Internal force-bearing air bag based on combination of water-soluble cloth and pull rope and preparation method of internal force-bearing air bag

Abstract

The invention provides an internal force-bearing air bag based on combination of water-soluble cloth and a pull rope and a preparation method of the internal force-bearing air bag. The internal force-bearing air bag comprises the water-soluble cloth 1, the pull rope 2 and an air bag body 3. The water-soluble cloth 1 is made of a water-soluble non-woven material and serves as an initial positioning layer of the pull rope, and an arrangement path of the pull rope 2 is preset on the surface of the water-soluble cloth 1; the pull rope 2 is made of a non-water-soluble fiber material and connected with the interior of the air bag 3, the pull rope 2 is further fixed to the arrangement path, and the pull rope 2 and the pull rope 2 form a force bearing combination body; the air bag 3 is made of a flexible airtight material, and a force bearing assembly is fixed in the air bag 3; wherein the water-soluble cloth 1 is dissolved in water after the air bag 3 is inflated, and the pull rope 2 is reserved to serve as an air bag force bearing structure. The water-soluble cloth is used as a pull rope positioning tool, only the pull rope is reserved as a force bearing structure after dissolution, and the water-soluble cloth has the advantages of being light in weight, environmentally friendly, rapid in assembly and the like.

Description

Technical Field

[0001] This application belongs to the technical field of internal load-bearing airbags, and particularly relates to an internal load-bearing airbag based on the combination of water-soluble cloth and drawstrings and its preparation method. Background Art

[0002] Airbags have many uses and can be widely used in daily life. They can also be applied to other fields such as ship launching and docking, heavy object handling, pneumatic shield dams, and deep-sea salvage. In daily life, for example, airbags in cars, airbags for ship launching and docking in production, salvage airbags in rescue operations, and so on.

[0003] Traditionally, the inner part of an airbag either uses a skin material as the surface structure of the load-bearing partition. Although this structure can provide sufficient support force, it has problems such as heavy weight and complex manufacturing. Moreover, traditional airbag materials are not biodegradable and are prone to causing environmental pollution after being discarded.

[0004] The above statements are only used to provide background technical information related to this application. Unless otherwise indicated, the content described in this part is not prior art for other parts of this application. Summary of the Invention

[0005] The internal load-bearing airbag based on the combination of water-soluble cloth and drawstrings and its preparation method proposed by the present invention use water-soluble cloth as a drawstring positioning tool and only retain the drawstrings as the load-bearing structure after dissolution, belonging to lightweight structure design and the application of environmentally friendly materials, and solving at least one of the above-mentioned technical problems.

[0006] According to the first aspect of the embodiments of the present application, an internal load-bearing airbag based on the combination of water-soluble cloth and drawstrings is provided, including water-soluble cloth 1, drawstrings 2, and an airbag 3;

[0007] Water-soluble cloth 1: Made of water-soluble non-woven materials, it serves as the initial positioning layer for the drawstrings, and the layout path of the drawstrings 2 is preset on the surface;

[0008] Drawstrings 2: Made of water-insoluble fiber materials, they are connected to the inside of the airbag 3, and the drawstrings 2 are also fixed on the layout path to form a load-bearing combination with the drawstrings 2;

[0009] Airbag 3: Made of flexible airtight materials, and the load-bearing combination is fixed inside it;

[0010] Among them, the water-soluble cloth 1 dissolves in water after the airbag 3 is inflated, and the drawstrings 2 are retained as the airbag load-bearing structure.

[0011] In some embodiments of the present application, a pre-tightening force is also set on the drawstrings 2 and then fixed on the layout path, and the pre-tightening force is positively correlated with the airbag load-bearing strength.

[0012] In some embodiments of the present application, the pre-tightening force calculation steps include:

[0013] According to the usage scenario and load-bearing requirement of the airbag 3, determine the design load F (unit: N) of a single pulling rope, and the calculation formula is:

[0014]

[0015] where P is the load-bearing strength of the airbag; S is the load-bearing area of the pulling rope group; n is the number of pulling ropes, and θ is the angle between the pulling rope and the force-bearing direction;

[0016] The pre-tightening force F 预紧 The calculation formula is:

[0017] F 预紧 = F × a;

[0018] where a is a coefficient less than 1.

[0019] In some embodiments of the present application, setting the pre-tightening force on the pulling rope 2 specifically includes:

[0020] Fix the pulling rope on the drum of the tension winch, and set the pre-tightening force F of the pulling rope through the tension winch controller 预紧 ; drive the drum to rotate through an electric motor to tighten the pulling rope, and use a tension sensor to monitor that the tension of the pulling rope reaches F 预紧 ;

[0021] After the pre-tightening is completed, stop the electric motor to ensure that the pulling rope remains in the pre-tightened state, and cycle and load n times to ensure the stability of the pulling rope.

[0022] In some embodiments of the present application, the pulling rope adopts a high-strength non-water-soluble rope, and the high-strength non-water-soluble rope includes a high-molecular polyethylene rope material or aramid fiber, and the load-bearing breaking force of the pulling rope is not less than three times the design load F.

[0023] In some embodiments of the present application, the water-soluble cloth 1 adopts materials including PVA fiber, CMC fiber or PEO fiber materials; the water-soluble cloth 1 dissolves after encountering water, and the dissolution time of the water-soluble cloth 1 is controlled by adjusting the water temperature and the cloth thickness.

[0024] In some embodiments of the present application, the dissolution time t of the water-soluble cloth 1 satisfies the following formula:

[0025]

[0026] where h is the thickness of the water-soluble cloth; k is the dissolution rate constant; T is the water temperature; u is the water flow rate.

[0027] According to the second aspect of the embodiments of the present application, there is provided a preparation method of an internal load-bearing airbag based on the combination of a water-soluble cloth and a pulling rope according to any one of the above, including:

[0028] Pre-tightening guy wire 2: According to the load-bearing requirements of the airbag 3, the guy wire 2 is cyclically pre-tightened and loaded by a tension winch, and the pre-tightening force of the guy wire is a times the design load F;

[0029] Positioning guy wire 2: Preset the layout path of the guy wire on the surface of the water-soluble cloth 1, and fix the guy wire 2 on the water-soluble cloth 1 through hot pressing, sewing or water-soluble adhesive process to form a load-bearing combination;

[0030] Fixing combination: Fix both ends of the load-bearing combination of the water-soluble cloth 1 and the guy wire 2 to the inner surface of the airbag 3 through non-water-soluble adhesive or sewing process;

[0031] Inflation and dissolution: After inflating the airbag 3, inject water mist to dissolve the water-soluble cloth 1, and retain the guy wire 2 as the load-bearing structure.

[0032] In some embodiments of the present application, the water-soluble cloth 1 is made of PVA fiber, CMC fiber or PEO fiber material, the dissolution temperature is 20 - 50 °C, and the dissolution time is 1 - 10 minutes.

[0033] According to the third aspect of the embodiments of the present application, a lighter-than-air craft is provided, including the internal load-bearing airbag of any one of the above.

[0034] Using the internal load-bearing airbag based on the combination of water-soluble cloth and guy wire and its preparation method of the present application, the internal load-bearing airbag includes a water-soluble cloth 1, a guy wire 2 and an airbag 3; Water-soluble cloth 1: Made of water-soluble non-woven material, which serves as the initial positioning layer of the guy wire, and the layout path of the guy wire 2 is preset on the surface; Guy wire 2: Made of non-water-soluble fiber material, which is connected to the inside of the airbag 3, and the guy wire 2 is also fixed on the layout path to form a load-bearing combination with the guy wire 2; Airbag 3: Made of flexible airtight material, and the internal load-bearing combination is fixed therein; wherein, the water-soluble cloth 1 dissolves in water after the airbag 3 is inflated, and the guy wire 2 is retained as the airbag load-bearing structure.

[0035] The present application uses the water-soluble cloth as a guy wire positioning tool, and only retains the guy wire as the load-bearing structure after dissolution, which has the advantages of light weight, environmental protection, fast assembly, etc. It belongs to the technical field of lightweight structure design and application of environmental protection materials, and is suitable for the preparation of flexible inflatable structures such as lighter-than-air crafts, airships, and airbags. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0037] Figure 1 Shows a design schematic diagram of the guy wire cross design distributed on the water-soluble cloth according to the embodiments of the present application;

[0038] Figure 2 The structural schematic diagram of installing the water-soluble cloth and drawstring combination into the airbag according to an embodiment of the present application is shown;

[0039] Figure 3 The schematic diagram of the airbag with the drawstring bearing force after the water-soluble cloth is dissolved according to an embodiment of the present application is shown;

[0040] Figure 4 The design schematic diagram of the drawstring parallel design distributed on the water-soluble cloth according to an embodiment of the present application is shown;

[0041] Figure 5 Another structural schematic diagram of installing the water-soluble cloth and drawstring combination into the airbag according to an embodiment of the present application is shown;

[0042] Figure 6 Another schematic diagram of the airbag with the drawstring bearing force after the water-soluble cloth is dissolved according to an embodiment of the present application is shown;

[0043] Figure 7 The step schematic diagram of the preparation method of the internal load-bearing airbag based on the combination of the water-soluble cloth and the drawstring according to an embodiment of the present application is shown;

[0044] Figure 8 The structural schematic diagram of an aerostat according to an embodiment of the present application is shown. Detailed implementation manners

[0045] Regarding the present application, inside the traditional airbag, either the skin material is used as the surface structure of the load-bearing partition board. Although this structure can provide sufficient support force, there are problems such as large weight and complex manufacturing. Other commonly used airbags prepared by simple sewing processes generally have problems such as low strength, air leakage at the needle holes at the sewing joints, poor airtightness, and non-environmental protection, and cannot provide sufficient support force. It is difficult to be applied to fields such as aerostats and airships that require high strength, high pressure resistance, wear resistance, and long service life.

[0046] For example, the disclosed patent CN206623981U records a connection structure for an aerostat and an aerostat, which connects the inner surface of the airbag cut pieces through the skin material, and both ends of the skin material respectively form a "T"-shaped structure with the inner surface of the airbag cut pieces and are fixedly installed. Using the skin material as the surface load-bearing structure, it does not solve the problem of large weight of the load-bearing structure.

[0047] Therefore, with the increasing demand for lightweight and simplified processing, it is urgent to design a new type of load-bearing structure that can significantly reduce weight and simplify the manufacturing process while ensuring performance.

[0048] Regarding the water-soluble cloth of the present application: a non-woven lining cloth that can be dissolved in normal temperature water; an aerostat: a flying vehicle that is lighter than air and relies on atmospheric buoyancy to lift off.

[0049] As a backing cloth, the water-soluble cloth of the present application can assist in the positioning and installation of the drawstring on the inner surface of the airbag; as an environmentally friendly material, the water-soluble cloth has the property of dissolving in water, and combined with the lightweight wire structure formed by the drawstring, it can effectively replace the load-bearing surface structure made of traditional skin, realizing lightweight design. Specifically, it has the following beneficial effects:

[0050] 1) Compared with the traditional partition-style load-bearing surface structure, this structure combines the dissolution characteristics of the water-soluble cloth and only retains the wire structure form connected by the drawstring, saving a large amount of skin materials and realizing the lightweight of the airbag.

[0051] 2) The drawstring can be selected according to the load-bearing strength and weight requirements of the airbag, and its price is cheaper than that of using skin materials, which helps to save manufacturing costs.

[0052] 3) The processing and forming of this structure are simpler. Due to the nature of the rope material itself to transmit force, it has more flexibility and maintainability compared with the surface load-bearing structure of the skin material. The inner drawstring can be designed with different tensioning structures according to the special-shaped structure and usage requirements of the airbag.

[0053] 4) The water-soluble cloth in this structure serves as a positioning backing cloth, which can assist in the positioning and installation of the drawstring on the inner surface of the airbag, and is easily installed through stitching or adhesive bonding processes. The characteristics of the water-soluble cloth can dissolve in water, achieving environmental protection and no pollution.

[0054] 5) This structure and its preparation method are applicable to various fields requiring flexible inflatable structures. In addition to the applications mentioned above such as aerostats, airships, airbags, etc., it can be further extended to the following fields: a. Marine buoyancy devices, providing buoyancy and stability; b. Marine wind power buoyancy foundations, used as buoyancy support foundations for offshore wind power generation, reducing dependence on the seabed; c. Emergency air cushion rescue devices, used for high-rise building rescue to protect the safety of falling personnel. d. Inflatable castles, used for amusement facilities. e. Inflatable defensive works, providing temporary defensive capabilities.

[0055] The internal load-bearing airbag based on the combination of water-soluble cloth and drawstring and its preparation method of the present application, the internal load-bearing airbag includes a water-soluble cloth 1, a drawstring 2 and an airbag 3; water-soluble cloth 1: made of water-soluble non-woven material, which serves as the initial positioning layer of the drawstring, and the layout path of the drawstring 2 is preset on the surface; drawstring 2: made of water-insoluble fiber material, which is connected to the inside of the airbag 3, and the drawstring 2 is also fixed on the layout path to form a load-bearing combination with the drawstring 2; airbag 3: made of flexible airtight material, and the load-bearing combination is fixed inside it; wherein, the water-soluble cloth 1 dissolves in water after the airbag 3 is inflated, and the drawstring 2 is retained as the airbag load-bearing structure.

[0056] This application uses water-soluble fabric as a drawstring positioning tool. After dissolution, only the drawstring remains as the load-bearing structure, which has the advantages of lightweight, environmental protection, and rapid assembly. It belongs to the technical field of lightweight structure design and application of environmental protection materials, and is applicable to the preparation of flexible inflatable structures such as aerostats, airships, and airbags.

[0057] In order to make the technical solutions and advantages in the embodiments of this application clearer and more understandable, the following further details the exemplary embodiments of this application with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, rather than an exhaustive list of all embodiments. It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0058] Embodiment 1

[0059] Figure 2 shows a step diagram of an internal load-bearing airbag based on the combination of water-soluble fabric and drawstring according to an embodiment of this application. Figure 5 shows another structural schematic diagram of installing the combination of water-soluble fabric and drawstring into the airbag according to an embodiment of this application.

[0060] As Figure 2 and Figure 5 shown, an internal load-bearing airbag based on the combination of water-soluble fabric and drawstring includes a water-soluble fabric 1, a drawstring 2, and an airbag 3;

[0061] Water-soluble fabric 1: Made of water-soluble non-woven material, it serves as the initial positioning layer of the drawstring, and the layout path of the drawstring 2 is preset on the surface.

[0062] Drawstring 2: Made of water-insoluble fiber material, it is connected to the inside of the airbag 3, and the drawstring 2 is also fixed on the layout path to form a load-bearing combination with the drawstring 2.

[0063] Airbag 3: Made of flexible airtight material, and the load-bearing combination is fixed inside it.

[0064] Among them, the water-soluble fabric 1 dissolves in water after the airbag 3 is inflated, and only the drawstring 2 remains as the load-bearing structure of the airbag.

[0065] This application uses water-soluble fabric as a drawstring positioning tool. After dissolution, only the drawstring remains as the load-bearing structure, which has the advantages of lightweight, environmental protection, and rapid assembly.

[0066] Among them, the preset drawstring layout path on the surface of the water-soluble fabric is preferably a cross design or a parallel design.

[0067] Figure 1 shows a design schematic diagram of the cross design of the drawstring distributed on the water-soluble fabric according to an embodiment of this application. Figure 3 shows a schematic diagram of the airbag with the drawstring bearing the load after the water-soluble fabric is dissolved according to an embodiment of this application.

[0068] As shown Figure 1 in the figure, the preset arrangement path of the drawstring is a cross design, and the drawstring is fixedly arranged on the water-soluble cloth through a specific crossing. Finally, after the water-soluble cloth is dissolved, as shown Figure 3 in the figure, the drawstring 2 with the cross design is left as the airbag bearing structure.

[0069] Figure 4 The figure shows a design schematic diagram of the drawstring parallel design distributed on the water-soluble cloth according to an embodiment of the present application. Figure 6 The figure shows a schematic diagram of the airbag with the drawstring bearing after the water-soluble cloth is dissolved according to an embodiment of the present application.

[0070] As shown Figure 4 in the figure, the preset arrangement path of the drawstring is a parallel design, and the drawstring is fixedly arranged on the water-soluble cloth through a specific parallel arrangement. Finally, after the water-soluble cloth is dissolved, as shown Figure 6 in the figure, the drawstring 2 with the parallel design is left as the airbag bearing structure.

[0071] Furthermore, in the specific implementation, it further includes setting a pre-tightening force on the drawstring 2 and then fixing it on the arrangement path, and the pre-tightening force is positively correlated with the airbag bearing strength.

[0072] The pre-tightening force calculation steps include:

[0073] 1. According to the usage scenario and bearing requirements of the airbag 3, determine the design load F (unit: N) of a single drawstring. The calculation formula is:

[0074]

[0075] where P is the airbag bearing strength (unit: N / ㎡); S is the bearing area of the drawstring group (unit: ㎡); n is the number of drawstrings (unit: root), and θ is the angle between the drawstring and the bearing direction (unit: degree).

[0076] 2. The calculation formula of the pre-tightening force F 预紧 is:

[0077] F 预紧 = F × a;

[0078] where a is a coefficient less than 1. In the present application, it is preferably set that F 预紧 is set to 40% - 50% of the design load F.

[0079] In the preferred implementation manner, setting a pre-tightening force on the drawstring 2 specifically includes:

[0080] 1. Fix the drawstring on the drum of the tension winch, and set the drawstring pre-tightening force F 预紧 through the tension winch controller; drive the drum to rotate through the electric motor to tighten the drawstring, and use the tension sensor to monitor that the tension of the drawstring reaches F 预紧;

[0081] After the pre-tightening is completed, stop the electric motor to ensure that the pulling rope remains in the pre-tightened state, and cycle load it n times to ensure the stability of the pulling rope.

[0082] In the embodiment of the present application, the pulling rope adopts a high-strength non-water-soluble rope, and the high-strength non-water-soluble rope includes a high-molecular polyethylene rope material or aramid fiber. The load-bearing breaking force of the pulling rope is not less than three times the designed load F, that is, it is required that the breaking force of the pulling rope ≥ 300%F.

[0083] Next, during the process of dissolving the water-soluble cloth, inject water into the combined body bearing structure in the airbag 3 to dissolve the water-soluble cloth 1.

[0084] In some embodiments of the present application, the water-soluble cloth 1 is made of materials including PVA fiber, CMC fiber or PEO fiber material; the water-soluble cloth 1 dissolves when it meets water, and the dissolution time of the water-soluble cloth 1 is related to the water temperature and the cloth thickness. The dissolution time of the water-soluble cloth 1 is controlled by adjusting the water temperature and the cloth thickness.

[0085] Specifically, the dissolution time t of the water-soluble cloth 1 satisfies the following formula:

[0086]

[0087] Wherein, h: the thickness of the water-soluble cloth (unit: mm); k: the dissolution rate constant (unit: mm / (min·°C·m / s)); T: the water temperature (unit: °C); u: the water flow velocity (unit: m / s).

[0088] Considering a better dissolution rate and convenient actual use conditions, the material adopts PVA fiber with a faster dissolution efficiency.

[0089] When setting the water temperature, select a suitable water temperature T according to the dissolution formula. Use a heating device to adjust the water temperature to the set value.

[0090] Adjust the water flow velocity, and use a water pump or nozzle to adjust the water flow velocity u to ensure that the water flow velocity is evenly distributed.

[0091] When monitoring the dissolution process, optionally, use a sensor to monitor the water temperature, water flow velocity and dissolution time in real time. According to the monitoring results, adjust the water temperature and water flow velocity in time to ensure that the dissolution time meets the expectations.

[0092] In other preferred embodiments, the airbag 3 can be provided with a corresponding drainage cylinder to discharge the dissolved water-soluble cloth with the water, and only the pulling rope group is retained as the bearing structure.

[0093] The weight of the pulling rope in the present application is about 14% of the weight of the surface bearing structure. The weight calculation formula of the pulling rope group is:

[0094] m = ρ * L1 * n1;

[0095] Wherein, m is the weight of the drawstring (unit: g), ρ is the linear density of the drawstring (unit: g / m), L1 is the length of the drawstring (unit: m), and n1 is the number of inner drawstrings.

[0096] In summary, by using the water-soluble cloth of the embodiment of the present application as a lining cloth, it can assist in the positioning and installation of the drawstring on the inner surface of the airbag; as an environmentally friendly material, the water-soluble cloth has the property of dissolving in water, and combined with the lightweight wire structure formed by the drawstring, it can effectively replace the load-bearing surface structure made of traditional skin, realizing lightweight design. Specifically, it has the following beneficial effects:

[0097] 1) Compared with the traditional load-bearing surface structure in the form of a partition, this structure combines the dissolving property of the water-soluble cloth and only retains the wire structure form connected by the drawstring, saving a large amount of skin materials and realizing the lightweight of the airbag.

[0098] 2) The drawstring can be selected according to the required bearing strength and weight requirements of the airbag, and its price is cheaper than that of using skin materials, which helps to save manufacturing costs.

[0099] 3) The processing and forming of this structure are simpler. Due to the nature of the rope material itself in transmitting force, it has more flexibility and maintainability compared with the surface load-bearing structure of the skin material. The inner drawstring can be designed with different tensioning structures according to the special-shaped structure and usage requirements of the airbag.

[0100] 4) The water-soluble cloth in this structure serves as a positioning lining cloth, which can assist in the positioning and installation of the drawstring on the inner surface of the airbag, and can be simply installed through stitching or adhesive bonding processes. The property of the water-soluble cloth can dissolve in water, achieving environmental protection and no pollution.

[0101] 5) This structure and its preparation method are applicable to various fields requiring flexible inflatable structures. In addition to the applications such as aerostats, airships, and airbags mentioned above, it can be further extended to the following fields: a. Marine buoyancy devices, providing buoyancy and stability; b. Marine wind power buoyancy foundations, used as buoyancy support foundations for offshore wind power generation, reducing dependence on the seabed; c. Emergency air cushion rescue devices, used for high-rise building rescue to protect the safety of falling personnel. d. Inflatable castles, used for amusement facilities. e. Inflatable defensive fortifications, providing temporary defensive capabilities.

[0102] The internal load-bearing airbag based on the combination of water-soluble cloth and drawstring and its preparation method according to the present application, the internal load-bearing airbag includes a water-soluble cloth 1, a drawstring 2 and an airbag 3; Water-soluble cloth 1: Made of water-soluble non-woven materials, which serves as the initial positioning layer of the drawstring, and the arrangement path of the drawstring 2 is preset on the surface; Drawstring 2: Made of water-insoluble fiber materials, which is connected to the inside of the airbag 3, and the drawstring 2 is also fixed on the arrangement path to form a load-bearing combination with the drawstring 2; Airbag 3: Made of flexible airtight materials, and the load-bearing combination is fixed inside it; Among them, the water-soluble cloth 1 dissolves in water after the airbag 3 is inflated, and the drawstring 2 is retained as the airbag load-bearing structure.

[0103] The present application uses water-soluble cloth as a drawstring positioning tool, and only retains the drawstring as the load-bearing structure after dissolution, which has the advantages of light weight, environmental protection, fast assembly, etc. It belongs to the technical field of lightweight structure design and application of environmental protection materials, and is applicable to the preparation of flexible inflatable structures such as aerostats, airships, and airbags.

[0104] Example 2

[0105] The present embodiment provides a preparation method of an internal load-bearing airbag based on the combination of water-soluble cloth and drawstring. For details not disclosed in the preparation method of the internal load-bearing airbag based on the combination of water-soluble cloth and drawstring in this embodiment, please refer to the specific implementation content of the internal load-bearing airbag based on the combination of water-soluble cloth and drawstring in Embodiment 1.

[0106] Figure 7 The step schematic diagram of the preparation method of the internal load-bearing airbag based on the combination of water-soluble cloth and drawstring according to the embodiment of the present application is shown.

[0107] As Figure 7 shown, the preparation method of the internal load-bearing airbag based on the combination of water-soluble cloth and drawstring in the embodiment of the present application includes the following steps:

[0108] S101: Pre-tighten the drawstring 2: According to the load-bearing requirements of the airbag 3, the drawstring 2 is subjected to cyclic pre-tightening force loading through a tension winch, and the drawstring pre-tightening force is a times of the design load F; a is a coefficient less than 1.

[0109] S102: Position the drawstring 2: Preset the arrangement path of the drawstring on the surface of the water-soluble cloth 1, and fix the drawstring 2 on the water-soluble cloth 1 through hot pressing, sewing or water-soluble adhesive process to form a load-bearing combination;

[0110] S103: Fix the combination: Fix both ends of the load-bearing combination of the water-soluble cloth 1 and the drawstring 2 on the inner surface of the airbag 3 through water-insoluble adhesive or sewing process;

[0111] S104: Inflation and dissolution: After inflating the airbag 3, inject water mist to dissolve the water-soluble cloth 1, and retain the drawstring 2 as the load-bearing structure.

[0112] Preferably, the water-soluble cloth 1 is made of PVA fiber, CMC fiber or PEO fiber material, with a dissolution temperature of 20 - 50°C and a dissolution time of 1 - 10 minutes.

[0113] The implementation process of the preparation method is further described below.

[0114] The water-soluble cloth 1 serves as a positioning layer for the initial positioning of the drawstring 2. After the drawstring 2 is fixed to the airbag 3, the water-soluble cloth is dissolved.

[0115] The drawstring 2 serves as the main load-bearing structure. After being pre-tightened, it is arranged at a preset position on the water-soluble cloth 1. With the assistance of the water-soluble cloth 1 for positioning, the drawstring 2 is fixedly connected to the inner surface of the airbag 3.

[0116] The airbag 3 is made of a flexible airtight material (such as TPU-coated fabric), and the combination of the drawstring 2 and the water-soluble cloth 1 is arranged inside.

[0117] During specific preparation: First, according to the load-bearing requirements inside the airbag 3, the drawstring 2 is pre-tightened and loaded using a tension winch, and this is repeated 10 times.

[0118] Second, select the material for the water-soluble cloth 1, which is made by fixing the network with non-woven lining cloth such as PVA fiber, CMC fiber or PEO fiber material. The water-soluble cloth dissolves when it meets water, and the dissolution time depends on factors such as water temperature and cloth thickness.

[0119] Third, design the layout path on the water-soluble cloth. Draw lines on the surface of the water-soluble cloth 1 to mark the preset path for the drawstring layout. The path design is distributed according to the principle that the resultant force direction of the drawstring group is consistent with the required bearing capacity direction inside the airbag, such as Figure 1 the drawstring cross-distribution design shown and Figure 4 the drawstring parallel-distribution design shown.

[0120] Fourth, fix the drawstring. Through hot pressing or sewing or gluing (water-soluble glue) processes, the drawstring 2 is positioned and fixed along the designed path on the water-soluble cloth 1 to form a drawstring + water-soluble cloth combination.

[0121] Fifth, install the combination: Fix the rope ends at both ends of the combination to the inner surface of the airbag 3 through sewing or gluing (non-water-soluble glue) processes to form a surface load-bearing structure similar to a partition.

[0122] Sixth, install multiple airbags with load-bearing structures in sequence according to the processes in steps one to five.

[0123] Seventh, inflate and test: Inflate and test the airbag 3 to check the forming effect of the airbag and the stability of the load-bearing structure.

[0124] Eighth, dissolve the water-soluble cloth: Inject water into the combination load-bearing structure inside the airbag 3 to dissolve the water-soluble cloth 1.

[0125] Among them, the control process of the pre-tightening force of the pulling rope 2 in Step 1 is further described as follows:

[0126] It includes Step a) calculating the design load; b) selecting the pulling rope material; c) setting the pre-tightening force; d) pre-tightening and loading for 10 cycles.

[0127] a) According to the usage scenario and load-bearing requirement of the airbag 3, determine the design load F (unit: N) of a single pulling rope. The calculation formula: The calculation formula where P is the load-bearing strength of the airbag (unit: N / ㎡); S is the load-bearing area of the pulling rope group (unit: ㎡); n is the number of pulling ropes (unit: root), and θ is the angle between the pulling rope and the load-bearing direction (unit: degree).

[0128] b) Select the pulling rope material: Select a high-strength non-water-soluble rope, such as a high molecular weight polyethylene rope (UHMWPE) material or aramid fiber or other high-strength non-water-soluble ropes, and require that the breaking force of the pulling rope ≥ 300%F.

[0129] c) Pre-tightening force setting: Set the pre-tightening force F to 40% - 50% of the design load F.

[0130] d) Pre-tightening and loading: A conventional implementation method, such as using an electric tension winch. First, fix the pulling rope on the drum of the tension winch, and set the target value F of the pre-tightening force through the controller. The electric motor drives the drum to rotate to tighten the pulling rope. Use a tension sensor to monitor the tension of the pulling rope to ensure that the pre-tightening force meets the design requirements. Adjust the rotation speed of the electric motor through the controller to achieve precise control of the pre-tightening force. After the pre-tightening is completed, stop the electric motor to ensure that the pulling rope remains in the pre-tightened state. Load for 10 cycles to ensure the stability of the pulling rope.

[0131] Among them, the dissolution process of the water-soluble cloth 1 in Step 8 is further described as follows:

[0132] 11) Determine the water-soluble cloth material according to the dissolution formula.

[0133] The dissolution time t formula can be simplified as:

[0134] where h: the thickness of the water-soluble cloth (unit: mm); k: the dissolution rate constant (unit: mm / (min·℃·m / s)); T: the water temperature (unit: ℃); u: the water flow velocity (unit: m / s).

[0135] Considering a better dissolution rate and convenient actual usage conditions, the material uses PVA fiber with a faster dissolution efficiency.

[0136] 12) Set the water temperature: Select a suitable water temperature T according to the dissolution formula. Use a heating device to adjust the water temperature to the set value.

[0137] 13) Adjust the water flow rate: Use a water pump or nozzle to adjust the water flow rate u to ensure a uniform distribution of the water flow rate.

[0138] 14) Monitor the dissolution process: Use sensors to monitor the water temperature, water flow rate, and dissolution time in real time. According to the monitoring results, adjust the water temperature and water flow rate in a timely manner to ensure that the dissolution time meets the expectations.

[0139] Preferably, the airbag 3 can be provided with a corresponding drain tube to discharge the dissolved water-soluble cloth with the water, and only the drawstring group is retained as the load-bearing structure.

[0140] The weight of the drawstring is about 14% of the weight of the surface load-bearing structure. The calculation formula for the weight of the drawstring group is:

[0141] m = ρ·L1·n1, where m is the weight of the drawstring (unit: g), ρ is the linear density of the drawstring (unit: g / m), L1 is the length of the drawstring (unit: m), and n1 is the number of inner drawstrings.

[0142] Adopting the preparation method of the internal load-bearing airbag based on the combination of water-soluble cloth and drawstring in the embodiment of the present application, using the water-soluble cloth as a drawstring positioning tool and only retaining the drawstring as the load-bearing structure after dissolution, has the advantages of light weight, environmental protection, and rapid assembly, belongs to the technical field of light-weight structure design and application of environmental protection materials, and is applicable to the preparation of flexible inflatable structures such as aerostats, airships, and airbags.

[0143] Embodiment 3

[0144] This embodiment provides an aerostat. For details not disclosed in the aerostat of this embodiment, please refer to the specific implementation contents of the internal load-bearing airbag based on the combination of water-soluble cloth and drawstring and the preparation method in Embodiments 1 and 2.

[0145] Figure 8 The structural schematic diagram of the aerostat according to the embodiment of the present application is shown.

[0146] As Figure 8 shown, the aerostat includes the internal load-bearing airbag based on the combination of water-soluble cloth and drawstring in any one of Embodiment 1.

[0147] Those skilled in the art should understand that the terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms of "a", "the", and "said" used in the present invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0148] It should be understood that although the terms first, second, third, etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0149] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0150] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. An internal load-bearing airbag based on the combination of water-soluble cloth and drawstring, characterized in that, It includes a water-soluble cloth (1), a drawstring (2), and an airbag (3); Water-soluble cloth (1): It is made of water-soluble non-woven material. As the initial positioning layer of the drawstring, the arrangement path of the drawstring (2) is preset on its surface; Drawstring (2): It is made of water-insoluble fiber material. It is connected to the inside of the airbag (3). The drawstring (2) is also fixed on the arrangement path to form a load-bearing combination with the drawstring (2); Airbag (3): It is made of flexible airtight material. The load-bearing combination is fixed inside it; Among them, the water-soluble cloth (1) dissolves in water after the airbag (3) is inflated, and the drawstring (2) is retained as the airbag load-bearing structure.

2. The internal load-bearing airbag according to claim 1, wherein, It also includes setting a pre-tightening force on the drawstring (2) and then fixing it on the arrangement path. The pre-tightening force is positively correlated with the airbag bearing strength.

3. The internal load-bearing airbag according to claim 2, characterized in that, The calculation steps of the pre-tightening force include: According to the use scenario and load-bearing requirements of the airbag (3), determine the design load F of a single drawstring (unit: N). The calculation formula is: Where P is the airbag bearing strength; S is the load-bearing area of the drawstring group; n is the number of drawstrings, and θ is the angle between the drawstring and the load-bearing direction; Pre-tightening force F 预紧 The calculation formula is as follows: F 预紧 = F × a; Among them, a is a coefficient less than 1.

4. The internal load-bearing airbag according to claim 2, wherein, Setting the pre-tightening force on the drawstring (2) specifically includes: Fix the drawstring to the drum of the tension winch and set the pre-tightening force F of the drawstring through the tension winch controller 预紧 ; Drive the drum to rotate through the electric motor to tighten the drawstring, and use the tension sensor to monitor that the tension of the drawstring reaches F 预紧 ; After the pre-tightening is completed, stop the electric motor to ensure that the drawstring remains in the pre-tightened state and cycle load it n times to ensure the stability of the drawstring.

5. The internal load-bearing airbag according to claim 3 or 4, characterized in that, The drawstring uses a high-strength water-insoluble rope. The high-strength water-insoluble rope includes high-molecular polyethylene rope material or aramid fiber. The load-bearing breaking force of the drawstring is not less than three times the design load F.

6. The internal load-bearing airbag according to any one of claims 1-4, characterized in that, The water-soluble cloth (1) uses materials including PVA fiber, CMC fiber, or PEO fiber material; the water-soluble cloth (1) dissolves in water, and the dissolution time of the water-soluble cloth (1) is controlled by adjusting the water temperature and the cloth thickness.

7. The internal load-bearing airbag according to claim 6, wherein, The dissolution time t of the water-soluble cloth (1) satisfies the following formula: Where h is the thickness of the water-soluble cloth; k is the dissolution rate constant; T is the water temperature; u is the water flow velocity.

8. A method for preparing an internal load-bearing airbag based on the combination of water-soluble cloth and drawstring according to any one of claims 1-7, characterized in that, It includes: Pre-tightening the drawstring (2): According to the load-bearing requirements of the airbag (3), cyclically apply a pre-tightening force to the drawstring (2) through a tension winch; Positioning the drawstring (2): Preset the arrangement path of the drawstring on the surface of the water-soluble cloth (1), and fix the drawstring (2) on the water-soluble cloth (1) through hot pressing, sewing, or water-soluble adhesive process to form a load-bearing combination; Fixing the combination: Fix both ends of the load-bearing combination of the water-soluble cloth (1) and the drawstring (2) on the inner surface of the airbag (3) through a water-insoluble adhesive or sewing process; Inflation and dissolution: After inflating the airbag (3), inject water mist to dissolve the water-soluble cloth (1), and retain the drawstring (2) as the load-bearing structure.

9. The preparation method according to claim 8, characterized in that, The water-soluble cloth (1) uses PVA fiber, CMC fiber, or PEO fiber material, the dissolution temperature is 20 - 50 °C, and the dissolution time is 1 - 10 minutes.

10. An aerostat, characterized in that, It includes the internal load-bearing airbag based on the combination of water-soluble cloth and drawstring described in any one of claims 1 - 7.

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