0024] 1. Bag body; 2. Bag opening; 3. Reinforcement bottom sheet; 4. Ventilation layer; 5. Adhesive groove; 6. Sealing tape; 7. Reinforced side ribs; 8. Slow-flow tape; 9. Inward fold mark; 10. Edge sealing strip; 11. Middle strip; 12. Ventilation channel; 13. Vent hole; 14. Vent incision; 15. Fixing glue; 16. Sealing glue. DETAILED DESCRIPTION

[0025] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0026] According to an embodiment of the present utility model, a labyrinth exhaust valve bag is provided.

[0027] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 1-Figure 5As shown, the labyrinth exhaust valve bag according to the embodiment of the present invention includes a bag body 1, a bag opening 2 is opened on one side of the top of the bag body 1, a reinforcing bottom sheet 3 is provided at the bottom of the bag body 1, and an exhaust layer 4 is provided at the top of the bag body 1; a sticky groove 5 is opened on one side of the top of the bag body 1 near the bag opening 2, and a sealing tape 6 is provided on the top of the sticky groove 5.

[0028] With the help of the above technical solution, a labyrinth-type exhaust structure can be formed by sticking an exhaust layer 4 on the top of the bag body 1. Without destroying the integrity and sealing of the valve bag bag body 1, the excess air inside the bag body 1 can be quickly and effectively discharged during the stacking process, thereby ensuring the density of the material and the stability of the packaging.

[0029] In one embodiment, for the above-mentioned bag body 1, the inner bottom and inner side wall of the bag body 1 are provided with reinforcing side ribs 7, the reinforcing side ribs 7 are an integrated strip structure, and the bottom of the reinforcing side ribs 7 is located between the bag body 1 and the reinforced bottom film 3, thereby improving the mechanical strength and packaging stability of the valve bag and enhancing the tensile and tear resistance of the bag body 1.

[0030] In one embodiment, for the above-mentioned bag body 1, the inner wall of the bag body 1 is provided with a plurality of equally spaced slow-flow belts 8, and the slow-flow belts 8 of different heights are staggered in sequence, and the slow-flow belts 8 are inclined; the two sides of the slow-flow belts 8 are bonded to the inner wall of the bag body 1, and an inward folding indentation 9 is provided in the middle position of the slow-flow belt 8, so that the slow-flow belts 8 are used to reduce the impact force of the material when it is filled and falls, and the inclined setting of the slow-flow belts 8 will not cause obstruction to the entry and exit of the material. In addition, it can be folded inward to reduce the space occupied after the bag body 1 is stored.

[0031] In one embodiment, for the above-mentioned bag body 1, edge sealing strips 10 are provided on both sides between the top of the bag body 1 and the exhaust layer 4, and an intermediate strip 11 is provided in the middle position between the top of the bag body 1 and the exhaust layer 4. An exhaust channel 12 is formed between the edge sealing strip 10 and the intermediate strip 11, so that the excess air inside the bag body 1 is discharged through the independent exhaust channel 12, thereby improving the density of the material.

[0032] In one embodiment, for the above-mentioned bag body 1, exhaust holes 13 are opened at the top of the bag body 1 and on both sides of the inside of the sticky groove 5. The exhaust holes 13 are located at the top of the exhaust channel 12, and a plurality of exhaust cuts 14 are opened at the bottom of the exhaust layer 4, so that the air in the bag is transported to the exhaust channel 12 through the exhaust cuts 14, and then discharged to the outside of the bag body 1 along the exhaust holes 13.

[0033] In one embodiment, for the above-mentioned sticking groove 5, fixing glue 15 is provided on both sides of the sticking groove 5, the sticking groove 5 is fixedly connected to the middle part of the sealing tape 6, and sealing glue 16 that cooperates with the fixing glue 15 is provided on the bottom of both sides of the sealing tape 6, so that the sticking position of the sealing tape 6 can be adjusted, the ventilation degree of the exhaust hole 13 can be adjusted, and the sealing or ventilation state can be switched.

[0034] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process is described in detail below.

[0035] In actual application, the valve bag in the folded storage state is transferred to the material filling machine, and the bag mouth 2 is put on the feeding pipe of the filling machine. By feeding the material into the bag, the bag body 1 will gradually expand. During the expansion process, the slow-flow belt 8 is also gradually flattened, slowing the flow of the falling material and reducing the impact force until the material filling is completed. At this time, the bag body 1 is a square block structure, and the bag mouth 2 can be sealed using heat sealing technology or glue bonding. After the valve bag is sealed, it needs to be stacked or stacked, and the excess air in the bag needs to be removed at the same time. The two ends of the completely sticky sealing tape 6 can be torn open, and the edge of the sealing glue 16 can be stuck to the edge of the fixing glue 15. At this time, the sealing tape 6 will form a bulge, and the exhaust hole 13 can be in contact with the outside world. The air inside the exhaust channel 12 is gradually discharged along the exhaust hole 13. When it is completely discharged or the environment is too humid, the sealing tape 6 can be completely closed to avoid affecting the material inside the valve bag.

[0036] In summary, with the help of the above technical solution of the present invention, by gluing the exhaust layer 4 on the top of the bag body 1 and setting up two exhaust channels 12, a labyrinth-type exhaust structure can be formed. Under the premise of not destroying the integrity and sealing of the valve bag body 1, the excess air inside the bag body 1 can be quickly and effectively discharged during the stacking process, thereby ensuring the density of the material and the stability of the packaging. By setting the slow-flow belt 8, the impact on the bottom of the valve bag during the material filling process can be reduced, and the bag body 1 can be avoided from being damaged or deformed. At the same time, in conjunction with the reinforced bottom film 3 and the reinforced side ribs 7, the mechanical strength and tensile and tear resistance of the bag body 1 can be effectively enhanced, thereby further improving the stability of the valve bag packaging. By designing the sealing belt 6, the degree of curvature of the sealing belt 6 can be adjusted by changing the connection position of the sealing glue 16 and the fixing glue 15, forming an arched structure to achieve ventilation of the exhaust hole 13. In a humid environment, it can be adjusted to a closed structure to prevent external humid gas from affecting the internal material.

[0037] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A labyrinth exhaust valve bag, comprising a bag body (1), a bag opening (2) being opened on one side of the top of the bag body (1), characterized in that: The bottom of the bag body (1) is provided with a reinforcing bottom sheet (3), and the top of the bag body (1) is provided with an exhaust layer (4); A sticking groove (5) is provided on one side of the top of the bag body (1) close to the bag opening (2), and a sealing tape (6) is provided on the top of the sticking groove (5).

2. A labyrinth exhaust valve bag according to claim 1, characterized in that: The inner bottom and inner side wall of the bag body (1) are provided with reinforcing side ribs (7), the reinforcing side ribs (7) are an integrated belt-shaped structure, and the bottom of the reinforcing side ribs (7) is located between the bag body (1) and the reinforcing bottom sheet (3).

3. The labyrinth exhaust valve bag according to claim 1, characterized in that: The inner side wall of the bag body (1) is provided with a plurality of equally spaced slow-flow belts (8), the slow-flow belts (8) of different heights are staggered and distributed in sequence, and the slow-flow belts (8) are in an inclined structure.

4. A labyrinth exhaust valve bag according to claim 3, characterized in that: Both sides of the slow-flow belt (8) are bonded to the inner wall of the bag body (1), and an inward folding indentation (9) is provided in the middle of the slow-flow belt (8).

5. The labyrinth exhaust valve bag according to claim 1, characterized in that: Edge sealing strips (10) are provided on both sides between the inner top of the bag body (1) and the exhaust layer (4), a middle strip (11) is provided in the middle between the inner top of the bag body (1) and the exhaust layer (4), and an exhaust channel (12) is formed between the edge sealing strips (10) and the middle strip (11).

6. The labyrinth exhaust valve bag according to claim 5, characterized in that: Exhaust holes (13) are provided at the top of the bag body (1) and on both sides of the inside of the sticky groove (5). The exhaust holes (13) are located at the top of the exhaust channel (12). A plurality of exhaust cutouts (14) are provided at the bottom of the exhaust layer (4).

7. A labyrinth exhaust valve bag according to claim 1 or 6, characterized in that: Fixing glue (15) is provided on both sides of the sticking groove (5), the sticking groove (5) is fixedly connected to the middle part of the sealing tape (6), and sealing glue (16) that matches the fixing glue (15) is provided on the bottom of both sides of the sealing tape (6).

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