Liquid bag for 40 feet container transportation

Abstract

The utility model provides a kind of liquid bag for 40 feet container transport, belong to container liquid bag technical field, this liquid bag for 40 feet container transport, including container liquid bag bag body, valve for loading and unloading liquid and the strap for tightening container liquid bag bag and draw;The container liquid bag bag body includes inner bag and outer bag, the inner bag is made of one layer and above polyethylene or polyethylene copolymer;The outer bag is made of one layer polypropylene woven cloth and one layer coating fabric;Valve is arranged on the one side upper end of the container liquid bag bag body;The strap is equidistantly fixed on the outer bag outside of the container liquid bag bag body in multiple groups;The inner bag is cylindrical film, two ends form airtight space by welding, and there is heat sealing line at welding position;The utility model can solve the problem that current container liquid bag cannot meet the adaptation of 40 feet container, the problem of insufficient structural strength and sealing property, and the problem of liquid surge affecting stability.

Description

Technical Field

[0001] This utility model belongs to the field of container liquid bag technology, specifically, it relates to a liquid bag for transporting 40-foot containers. Background Technology

[0002] As a flexible packaging container for transporting non-hazardous liquids, containerized liquid bags are gradually replacing traditional packaging such as tanks and drums in the chemical, food, and agricultural product industries due to their advantages of low cost and high flexibility. However, most containerized liquid bags currently on the market are only compatible with 20-foot containers and cannot meet the transportation needs of 40-foot containers. 40-foot containers have a larger volume, placing higher demands on the structural strength, sealing performance, and dimensional adaptability of the liquid bags. Simply enlarging existing 20-foot liquid bags can easily lead to problems such as insufficient bag load-bearing capacity and poor stability due to liquid flow.

[0003] Structurally, existing liquid bags are mostly single-layer or simple double-layer structures. The inner bag material lacks sufficient leak-proof resistance, and the outer bag lacks adequate abrasion resistance and tensile strength, making it difficult to withstand the external forces generated by prolonged bumping during 40-foot container transport. Furthermore, liquid surging during transport exacerbates bag wear and shortens its service life. In addition, existing liquid bag splicing processes mostly use simple sewing, resulting in insufficient sealing and strength, making them prone to breakage at the splice points under the heavy load of a 40-foot container. In summary, current container liquid bags suffer from problems such as inability to adapt to 40-foot containers, insufficient structural strength and sealing, and stability issues caused by liquid surging. Utility Model Content

[0004] In view of this, the present invention provides a liquid bag for 40-foot container transportation, which can solve the problems that current container liquid bags cannot meet the requirements of 40-foot containers, have insufficient structural strength and sealing performance, and have stability affected by liquid surging.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a liquid bag for transporting 40-foot containers, comprising a container liquid bag body, a valve for loading and unloading liquid, and straps for securing the container liquid bag handle; the container liquid bag body includes an inner bag and an outer bag, the inner bag being composed of one or more layers of polyethylene or polyethylene copolymer; the outer bag being composed of one layer of polypropylene woven fabric and one layer of coated fabric; the valve is located on the upper side of one side of the container liquid bag body; the straps are fixed to the outer side of the outer bag of the container liquid bag body in multiple sets at equal intervals.

[0007] The technical advantages of the liquid bag provided by this utility model for transporting 40-foot containers are as follows: By using polyethylene or its copolymer as the inner bag and polypropylene woven fabric and coated fabric as the outer bag, and with multiple sets of equidistant straps for auxiliary fixation, the liquid bag can meet the strength specifications of the 40-foot container. The inner bag material improves the leak resistance, the double-layer structure of the outer bag enhances the wear resistance and tensile strength, and the straps initially restrict the flow of liquid. This solves the problem that liquid bags in the production stage cannot meet the structural strength requirements of 40-foot containers.

[0008] Based on the above technical solution, the liquid bag of this utility model for 40-foot container transportation can be further improved as follows:

[0009] The inner bag is a cylindrical film with both ends welded together to form a sealed space, and the welded joint has a heat seal line.

[0010] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the sealing performance of the inner bag is improved by welding, and the heat-sealed line at the weld can prevent leakage at both ends of the inner bag due to liquid pressure; and the sealing performance of the liquid bag is improved.

[0011] Furthermore, the outer bag's polypropylene woven fabric is tubular, located on the outer layer of the inner bag, in the middle layer, and reinforced with polypropylene woven fabric at both ends.

[0012] The beneficial effects of adopting the above-mentioned improvement scheme are: it can enhance the structural strength of both ends of the outer bag, and prevent the ends from deforming or breaking due to excessive load after the 40-foot liquid bag is filled with liquid; it meets the large volume load-bearing requirements of the 40-foot liquid bag.

[0013] Furthermore, the width of the outer bag is consistent with the outer dimensions of the liquid bag body, and the polypropylene woven fabric and the reinforced polypropylene woven fabric are sewn together to the inner bag and fixed with stitching lines.

[0014] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by further improving the connection strength through sewing, the outer bag and the inner bag are ensured to fit tightly, avoiding relative displacement inside the bag during transportation, solving the problem of poor fit between the inner and outer bags of the liquid bag and easy displacement leading to structural instability, and enhancing the overall structural stability of the liquid bag.

[0015] Furthermore, the valve is a ball valve or a butterfly valve, the valve flange is located in the middle of the inner bag, and the valve body is located outside the polypropylene woven fabric layer of the outer bag. The valve is fixed to the container liquid bag body by bolts.

[0016] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: using ball valves or butterfly valves makes opening and closing convenient and provides good sealing performance; the flange and inner bag are centered to ensure uniform force during loading and unloading; and bolt fixing improves the stability of the connection between the valve and the bag body.

[0017] Furthermore, the valve is available in three-inch or four-inch sizes to match standard three-inch or four-inch quick-connect fittings.

[0018] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by limiting the size specifications of the valve and quick-connect, the valve can be quickly connected to the standard quick-connect, which greatly shortens the loading and unloading time and meets the rapid loading and unloading requirements of the large volume of the 40-foot liquid bag.

[0019] Furthermore, the coated fabric, after being spliced ​​together, is in a tubular shape and is disposed on the outside of the polypropylene woven fabric, located at the outermost layer.

[0020] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by using coated fabric as the outermost layer, the wear resistance and corrosion resistance of the container liquid bag are further enhanced, and the cylindrical structure is used to ensure the overall integrity of the outer bag.

[0021] Furthermore, adjacent joints of the coated fabric are joined by lap welding, and strips of coated fabric are provided at the joints.

[0022] The beneficial effects of adopting the above-mentioned improvement scheme are: the lap welding increases the strength of the splice, and the coating fabric strips are further reinforced to prevent the splice from breaking due to the large load of the 40-foot liquid bag.

[0023] Furthermore, a reinforcing layer is welded to the outer bag near the valve, and the surface of the reinforcing layer has a cross or star-shaped opening. The valve passes through the opening and is fixed with a hose clamp. The upper surface of the short side of the outermost coated fabric is longer than the lower surface.

[0024] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the strength of the structure around the valve is improved by setting a reinforcing layer, the valve is further prevented from loosening by using a hose clamp, and the long and short sides of the coated fabric are designed to fit the needs of bag installation.

[0025] Furthermore, the straps are made of flexible material to mitigate the surging effect of liquid within the container's liquid bag.

[0026] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by using flexible straps that can deform slightly with the flow of liquid, the impact force of the buffer liquid can be better buffered, the surging effect can be reduced, and the rigid straps can be avoided from causing wear to the bag.

[0027] Compared with existing technologies, the beneficial effects of this utility model's liquid bag for 40-foot container transportation are as follows: The inner bag of this design uses polyethylene or its copolymer to ensure leak-proof performance, while the outer bag uses polypropylene woven fabric as the middle layer and coated fabric as the outer layer, reinforced with woven fabric at both ends and lap-welded together, significantly improving tensile strength, wear resistance, and sealing performance, thus meeting the large-volume load-bearing requirements of 40-foot containers. The use of three- or four-inch standard ball valves or butterfly valves with quick-connect fittings facilitates operation and further improves loading and unloading efficiency. Flexible straps, reinforced layers around the valves, and hose clamps provide fixation, addressing issues of liquid surging and valve loosening. This overall solution not only fills the gap in existing liquid bags' inability to adapt to 40-foot containers but also reduces the risk of leakage and damage during transportation through the coordinated use of various components, balancing economy and reliability, and meeting the long-distance transportation needs of non-hazardous liquids in various fields such as chemicals and food. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the container liquid bag being laid flat;

[0030] Figure 2 A flat image of a container liquid bag after the outer coating fabric has been removed;

[0031] Figure 3 A schematic diagram of valve installation;

[0032] Figure 4 A schematic diagram of the welding of the outer coating fabric;

[0033] Figure 5 This is a schematic diagram of welding the short side of the coated fabric.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 10. Container liquid bag body; 11. Valve; 12. Straps; 13. Inner bag; 14. Outer bag; 15. Polypropylene woven fabric; 16. Coated fabric; 17. Heat sealing thread; 18. Reinforced polypropylene woven fabric; 19. Sewing thread; 20. Flange; 21. Valve body; 22. Bolt; 23. Coated fabric strip; 24. Reinforcing layer; 25. Opening; 26. Hose clamp. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0037] like Figure 1-5 The illustration shows an embodiment of a liquid bag for transporting 40-foot containers provided by this utility model. In this embodiment, it includes a container liquid bag body 10, a valve 11 for loading and unloading liquids, and straps 12 for securing the container liquid bag handle. The container liquid bag body includes an inner bag 13 and an outer bag 14. The inner bag is composed of one or more layers of polyethylene or polyethylene copolymer. The outer bag is composed of one layer of polypropylene woven fabric 15 and one layer of coated fabric 16. The valve is located on the upper side of one side of the container liquid bag body. The straps are fixed to the outer side of the outer bag of the container liquid bag body in multiple sets at equal intervals.

[0038] In the above technical solution, the inner bag is a cylindrical film, and the two ends are welded to form a sealed space, with a heat-sealed line 17 at the weld.

[0039] Furthermore, in the above technical solution, the polypropylene woven fabric of the outer bag is cylindrical, located on the outer layer of the inner bag, in the middle layer, and reinforced with polypropylene woven fabric 18 at both ends.

[0040] Furthermore, in the above technical solution, the width of the outer bag is consistent with the outer dimensions of the liquid bag body, and the polypropylene woven fabric and the reinforced polypropylene woven fabric are sewn together with the inner bag and fixed by sewing, with a sewing line 19 at the sewing point.

[0041] Furthermore, in the above technical solution, the valve is a ball valve or a butterfly valve, the valve flange 20 is located in the middle of the inner bag, the valve body 21 is located outside the polypropylene woven fabric layer of the outer bag, and the valve is fixed to the container liquid bag body by bolts 22.

[0042] Furthermore, in the above technical solution, the valve specification is three inches or four inches to match the standard three-inch or four-inch quick-connect fittings.

[0043] Furthermore, in the above technical solution, the coated fabric, after being spliced, is in a tubular shape and is placed on the outside of the polypropylene woven fabric, located on the outermost layer.

[0044] Furthermore, in the above technical solution, the adjacent splices of the coated fabric are spliced ​​by lap welding, and the splices are provided with coated fabric strips 23.

[0045] Furthermore, in the above technical solution, a reinforcing layer 24 is welded to the outer bag near the valve position, and a cross or star-shaped opening 25 is opened on the surface of the reinforcing layer. The valve passes through the opening and is fixed with a hose clamp 26. The upper surface length of the short side of the outermost coated fabric is longer than the lower surface length.

[0046] The outer coating fabric is designed with a longer upper surface than lower surface at the short side to facilitate overlapping with the lower surface during welding.

[0047] Furthermore, in the above technical solution, the straps are made of flexible materials to mitigate the surging effect of liquid inside the container's liquid bag.

[0048] The following is a specific embodiment: The inner bag of the container liquid bag is made of two layers of polyethylene film, preferably high-density polyethylene (HDPE) or linear low-density polyethylene (LLDPE), with a single layer thickness ranging from 0.15 to 0.25 mm and a total thickness of 0.3 to 0.5 mm; the inner bag is made into a cylindrical shape, with an inner diameter of 2.3 to 2.35 m to match the internal width of the container, and a length of 11.9 to 12 m; both ends are formed into a sealed space by hot air welding, with the welding temperature controlled at 180 to 220°C, a welding width of 8 to 12 mm, and three parallel heat-sealing lines pressed at the weld, with a spacing of 3 to 5 mm and a depth of 0.05 to 0.1 mm, to ensure the weld is sealed.

[0049] The outer polypropylene woven fabric of the container bag has a tubular structure and is located outside the inner bag (middle layer). The woven fabric weight ranges from 180-220 g / m², and the warp and weft density is 16×16 threads / inch or 18×18 threads / inch. The inner diameter of the tubular fabric is 5-10 mm larger than the outer diameter of the inner bag, and its length is consistent with that of the inner bag. Reinforcing polypropylene woven fabric is set at both ends of the outer bag, with dimensions of 1.2-1.5 m in length and 2.3-2.35 m in width. Its weight is 30-50 g / m² higher than that of the middle layer woven fabric. It is fixed to the middle layer woven fabric and the inner bag by double-stitching. The stitching thread is high-strength polyester thread with a diameter of 0.5-0.8 mm and a stitch length controlled at 2-3 mm / stitch. The stitches form a... Double stitching with a spacing of 5-8mm; the coated fabric is made of PVC coated polyester or TPU coated nylon, with a coating thickness of 0.1-0.15mm and a base fabric weight of 150-180g / ㎡; after splicing, it is made into a cylindrical shape with an inner diameter of about 2.4-2.45m and a length of about 11.95-12.05m. High-frequency lap welding is used at adjacent splicing points, with an overlap width of 30-50mm. After splicing, a strip of coated fabric of the same material with a width of 50-60mm and a thickness of 0.2-0.3mm is pasted on the outside of the overlap, and reinforced by hot pressing; the upper surface of the short side of the coated fabric is 15-20mm longer than the lower surface to facilitate alignment with the lower surface during welding.

[0050] Preferably, the valve can be a Q41F-16 ball valve or a D71X-16 butterfly valve, made of 304 stainless steel; the specifications are divided into two types according to the actual liquid injection and drainage needs, one is DN80, which is compatible with standard 3-inch quick couplings, and the other is DN100, which is compatible with standard 4-inch quick couplings; the installation method is as follows: the valve flange is located in the middle of the inner bag, and the flange is fixed to the inner bag by heat fusion welding; the valve body passes through the polypropylene woven fabric layer of the outer bag, and the flange is fixed to the outer bag by 4-6 M8×20mm stainless steel bolts; a reinforcing layer is welded to the outer bag near the valve position, and the surface of the reinforcing layer has a cross-shaped or star-shaped opening, the opening diameter of which is 2-3mm larger than the outer diameter of the valve body; after the valve passes through, a stainless steel hose clamp is fitted between the valve body and the reinforcing layer, and the hose clamp is tightened to prevent the valve from loosening.

[0051] The straps are made of flexible polyester fiber, 25-30mm wide, 1.5-2mm thick, with a tensile strength ≥5kN. There are 8-12 sets, which are fixed at equal intervals on the outside of the outer bag, with a spacing of 1-1.2m between each set. The two ends of the straps are fixed to the polypropylene woven fabric of the outer bag by sewing, with a sewing length of 50-60mm and a stitch spacing of 2mm / stitch. An adjustment buckle can be set in the middle of each set of straps to adjust the tightness of the straps according to the filling degree of the liquid bag, further reducing the liquid flow.

[0052] In this embodiment, each parameter can be finely adjusted according to the density of the actual transported liquid. For example, when transporting high-density liquid, the thickness of the inner bag can be selectively increased and the number of straps can be increased to 12-14 sets to ensure that the load-bearing performance of the liquid bag meets the standards.

[0053] Specifically, the principle of this utility model is as follows: During the loading and unloading stage, a valve located at the upper end of one side of the bag connects to a quick-connect structure to complete the liquid loading. The valve flange is centrally positioned and fixed with bolts to ensure even force distribution and leak-proof sealing during loading and unloading. During transportation, the outer bag's polypropylene woven fabric and coated fabric withstand external friction and impact, while the inner bag prevents liquid leakage. Multiple sets of equidistant flexible straps deform slightly with the flow of liquid, buffering the impact force to mitigate the surging effect. The reinforcing layer around the valve and the hose clamp prevent the valve from loosening due to bumps. During unloading, opening the valve allows for rapid liquid discharge. The entire process relies on the coordinated functions of all components to achieve safe and efficient transportation of non-hazardous liquids within a 40-foot container.

Claims

1. A liquid bag for transporting in a 40-foot container, characterized in that, The container liquid bag includes a container liquid bag body, a valve for loading and unloading liquids, and straps for securing the container liquid bag. The container liquid bag body includes an inner bag and an outer bag. The inner bag is composed of one or more layers of polyethylene or polyethylene copolymer. The outer bag is composed of one layer of polypropylene woven fabric and one layer of coated fabric. The valve is located on the upper side of one side of the container liquid bag body. The straps are fixed to the outer side of the outer bag of the container liquid bag body in multiple sets at equal intervals.

2. The liquid bag for transporting in a 40-foot container according to claim 1, characterized in that, The inner bag is a cylindrical film with both ends welded together to form a sealed space, and the welded joint has a heat seal line.

3. A liquid bag for transporting in a 40-foot container according to claim 2, characterized in that, The outer bag is made of tubular polypropylene woven fabric, located on the outer layer of the inner bag and in the middle layer, with reinforcing polypropylene woven fabric at both ends.

4. A liquid bag for transporting in a 40-foot container according to claim 3, characterized in that, The width of the outer bag is consistent with the outer dimensions of the liquid bag body. The polypropylene woven fabric and the reinforced polypropylene woven fabric are sewn to the inner bag and fixed with a sewing line.

5. A liquid bag for transporting in a 40-foot container according to claim 4, characterized in that, The valve is a ball valve or a butterfly valve. The valve flange is located in the middle of the inner bag, and the valve body is located outside the polypropylene woven fabric layer of the outer bag. The valve is fixed to the container liquid bag body by bolts.

6. A liquid bag for transporting in a 40-foot container according to claim 5, characterized in that, The valve is available in 3-inch or 4-inch sizes to match standard 3-inch or 4-inch quick-connect fittings.

7. A liquid bag for transporting in a 40-foot container according to claim 6, characterized in that, The coated fabric, after being spliced ​​together, is in a tubular shape and is placed on the outside of the polypropylene woven fabric, located at the outermost layer.

8. A liquid bag for transporting in a 40-foot container according to claim 7, characterized in that, The adjacent joints of the coated fabric are joined by lap welding, and a strip of coated fabric is provided at the joint.

9. A liquid bag for transporting in a 40-foot container according to claim 8, characterized in that, The outer bag is welded with a reinforcing layer near the valve. The surface of the reinforcing layer has a cross or star-shaped opening. The valve passes through the opening and is fixed with a hose clamp. The upper surface of the short side of the outermost coated fabric is longer than the lower surface.

10. A liquid bag for transporting in a 40-foot container according to claim 9, characterized in that, The straps are made of flexible material to mitigate the surging effect of liquid inside the container's liquid bag.

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