Flexible pressure vessel

Abstract

The present application relates to a kind of soft pressure vessel, including material bag, the material bag includes cylindrical bag body and the end cap of two ends, the cylindrical bag body includes multiple annular bands, the edge of adjacent annular band is fixedly arranged by overlapping and melting pressure bonding, the edge of the end cap is fixedly arranged by overlapping and melting pressure bonding with the outer edge of the annular band on the two sides of cylindrical bag body, the annular band and end cap are all formed by the composite layer of the fiber layer in the middle and the rubber layer fixedly arranged by melting pressure bonding on the two sides of fiber layer.Construction of the present application is used to form the multiple annular bands of cylindrical bag body and the end cap, and the composite layer of the fiber layer in the middle and the rubber layer fixedly arranged by melting pressure bonding on the two sides of fiber layer, good sealing, and strength is greatly increased, can withstand gas pressure comparable to iron can, and the weight of material bag is exponentially decreased, even some material bags meeting the use requirements are only several dozens of kilograms, greatly reduce the requirement of carrying capacity of vehicle.

Description

Technical Field

[0001] This invention belongs to the technical field of transportation equipment for granular and powdered materials, and particularly relates to a flexible pressure vessel. Background Technology

[0002] Most granular and powdery materials are transported by vehicle. However, due to the long vehicle body and the fact that solid materials are less fluid than liquid materials, a problem arises during loading: the material accumulates below the loading port. For materials with slightly poorer fluidity, such as cement and grain, after loading a certain amount of material, the vehicle needs to drive around on uneven roads to allow the material to self-level under vibration before continuing loading, resulting in very low efficiency. Unloading also presents problems such as incomplete unloading and easy blockage of the discharge port. To facilitate loading and unloading, existing technologies involve setting up a fluidized bed at the bottom of the tank. During loading and unloading, air is injected into the tank to boil the material, increasing its fluidity and allowing it to automatically equalize within the tank. The inflation pressure typically needs to be 3-6 kg / cm², or 0.3-0.6 MPa. Therefore, the tank needs to have a strong pressure-bearing capacity. Currently, iron tanks are used, typically weighing around 20 tons. If material bags were used, the same capacity bag would only weigh tens of kilograms, significantly reducing the vehicle's load-bearing capacity requirements. However, ordinary material bags cannot withstand the air pressure required for fluidized bed operation.

[0003] Designing a flexible pressure vessel that can hold materials and has the pressure-bearing capacity required for use with fluidized beds is a pressing technical problem that needs to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a flexible pressure vessel to solve the above-mentioned technical problems.

[0005] The technical solution adopted in this invention is as follows:

[0006] A flexible pressure vessel includes a material bag, the material bag comprising a cylindrical bag body and end caps at both ends, the cylindrical bag body comprising a plurality of annular bands, the edges of adjacent annular bands being overlapped and fused together for fixation, the edges of the end caps being overlapped and fused together with the outer edges of the annular bands on both sides of the cylindrical bag body, the annular bands and the end caps being composed of a composite layer formed by a central fiber layer and rubber layers fused together and fixed on both sides of the fiber layer.

[0007] Preferably, the fiber layer is an aramid layer, a cord layer, a canvas layer, or a blended layer.

[0008] Preferably, the fiber layer is an aramid layer made of aramid 1414 fiber.

[0009] Preferably, the blended layer is composed of aramid 1414 fibers and nylon fibers arranged alternately in both the warp and weft directions.

[0010] Preferably, the thickness of the fiber layer is 0.4 mm to 1.0 mm, and the thickness of the composite layer is 1.1 mm to 2.0 mm.

[0011] Preferably, the material bag has a mesh fiber skeleton at the inlet to strengthen the inlet structure, and the mesh fiber skeleton is fused and pressed onto the material bag.

[0012] Preferably, a feed inlet sealing unit is provided below the feed inlet of the material bag. The feed inlet sealing unit includes a first winding machine fixed on one side below the feed inlet, a sealing cloth wound on the first winding machine for sealing the feed inlet, and a torsion spring winding reel or a second winding machine fixed on the other side below the feed inlet. The sealing cloth is made of the composite layer, and the other end of the sealing cloth is connected by a first pull rope wound on the torsion spring winding reel or the second winding machine.

[0013] Preferably, a first soft magnetic strip is fixed on the outer surface of the material bag around the feed inlet, and a second soft magnetic strip is fixed on the lower surface of the sealing cloth to cooperate with the first soft magnetic strip. The first and second soft magnetic strips are the same in shape and size, and a foam rubber ring is fixed on the upper surface of the sealing cloth at the position corresponding to the second soft magnetic strip.

[0014] Preferably, the material bag has an inlet sealing unit below the inlet, which includes a sealing cloth below the inlet. A first soft magnetic strip is fixed to the outer surface of the material bag around the inlet, and a second soft magnetic strip is fixed to the lower surface of the sealing cloth to cooperate with the first soft magnetic strip. The first and second soft magnetic strips are identical in shape and size. A foam rubber ring is fixed to the upper surface of the sealing cloth at the position corresponding to the second soft magnetic strip. Two perforations are provided on the magnetic strips at both ends of the first soft magnetic strip. The sealing cloth is rectangular, with one side fixed to the cylindrical bag body to form a fixed end. Opposite to the fixed end is the free end of the sealing cloth. Two rows of hanging rings are provided on the upper surface of the sealing cloth. Both rows of hanging rings are arranged along the direction from the fixed end of the sealing cloth to the free end of the sealing cloth. The two end rings of the two rows of hanging rings are respectively located on the foam rubber rings. The two horizontal hanging rings located at the free end of the sealing cloth are fixed with second pull ropes. The second pull ropes pass upward through the corresponding perforations. The two horizontal hanging rings located at the free end of the sealing cloth are fixed with third pull ropes. Each third pull rope passes through the other hanging rings in the same row and exits from the corresponding perforation above the fixed end of the sealing cloth.

[0015] Preferably, the outer side of the material bag is wrapped with an explosion-proof net made of nylon tape.

[0016] This invention discloses a flexible pressure vessel, which comprises multiple annular bands forming a cylindrical bag body and end caps, all composed of a composite layer formed by a central fiber layer and rubber layers fused and pressed to both sides of the fiber layer. This results in excellent sealing performance and significantly increased strength, enabling it to withstand gas pressure comparable to that of an iron canister, while the weight of the material bag decreases exponentially. Some material bags meeting usage requirements weigh only tens of kilograms, greatly reducing costs and lowering the load-bearing capacity requirements of vehicles. In addition to transporting granular and powdered materials, this flexible pressure vessel can also be used to transport liquid materials.

[0017] Furthermore, the fiber layer is an aramid layer made of aramid 1414 fiber, which utilizes the excellent compressive and tensile strength of the aramid layer made of aramid 1414 fiber.

[0018] Furthermore, the blended layer is composed of aramid 1414 fibers and nylon fibers arranged alternately in both the warp and weft directions. This structure further considers safety protection. Since aramid 1414 fibers have excellent compressive and tensile strength, they serve as the main pressure-bearing force. In scenarios where the pressure exceeds the pressure-bearing capacity of aramid 1414 fibers, the aramid 1414 fibers will break, while the nylon fibers and rubber layer will be stretched. As the rubber layer thins or even tears, gas leakage will eventually occur. In this way, the material bag is prevented from exploding, and safety is greatly enhanced.

[0019] Furthermore, the mesh fiber skeleton at the feed inlet is used to strengthen the feed inlet structure and prevent the feed inlet from tearing under pressure. At the same time, the mesh fiber skeleton has mesh holes, which does not affect the feeding.

[0020] Furthermore, an inlet sealing unit is provided below the inlet of the material bag. During feeding, the sealing cloth is wound by the first winding machine to expose the inlet. During unloading, the first pull rope is wound by the torsion spring winding reel or the second winding machine to pull the sealing cloth below the inlet. At the moment when the fluidized bed inflates the material bag, the sealing cloth is pressed to the bottom of the inlet, sealing and blocking the inlet. Due to the positioning of the sealing cloth by the first winding machine and the torsion spring winding reel or the second winding machine, as well as the obstruction of the mesh fiber skeleton, the sealing cloth is prevented from being pressed out of the inlet and prevented from flying out of the inlet.

[0021] Furthermore, by setting a first and a second soft magnetic strip, the sealing cloth is clamped onto the material bag when the feed inlet is blocked, making it more stable and providing better sealing performance. A foam rubber ring is fixed on the upper surface of the sealing cloth at the position corresponding to the second soft magnetic strip, which further increases the sealing performance.

[0022] Furthermore, another type of feed inlet sealing unit, before the fluidized bed inflates the material bag, pulls the second rope to extend the sealing cloth and cover the feed inlet. At the same time, the first and second soft magnetic strips clamp the sealing cloth onto the material bag to achieve a seal. During feeding, pulling the third rope folds and squeezes the sealing cloth to one side of the feed inlet, facilitating feeding. The structure is simple and very practical.

[0023] Furthermore, the outer side of the material bag is wrapped with an explosion-proof mesh made of nylon tape, which provides secondary reinforcement to the material bag, greatly enhancing its pressure resistance and further preventing the material bag from exploding. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the material bag structure of the flexible pressure vessel in Embodiment 1 of the present invention;

[0025] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0026] Figure 3 For the present invention Figure 1 Schematic diagram of the BB section structure;

[0027] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point C;

[0028] Figure 5 This is a schematic diagram of the flexible pressure vessel in Embodiment 1 of the present invention;

[0029] Figure 6 This is a schematic diagram of another inlet sealing unit according to an embodiment of the present invention.

[0030] The components are as follows: 1. Material bag; 2. Torsion spring winding reel; 3. Feed inlet; 4. First winding machine; 5. Cylindrical bag body; 6. End cap; 7. Rubber layer; 9. Fiber layer; 10. Explosion-proof mesh; 11, 12. Fixing ring; 13. Sealing cloth; 14. First pull rope; 15. Foam rubber ring; 16. First soft magnetic strip; 17. Second soft magnetic strip; 18. Second pull rope; 19. Third pull rope; 20. Hanging ring; 21. Mesh fiber skeleton. Detailed Implementation

[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] Example 1

[0033] A flexible pressure vessel, such as Figure 1-5 As shown, the material bag includes a material bag 1, which comprises a cylindrical bag body 5 and end caps 6 at both ends. The cylindrical bag body includes multiple annular bands, with the edges of adjacent annular bands overlapping and fused together for fixation. The edges of the end caps overlap and fused together with the outer edges of the annular bands on both sides of the cylindrical bag body, with an overlap width of at least 10 cm. In this embodiment, the overlap width is 10 cm. The annular bands and end caps are composed of a composite layer formed by a central fiber layer 8 and rubber layers 7 and 9 fused together and fixed on both sides of the fiber layer. The fiber layer is an aramid layer, a cord layer, a canvas layer, or a blended layer. In this embodiment, a blended layer is used, which is composed of aramid 1414 fibers and nylon fibers arranged alternately in both the warp and weft directions. The thickness of the fiber layer is 0.4 mm-1.0 mm, and the thickness of the composite layer is 1.1 mm-2.0 mm. In this embodiment, the thickness of the fiber layer is 0.6 mm, and the thickness of the composite layer is 1.4 mm.

[0034] A double-layer structure is formed by fusion-pressing a fixed annular band on the outer circumference of the central part of the cylindrical bag. During inflation, the pressure on the material bag gradually decreases from the center to both sides. The double-layer structure formed by fusion-pressing a fixed annular band on the outer circumference of the central part of the cylindrical bag strengthens the concentrated pressure-bearing areas and effectively protects the material bag.

[0035] In this embodiment, a mesh fiber skeleton 21 for reinforcing the inlet structure is provided at the material bag's inlet. The mesh fiber skeleton is manufactured as follows: a conical expanding rod is used to expand holes in the aramid 1414 fiber cloth; then, rubber layers are placed on both sides of the aramid 1414 fiber cloth; these layers are then heated, melted, and pressed onto the fiber cloth; finally, the rubber layers at the expanded holes are removed to form the mesh fiber skeleton. The mesh fiber skeleton is melted and pressed onto the material bag. The mesh width of the mesh fiber skeleton is 0.5 mm-1 mm; in this embodiment, 0.5 mm is used. The mesh fiber skeleton at the inlet in this embodiment is used to reinforce the inlet structure and prevent tearing under pressure. Simultaneously, the mesh fiber skeleton has holes, which does not affect the feeding process.

[0036] A material bag has an inlet sealing unit below the inlet 3. The inlet sealing unit includes a first winding machine 4 fixed on one side below the inlet, a sealing cloth 13 wound on the first winding machine for sealing the inlet, and a torsion spring winding reel or a second winding machine fixed on the other side below the inlet. The sealing cloth is made of a composite layer. The other end of the sealing cloth is connected by a first pull rope 14 wound on the torsion spring winding reel or the second winding machine. In this embodiment, the torsion spring winding reel is 2.

[0037] A first soft magnetic strip 16 is fixed around the outer surface of the material bag around the inlet. A second soft magnetic strip 17, which cooperates with the first soft magnetic strip, is fixed on the lower surface of the sealing cloth. The first and second soft magnetic strips are identical in shape and size. A foam rubber ring 15 is fixed on the upper surface of the sealing cloth at the position corresponding to the second soft magnetic strip. The first and second soft magnetic strips ensure that when the inlet is sealed, they clamp the sealing cloth onto the material bag, resulting in greater stability and better sealing performance. The foam rubber ring fixed on the upper surface of the sealing cloth at the position corresponding to the second soft magnetic strip further enhances the sealing performance.

[0038] The outer side of the material bag 1 is wrapped with an explosion-proof mesh 10 made of nylon tape. The mesh openings of the explosion-proof mesh corresponding to the cylindrical bag body 5 are quadrilateral, triangular, or circular. The mesh openings of the explosion-proof mesh 10 corresponding to the end cap 6 are also quadrilateral, triangular, or circular. In this embodiment, the mesh openings of the explosion-proof mesh corresponding to the cylindrical bag body are squares within quadrilaterals, with each square being 4cm wide and relatively dense. Two fixing rings 11 and 12 are provided on the end cap. The nylon tape of the explosion-proof mesh 10 is alternately connected to the fixing rings 11 and 12, forming multiple quadrilateral squares to prevent the nylon tape from being too dense in the center of the end cap and difficult to fix. The width of the nylon tape is 5cm-7cm, and the thickness is 1mm-2mm. In this embodiment, the thickness is set to 1mm and the width to 5cm according to actual needs.

[0039] The present invention discloses a flexible pressure vessel, which is composed of multiple annular bands forming a cylindrical bag body and end caps, all of which are composed of a composite layer formed by a central fiber layer and rubber layers fused and pressed to both sides of the fiber layer. It has good sealing performance and greatly increased strength, and can withstand gas pressure comparable to that of an iron can, while the weight of the material bag is reduced exponentially. Some material bags that meet the usage requirements weigh only tens of kilograms, which greatly reduces costs and also reduces the requirements for the load-bearing capacity of vehicles.

[0040] The blended layer is composed of aramid 1414 fibers and nylon fibers arranged alternately in both the warp and weft directions. This structure further considers safety protection. Because aramid 1414 fibers have excellent compressive and tensile strength, they serve as the main pressure-bearing force. In scenarios where the pressure exceeds the pressure-bearing capacity of aramid 1414 fibers, the aramid 1414 fibers will break, while the nylon fibers and the rubber layer will be stretched. As the rubber layer thins or even tears, gas leakage will eventually occur. In this way, the material bag is prevented from exploding, and safety is greatly enhanced.

[0041] In addition, a sealing unit is provided below the inlet of the material bag. During feeding, the sealing cloth is wound by the first winding machine to expose the inlet. During unloading, the first pull rope is wound by the torsion spring winding reel or the second winding machine to pull the sealing cloth below the inlet. At the moment when the fluidized bed inflates the material bag, the sealing cloth is pressed to the bottom of the inlet, sealing and blocking the inlet. Due to the positioning of the sealing cloth by the first winding machine and the torsion spring winding reel or the second winding machine, as well as the obstruction of the mesh fiber skeleton, the sealing cloth is prevented from being pressed out of the inlet and prevented from flying out of the inlet.

[0042] The outer side of the material bag is wrapped with an explosion-proof net made of nylon tape, which provides secondary reinforcement to the material bag, greatly enhancing its pressure resistance and further preventing the material bag from exploding.

[0043] Example 2

[0044] Unlike the embodiments described above, as Figure 6As shown, the inlet sealing unit includes a sealing cloth 13 below the inlet. A first soft magnetic strip 16 is fixed to the outer surface of the material bag around the inlet. A second soft magnetic strip 17 is fixed to the lower surface of the sealing cloth to cooperate with the first soft magnetic strip. The first and second soft magnetic strips are identical in shape and size. A foam rubber ring 15 is fixed to the upper surface of the sealing cloth at the position corresponding to the second soft magnetic strip. Two perforations are provided on the magnetic strips at both ends of the first soft magnetic strip. The sealing cloth is rectangular. One side of the sealing cloth is fixed to the cylindrical bag body to form the fixed end of the sealing cloth. The opposite side of the fixed end of the sealing cloth is the free end of the sealing cloth. Two rows of hanging rings 20 are provided on the upper surface of the sealing cloth. Both rows of hanging rings are arranged along the direction from the fixed end of the sealing cloth to the free end of the sealing cloth. The two end rings of the two rows of hanging rings are respectively located on the foam rubber ring. The two horizontal hanging rings located at the free end of the sealing cloth are fixed with second pull ropes 18. The second pull ropes pass upward through the corresponding perforations. Two horizontal hanging rings located at the free end of the sealing cloth are each fixed with a third pull rope 19. Each third pull rope passes through the other hanging rings in the same row and exits from the corresponding perforation above the fixed end of the sealing cloth. In this inlet sealing unit, before the fluidized bed inflates the material bag, pulling the second pull rope causes the sealing cloth to extend and cover the inlet. Simultaneously, the first and second soft magnetic strips clamp the sealing cloth onto the material bag, achieving a seal. During feeding, pulling the third pull rope folds and compresses the sealing cloth to one side of the inlet, facilitating feeding. The structure is simple and highly practical.

[0045] In other embodiments, unlike the embodiments described above, the portion of the explosion-proof mesh corresponding to the cylindrical bag body has mesh openings that gradually increase in size from the center to both sides along the axial direction. During inflation, the pressure on the material bag gradually decreases from the center to both sides. The gradually increasing mesh openings along the axial direction strengthen the structure of the pressure-bearing areas, effectively protecting the material bag. In other embodiments, unlike the embodiments described above, the portion of the explosion-proof mesh 10 corresponding to the end cap 6 has a square grid pattern within a quadrilateral mesh.

[0046] In other embodiments, unlike the embodiments described above, the fiber layer is an aramid layer made of aramid 1414 fiber, which utilizes the excellent compressive and tensile strength of the aramid layer made of aramid 1414 fiber.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flexible pressure vessel, characterized in that: The product includes a material bag comprising a cylindrical bag body and end caps at both ends. The cylindrical bag body includes multiple annular bands, with the edges of adjacent annular bands overlapping and fused together for fixation. The edges of the end caps overlap and fused together with the outer edges of the annular bands on both sides of the cylindrical bag body. The annular bands and end caps are all composed of a composite layer formed by a central fiber layer and rubber layers fused together and fixed on both sides of the fiber layer. A mesh fiber skeleton for reinforcing the inlet structure is provided at the material bag's inlet, and the mesh fiber skeleton is fused together and pressed onto the material bag. An inlet sealing unit is provided below the inlet of the material bag, and the inlet sealing unit includes... The package includes a first winding machine fixed to one side below the feed inlet, a sealing cloth wound on the first winding machine to seal the feed inlet, and a torsion spring winding reel or a second winding machine fixed to the other side below the feed inlet. The sealing cloth is made of the composite layer, and the other end of the sealing cloth is connected by a first pull rope wound on the torsion spring winding reel or the second winding machine. A first soft magnetic strip is fixed to the outer surface of the material bag around the feed inlet, and a second soft magnetic strip is fixed to the lower surface of the sealing cloth to cooperate with the first soft magnetic strip. The first and second soft magnetic strips are the same in shape and size. A foam rubber ring is fixed to the upper surface of the sealing cloth at the position corresponding to the second soft magnetic strip.

2. A flexible pressure vessel according to claim 1, characterized in that: The fiber layer is an aramid layer, a canvas layer, or a blended layer.

3. A flexible pressure vessel according to claim 2, characterized in that: The fiber layer is an aramid layer made of aramid 1414 fiber.

4. A flexible pressure vessel according to claim 2, characterized in that: The blended layer is composed of aramid 1414 fibers and nylon fibers arranged alternately in both the warp and weft directions.

5. The flexible pressure vessel according to any one of claims 1-4, characterized in that: The outer side of the material bag is wrapped with an explosion-proof net made of nylon tape.

6. A flexible pressure vessel, characterized in that: The product includes a material bag comprising a cylindrical bag body and end caps at both ends. The cylindrical bag body includes multiple annular bands, with the edges of adjacent annular bands overlapping and fused together for fixation. The edges of the end caps overlap and fused together with the outer edges of the annular bands on both sides of the cylindrical bag body. Both the annular bands and the end caps are composed of a composite layer formed by a central fiber layer and rubber layers fused together and fixed on both sides of the fiber layer. A mesh fiber skeleton for reinforcing the inlet structure is provided at the material bag's inlet, and this mesh fiber skeleton is fused together with the material bag. An inlet sealing unit is provided below the inlet, comprising a sealing cloth below the inlet. A first soft magnetic strip is fixed to the outer surface of the material bag around the inlet, and a second soft magnetic strip for engaging with the first soft magnetic strip is fixed to the lower surface of the sealing cloth. The first and second soft magnetic strips are identical in shape and size. A foam rubber ring is fixed to the upper surface of the sealing cloth at a position corresponding to the second soft magnetic strip. Two perforations are provided on both ends of the first soft magnetic strip. The sealing cloth is rectangular, and one side of the sealing cloth is fixed to the cylindrical bag body to form the fixed end of the sealing cloth. Opposite to the fixed end of the sealing cloth is the free end of the sealing cloth. Two rows of hanging rings are provided on the upper surface of the sealing cloth. Both rows of hanging rings are arranged in the direction from the fixed end of the sealing cloth to the free end of the sealing cloth. The two end rings of the two rows of hanging rings are respectively located on the foam rubber ring. The two horizontal hanging rings located at the free end of the sealing cloth are fixed with a second pull rope. The second pull rope passes upward through the corresponding perforation. The two horizontal hanging rings located at the free end of the sealing cloth are fixed with a third pull rope. Each third pull rope passes through the other hanging rings in the same row and exits from the corresponding perforation above the fixed end of the sealing cloth.

7. A flexible pressure vessel according to claim 6, characterized in that: The fiber layer is an aramid layer, a canvas layer, or a blended layer.

8. A flexible pressure vessel according to claim 7, characterized in that: The fiber layer is an aramid layer made of aramid 1414 fiber.

9. A flexible pressure vessel according to claim 7, characterized in that: The blended layer is composed of aramid 1414 fibers and nylon fibers arranged alternately in both the warp and weft directions.

10. The flexible pressure vessel according to any one of claims 6-9, characterized in that: The outer side of the material bag is wrapped with an explosion-proof net made of nylon tape.

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