Large three-dimensional grain storage bag

Abstract

The utility model discloses a large three-dimensional grain storage bag, which belongs to the technical field of packaging bags, and comprises a bag body enclosed by a sealing film, the bag body comprises a front end wall, a rear end wall and a cylindrical side wall connecting the front end wall and the rear end wall, the cylindrical side wall can form M-shaped folds, and the large three-dimensional grain storage bag is characterized in that the rear end wall is provided with a material port communicated with an inner cavity of the bag body; a switch capable of sealing and closing the material opening is installed on the material opening, an installation hole is formed in the cylindrical side wall, a one-way valve capable of being communicated with an inner cavity of the bag body is installed on the installation hole, and the one-way valve is opened from inside to outside. According to the bag, the material opening can be conveniently opened to load and unload grains, meanwhile, the bag can be closed in a sealed mode after the grains are loaded, and air leakage is avoided; and the one-way valve which is opened from inside to outside is mounted on the cylindrical side wall, so that the bag body can be vacuumized through the one-way valve, the storage quality of the grains is improved, and the storage life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging bags, and particularly relates to a large three-dimensional grain storage bag. Background Art

[0002] At present, most grain collection sites adopt the method of open-air stacking. During rainy and cloudy days, a tarpaulin is covered on the grain pile, which not only increases the workload of the staff, but sometimes causes the phenomenon of grain being drenched due to untimely covering. Even if the tarpaulin is covered, it still cannot prevent the accumulated water on the ground from soaking the grain in contact with the ground, causing the grain at the lower part of the grain pile to get damp, unable to fully protect the grain, affecting the storage quality of the grain, and even causing waste such as mildew, which puts higher requirements on the grain storage link.

[0003] For this reason, the utility model patent with the publication number of CN218259997U discloses a flexible bag-type grain storage device, which is provided with a central processor outside the airtight grain storage bag. The central processor includes a negative pressure dewatering machine and a positive pressure low-temperature drying system. A grain ventilation pipe assembly arranged along the length direction of the airtight grain storage bag is also laid in the airtight grain storage bag. The grain ventilation pipe assembly includes a negative pressure dewatering exhaust pipe and a low-temperature drying inlet pipe arranged side by side. The negative pressure dewatering exhaust pipe is connected to the negative pressure dewatering machine, and the low-temperature drying inlet pipe is connected to the positive pressure low-temperature drying system. In this way, the grain in the bag can be dewatered under negative pressure or ventilated and cooled at any time. Although this grain storage device can improve the storage quality of grain to a certain extent, it increases the use cost of users, resulting in its inability to be popularized. And because the negative pressure dewatering exhaust pipe and the low-temperature drying inlet pipe must have a certain anti-deformation ability and need to use pipes with a certain strength, the storage bag cannot be completely folded, and the empty bag still needs to occupy a large storage space. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a large three-dimensional grain storage bag that can store grain naturally in a vacuum state.

[0005] The technical solution adopted by the utility model to solve its technical problems is: designing a large three-dimensional grain storage bag, which includes a bag body made of a sealing film. The bag body includes a front end wall, a rear end wall, and a cylindrical side wall connecting the front end wall and the rear end wall. The cylindrical side wall can form an M-shaped fold. The characteristics are that: a material port communicating with the inner cavity of the bag body is opened on the rear end wall, and a switch capable of sealing and closing the material port is installed on the material port. An installation hole is opened on the cylindrical side wall, and a one-way valve capable of communicating with the inner cavity of the bag body is installed on the installation hole. The one-way valve opens from the inside to the outside.

[0006] Further, the one-way valve includes a valve seat, the valve seat has a first flange, a valve cover is assembled in the valve seat, a valve port is opened on the valve cover, an elastic sheet is installed on the valve cover, the elastic sheet can block the valve port, the valve cover has a second flange, and the cylindrical side wall is pressed between the first flange and the second flange.

[0007] Further, a protective cylinder is provided on the valve cover, and the elastic sheet is located inside the protective cylinder.

[0008] Further, a sealing gasket is provided on the first flange and / or the second flange, and the sealing gasket is press-fitted on the cylindrical side wall.

[0009] Further, the valve cover is fitted with the valve seat by means of a thread.

[0010] Further, the number of the one-way valves is more than two, and the more than two one-way valves are uniformly arranged along the front-back direction of the bag body.

[0011] Further, the sealing film is a PE film.

[0012] Further, the switch is a PVC flat-pull zipper, and the PVC flat-pull zipper is heat-sealed on the cylindrical side wall.

[0013] Further, the PVC flat-pull zipper includes a male chain and a female chain, the male chain has teeth, the female chain has grooves, and the teeth can be tightly fitted in the grooves.

[0014] Further, the outer contour line of the cross-section of the teeth is arc-shaped.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. Since a material opening communicating with the inner cavity of the bag body is formed in the rear end wall, and a switch capable of sealing and closing the material opening is installed on the material opening, it is possible to conveniently open the material opening for loading and unloading grains, and at the same time, it can be hermetically closed after loading grains to avoid air leakage; and a one-way valve that opens from the inside to the outside is installed on the cylindrical side wall, so that the inside of the bag body can be evacuated through the one-way valve, thereby improving the storage quality of grains and prolonging the storage period.

[0017] 2. Since the one-way valve is fitted with a valve cover in the valve seat, the valve seat has a first flange, the valve cover has a second flange, a valve opening is formed in the valve cover, and an elastic sheet is installed on the valve cover, and the elastic sheet can block the valve opening, which not only simplifies the structure of the one-way valve itself, but also uses a mature installation structure to facilitate the installation operation of the one-way valve on the bag body, which is beneficial to improving its cost performance.

[0018] 3. Since a protective cylinder is provided on the valve cover and the elastic sheet is located inside the protective cylinder, on the one hand, it can protect the elastic sheet to avoid elastic deformation under the action of accidental external force and damage the vacuum state inside the bag body; on the other hand, it is convenient for the tight installation of the vacuum pumping pipeline, which is beneficial to improving the working efficiency of vacuum pumping.

[0019] 4. Since a sealing gasket is provided on the first flange and / or the second flange, and the sealing gasket is press-fitted on the cylindrical side wall, it is beneficial to improve the connection sealing performance of the one-way valve on the bag body and extend the maintenance time limit of the vacuum state in the bag body.

[0020] 5. Since the valve cover is fitted with the valve seat by threads, the technology is mature and easy to implement.

[0021] 6. By setting the number of one-way valves to more than two, the bag body can be evacuated simultaneously through more than two one-way valves, improving the working efficiency of evacuation.

[0022] 7. Since both the sealing film and the switch are made of PE material, on the one hand, it is beneficial to improve the cost performance of the grain storage bag, and on the other hand, it is convenient to achieve the sealing combination between the switch and the bag body, reducing the combination cost.

[0023] 8. Since the PVC flat-pull zipper with a specific structure is adopted, not only the structure of the hinge is simplified, but also the sealing performance of the connection between the sub-chain and the mother-chain is improved.

[0024] 9. The utility model adopts the most natural method of using a sealed packaging material and then evacuating the air, which improves the storage quality of grains, reduces the use cost of the existing technology, is easier to popularize and use, and comprehensively improves the storage quality of grains, and is worthy of popularization and use in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0026] Figure 2 is a three-dimensional structural schematic diagram of the one-way valve;

[0027] Figure 3 is a schematic diagram of the installation structure of the one-way valve on the bag body.

[0028] The labels in the figure are: 1. Bag body; 11. Front end wall; 12. Cylindrical side wall; 13. Rear end wall; 2. One-way valve; 21. Valve seat; 211. First flange; 22. Valve cover; 221. Second flange; 222. Protection cylinder; 223. Elastic piece; 224. Valve port; 3. PVC flat-pull zipper; 4. Sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following further describes the utility model in detail with reference to the drawings and specific embodiments.

[0030] When the utility model is in use, with reference to the moving direction of the trailer from the rear to the front, the end close to the front end of the pallet is defined as the front end, and correspondingly, the end close to the rear end of the pallet is defined as the rear end.

[0031] Such as Figure 1As shown in the figure, the present utility model is provided with a front end wall 11, a rear end wall 13 and a cylindrical side wall 12 connecting the front end wall 11 and the rear end wall 13 in the bag body 1. The distance between the front end wall 11 and the rear end wall 13 can be set to 60 - 90 meters, that is, the length of the bag body 1, specifically 60 meters, 75 meters or 90 meters, or any value within this range, so that the grain storage bag is in a three-dimensional shape and can increase the grain storage capacity. The bag body 1 is made of PE film, so that the cylindrical side wall 12 can form an M-shaped fold, which is convenient for filling grains after M-shaped folding from the front end of the bag body 1 along the cylindrical side wall 12 to the rear, and is convenient for placing the bag body 1 on a moving vehicle for mechanized grain loading, saving manpower. A material port communicating with the inner cavity of the bag body 1 is opened on the rear end wall 13. A sub-chain of a PVC flat-pull zipper 3 is heat-sealed on one side of the rear end wall 13 of the material port, and a mother-chain of the PVC flat-pull zipper 3 is heat-sealed on the other side of the rear end wall 13. The mother-chain has a chain groove, and the sub-chain has chain teeth. The chain teeth can be closely fitted in the chain groove, and the outer contour line of the cross-section of the chain teeth is arc-shaped, which can not only facilitate the opening and closing between the sub-chain and the mother-chain, but also improve the sealing performance of the connection between the sub-chain and the mother-chain. The PVC flat-pull zipper 3 is a mature existing technology, and can be specifically seen on the zipper of a transparent document bag. An installation hole is also opened on the cylindrical side wall 12, and a one-way valve 2 communicating with the inner cavity of the bag body 1 is installed on the installation hole. The one-way valve 2 opens from the inside to the outside. Specifically, as Figure 2 shown, a valve seat 21 and a valve cover 22 fitted with the valve seat 21 by thread are provided in the one-way valve 2. The valve seat 21 has a first flange 211. A valve cover 22 is fitted in the valve seat 21. A valve port 224 is opened on the valve cover 22. An elastic sheet 223 is installed on the valve cover 22, and the elastic sheet 223 can block the valve port 224. The valve cover 22 has a second flange 221. The cylindrical side wall 12 around the installation hole is pressed between the first flange 211 and the second flange 221. This not only simplifies the structure of the one-way valve 2 itself, but also facilitates the installation operation of the one-way valve 2 on the bag body 1 by using a mature installation structure, which is beneficial to improving its cost performance.

[0032] In order to improve the sealing performance of the installation between the one-way valve 2 and the cylindrical side wall, as Figure 3As shown in the figure, the utility model further provides a sealing gasket 4 on the first flange 211. The sealing gasket 4 is press-fitted on the cylindrical side wall 12, so that the sealing gasket 4 can tightly press the cylindrical side wall 12 between the first flange 211 and the second flange 221, thereby improving the connection sealing performance of the one-way valve 2 on the bag body 1 and facilitating the extension of the maintenance time limit of the vacuum state in the bag body 1. Of course, the sealing gasket 4 can also be arranged on the second flange 221, or sealing gaskets 4 can be arranged on both the first flange 211 and the second flange 221, all of which can achieve the tight press-fitting of the cylindrical side wall. A protective cylinder 222 is also provided on the valve cover 22. The protective cylinder 222 is sleeved on the outer periphery of the elastic piece 223, so that the elastic piece 223 is located inside the protective cylinder 222. On the one hand, it can protect the elastic piece 223 from elastic deformation under the action of accidental external forces and damage the vacuum state in the bag body 1; on the other hand, it is convenient for the tight installation of the vacuum pumping pipeline and is conducive to improving the working efficiency of vacuum pumping.

[0033] During use, open the PVC flat-pull zipper 3, open the material opening, fold the side wall of the same row in an M shape, so that the material opening is close to the front wall 11 of the bag body 1. Place the bag body 1 on a movable trolley, connect the front end of the bag body 1 to the front end of the trolley, start the grain loading machine, load grain into the bag body 1 through the material opening, so that the front section of the bag body 1 is filled with grain, then move the trolley forward, so that the bag body 1 releases a section to form a release section, and then continue to load grain into the release section until all the M-shaped folded parts are released and filled with grain. Then close the material opening through the PVC flat-pull zipper 3, connect a vacuum pumping device such as a vacuum pump to the protective cylinder 222 of the one-way valve 2, open the elastic piece 223 under the action of the suction force, and pump out the air in the bag body 1 until the bag body 1 is in a vacuum state, completing the overall packaging of the grain in the bag body 1. When unloading the grain, just open the PVC flat-pull zipper 3 to unload the grain, and the emptied bag body 1 can be used again to hold grain.

[0034] In addition to using the above-mentioned PVC flat-pull zipper 3 as the switch that can seal and close the material opening, other switches with specific structures that can seal and close can also be used, and no specific limitation is imposed on its structure. Similarly, the one-way valve is not limited to the specific structure of the above-mentioned one-way valve 2, as long as it can achieve one-way opening from the inside to the outside. In addition to using the above-mentioned PE film as the sealing film, other resin films such as PVC film, PP film or PS film can also be used. The number of installation holes can also be set to more than two, and then one-way valves 2 are installed in each installation hole. The bag body 1 can be vacuumed through more than two one-way valves 2, improving the working efficiency of vacuum pumping.

[0035] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in any other form. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model.

Claims

1. A large three-dimensional grain storage bag, comprising a bag body enclosed by a sealing film. The bag body includes a front end wall, a rear end wall, and a cylindrical side wall connecting the front end wall and the rear end wall. The cylindrical side wall can form an M-shaped fold, and it is characterized in that: A material inlet communicating with the inner cavity of the bag body is formed in the rear end wall, and a switch capable of sealing and closing the material inlet is installed on the material inlet. An installation hole is formed in the cylindrical side wall, and a one-way valve capable of communicating with the inner cavity of the bag body is installed on the installation hole. The one-way valve opens from the inside to the outside.

2. The large three-dimensional grain storage bag according to claim 1, characterized in that: The one-way valve includes a valve seat which has a first flange. A valve cover is assembled in the valve seat. A valve port is formed in the valve cover. An elastic sheet is installed on the valve cover and can block the valve port. The valve cover has a second flange. The cylindrical side wall is pressed between the first flange and the second flange.

3. The large three-dimensional grain storage bag according to claim 2, characterized in that: A protective cylinder is provided on the valve cover, and the elastic sheet is located inside the protective cylinder.

4. The large three-dimensional grain storage bag according to claim 3, characterized in that: A sealing washer is provided on the first flange or / and the second flange, and the sealing washer is pressed against the cylindrical side wall.

5. The large three-dimensional grain storage bag according to claim 4, characterized in that: The valve cover is assembled with the valve seat by threads.

6. The large three-dimensional grain storage bag according to claim 5, characterized in that: The number of the one-way valves is two or more, and the two or more one-way valves are evenly arranged in the front-rear direction of the bag body.

7. The large three-dimensional grain storage bag according to any one of claims 1 to 6, characterized in that: The sealing film is a PE film.

8. The large three-dimensional grain storage bag according to claim 7, characterized in that: The switch is a PVC flat-pull zipper, and the PVC flat-pull zipper is heat-sealed on the cylindrical side wall.

9. The large three-dimensional grain storage bag according to claim 8, wherein: The PVC flat-pull zipper includes a sub-chain and a mother-chain. The sub-chain has chain teeth, and the mother-chain has chain grooves. The chain teeth can be closely assembled in the chain grooves.

10. The large three-dimensional grain storage bag according to claim 9, characterized in that: The outer contour line of the cross-section of the chain teeth is arc-shaped.

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