Manufacturing apparatus for low-temperature adiabatic container

Abstract

This application discloses manufacturing equipment for a cryogenic insulation container. The cryogenic insulation container includes an inner liner and an outer shell. The outer shell includes end caps and a cylindrical body. The cylindrical body is made of fiber composite material and includes corrugated sections and connecting structures at both ends. The corrugated sections and connecting structures are integrally formed, and the end caps are sealed to the connecting structures. The manufacturing equipment includes a mold and a support structure. The mold has a forming cavity, which includes corrugated structural sections and connecting structural sections located on both sides of the corrugated structural sections. The inner surface of the corrugated structural sections is a corrugated surface. The support structure is detachably disposed within the forming cavity and is used to press against and support the prepreg made of fiber composite material laid on the corrugated surface. By applying this application and designing most of the cylindrical body as corrugated sections, the compressive strength of the cylindrical body can be enhanced. Thus, while meeting the compressive strength requirements, the weight and cost of the cylindrical body can be significantly reduced because it is entirely made of fiber composite material.

Description

Technical Field

[0001] This application relates to the field of cryogenic insulation containers for hydrogen storage, and more specifically to manufacturing equipment for cryogenic insulation containers. Background Technology

[0002] With the continuous development of cryogenic technology, the application of industrial cryogenic liquids, such as liquid nitrogen, liquid ammonia, and liquid oxygen, is becoming increasingly widespread. The demand for cryogenic liquid storage and transportation containers in various industries, including aerospace, energy and chemical engineering, food, and medical, is also increasing year by year, with over 300,000 units currently in service globally. Cryogenic insulated containers are typical devices for storing and transporting cryogenic liquid media, mainly composed of an outer container, an inner container, an insulation layer, and an internal support structure. To meet storage and transportation needs, larger volume has become the development trend for cryogenic insulated containers. In cryogenic insulated containers, the outer container acts as a barrier separating the insulation layer from the external environment, and its service condition directly affects the insulation performance of the cryogenic insulated container. As the main component bearing external pressure, the outer container is prone to buckling instability and other failures under the combined action of the internal vacuum insulation layer and the external support pressure. Simultaneously, as the service temperature decreases, the thermal contraction of the metal will cause structural continuity problems, further exacerbating the failure behavior due to external pressure instability; and with the trend towards larger container volumes, the phenomenon of external pressure instability in cryogenic insulated containers will become even more prominent. Furthermore, considering factors such as manufacturing and transportation costs, the weight of the container should also be reduced as much as possible. Therefore, how to achieve lightweight design and enhance resistance to external pressure have become urgent problems to be solved for this type of cryogenic insulated container. Summary of the Invention

[0003] This application aims to address, to a certain extent, one of the technical problems in the related art. To this end, this application provides manufacturing equipment for cryogenic insulation containers.

[0004] To achieve the above objectives, this application adopts the following technical solution: a cylindrical body for the outer shell of a cryogenic insulation container, the cylindrical body being made of fiber composite material, the cylindrical body comprising corrugated sections and connecting structures located at both ends of the corrugated sections, the corrugated sections and the connecting structures being integrally formed; the dimensions of the cylindrical body satisfy the following relationship:

[0005]

[0006] Where D is the axial length of the cylinder and d is the axial length of the corrugated section.

[0007] The application of this application has the following beneficial effects: by designing most of the cylinder as corrugated sections, the compressive strength of the cylinder can be enhanced. Thus, while meeting the compressive strength requirements, the weight and cost of the cylinder can be significantly reduced because the cylinder is made entirely of fiber composite materials.

[0008] Optionally, the dimensions of the corrugated segment satisfy the following relationship:

[0009] ;

[0010] ;

[0011] in, This refers to the inner diameter of the corrugated section. H is the outer diameter of the corrugated section, H is the wave height of the corrugated section, and L is the wave pitch of the corrugated section.

[0012] Optionally, the connection structure includes a straight edge section and a cylindrical flange, wherein the straight edge section is connected to the corrugated section, and the cylindrical flange is connected to the straight edge section.

[0013] Furthermore, this application also provides a cryogenic insulation container, which includes an inner liner and an outer shell disposed outside the inner liner. The inner liner and the outer shell are spaced apart. The outer shell includes a head and a cylindrical body for the cryogenic insulation container as described in any of the above technical solutions. The head is sealed to the connecting structure. The reasoning process for the beneficial effects of the cryogenic insulation container provided in this application and the aforementioned cylindrical body is similar, and will not be repeated here.

[0014] Furthermore, this application also provides a cylindrical body manufacturing apparatus, the manufacturing apparatus including a mold and a support structure, the mold having a forming cavity, the forming cavity including a corrugated structural section and connecting structural sections located on both sides of the corrugated structural section, the inner surface of the corrugated structural section being a corrugated surface, and the dimensions of the forming cavity satisfying the following relationship:

[0015]

[0016] in, This represents the axial length of the molding cavity. The axial length is defined as the length of the corrugated section. The support structure is detachably disposed within the molding cavity and serves to press against and support the prepreg made of fiber composite material laid on the corrugated surface. This manufacturing equipment enables the production of cylinders entirely made of fiber composite material, significantly reducing the weight and cost of the cylinders. Furthermore, by incorporating the support structure, large-sized cylinders can be manufactured without concerns about cracking or detachment during the curing process.

[0017] Optionally, the connecting structure segment includes a smooth structure segment having a smooth cylindrical inner surface and an annular end face connected to the cylindrical inner surface.

[0018] Optionally, the mold includes a base and a cover, the base and the cover being detachably fixedly connected, and the molding cavity including a first portion on the base and a second portion on the cover, wherein the first portion and the second portion are identical.

[0019] Optionally, the support structure has a contracted state and an erected state. When the support structure is in the contracted state, it can enter and exit the molding cavity. When the support structure is in the erected state, it can compress the prepreg laid on the corrugated surface.

[0020] Optionally, the support structure is a rubber cylinder; or, the support structure includes a support frame and a support ring, the support frame includes a support base and at least N telescopic support rods, N≥2, one end of the support rod is fixed to the support base, the support ring is fixed to the other end of the support rod, and the support ring is used to press against the prepreg laid on the inner wall of the molding cavity.

[0021] Optionally, the support ring is a rubber tube; or, the support ring includes N spaced-apart arc-shaped rigid members, each of which is fixed to one of the N support rods.

[0022] These features and advantages of this application will be disclosed in detail in the following specific embodiments and accompanying drawings. The best embodiments or means of this application will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this application. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0023] The following description, in conjunction with the accompanying drawings, further illustrates this application:

[0024] Figure 1 A schematic diagram of the cylindrical body for the outer shell of a cryogenic insulated container provided in this application;

[0025] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0026] Figure 3 A schematic diagram of the cryogenic insulation container provided in this application;

[0027] Figure 4 This is a schematic diagram of the end cap;

[0028] Figure 5 This is a schematic diagram of the flanged end cap;

[0029] Figure 6 A schematic diagram for calculating the moment of inertia in the comparative experiment;

[0030] Figure 7 A schematic diagram of the structure of the cylinder manufacturing equipment provided in this application;

[0031] Figure 8Exploded view of the manufacturing equipment;

[0032] Figure 9 This is a schematic diagram of the supporting structure;

[0033] Figure 10 This is a schematic diagram of another type of support structure.

[0034] Among them, 1. cylinder, 10. corrugated section, 11. straight edge section, 12. cylinder flange, 2. end cap, 20. end cap flange, 200. through hole, 201. positioning groove, 3. inner liner, 4. vacuum insulation layer, 5. support component, 6. mold, 60. base, 61. cover, 62. forming cavity, 620. corrugated structure section, 621. smooth structure section, 6210. annular end face, 64. handle, 7. support structure, 70. support frame, 700. support base, 701. support rod, 71. support ring, 710. rubber tube, 711. rigid component. Detailed Implementation

[0035] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this application and should not be construed as limiting it.

[0036] The terms "an embodiment," "example," or "example" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this application. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0037] The first aspect of this application provides a cylindrical shell for a cryogenic insulated container, such as... Figure 1 and Figure 2 As shown, the cylinder is made of fiber composite material. The cylinder 1 includes a corrugated section 10 and connecting structures located at both ends of the corrugated section 10, and the corrugated section 10 and the connecting structures are integrally formed. The dimensions of the cylinder 1 satisfy the following relationship:

[0038]

[0039] Where d is the axial length of the corrugated section 10, and D is the axial length of the cylinder.

[0040] The fiber composite material described in this embodiment can be carbon fiber composite material, glass fiber composite material, aramid fiber composite material, etc. If it is necessary to enhance its performance, resin-based composite materials that are correspondingly reinforced by the above-mentioned composite materials can also be selected, such as carbon fiber reinforced composite material, glass fiber reinforced composite material, aramid fiber reinforced composite material, etc.

[0041] Through research, the inventors discovered that related technologies primarily employ material improvement to achieve lightweight design, progressing from austenitic stainless steel to aluminum alloys and then to fiber composite materials, resulting in progressively lighter weights. However, this also reduces their resistance to external pressure. To address this, related technologies use reinforcing rings wrapped around the outer wall surface to enhance pressure resistance, but this further increases weight. In this application, the cylinder 1 is entirely made of fiber composite material, significantly reducing its weight and cost. Furthermore, by designing most of the cylinder 1 as corrugated sections 10, its pressure resistance is enhanced, eliminating the need for external reinforcing rings and achieving both lightweight design and enhanced pressure resistance.

[0042] It should be noted that while some related technologies design the cylinder as largely corrugated, these methods cannot achieve a completely fiber-reinforced composite material cylinder, resulting in greater weight, hindering lightweight design, and increasing manufacturing and transportation costs. Furthermore, these related technologies typically use a metal inner cylinder as a base, with a composite material outer cylinder cured on top. This can easily create tiny gaps between the inner and outer cylinders. For cryogenic insulation containers, these tiny gaps pose a safety hazard, potentially leading to cracks or dents over time. The cylinder provided in this application, however, is entirely made of fiber-reinforced composite material, resulting in significant weight reduction and avoiding the aforementioned defects.

[0043] In this embodiment, the dimensions of the corrugated segment 10 satisfy the following relationship:

[0044] ;

[0045] ;

[0046] in, The inner diameter of corrugated section 10 is given. Here, H is the outer diameter of the corrugated section 10, H is the wave height of the corrugated section 10, and L is the wave pitch of the corrugated section 10. The inner diameter here refers to the inner diameter of the inner wall of the corrugated section 10 on the cylinder 1 at the wave trough, and the outer diameter refers to the outer diameter of the outer wall of the corrugated section 10 on the cylinder 1 at the wave crest.

[0047] Under the above conditions, the shell made from the cylinder 1 has significantly enhanced resistance to external pressure. It is understood that, in alternative embodiments, the size of the corrugated section 10 may not satisfy the above relationship, which may result in a relatively weakened resistance to external pressure of the shell, but it still has better resistance to external pressure than shells in related technologies.

[0048] The connecting structure described in this embodiment includes a straight edge section 11 and a cylindrical flange, which are used to assemble with a metal end cap to form an outer shell. The straight edge section 11 is connected to the corrugated section 10, and the cylindrical flange 12 is connected to the straight edge section 11.

[0049] In this embodiment, the axial length of the cylinder is not less than 1.6m, and the inner diameter of the corrugated section 10 is not less than 0.9m. That is, the cylinder 1 in this embodiment can be made into a large-size cylinder, and the volume of the cryogenic insulation container manufactured using this cylinder can be not less than 1000L. In other optional embodiments, the cylinder can also be manufactured into a smaller size, and its axial length and the inner diameter of the corrugated section can be designed to other sizes as needed.

[0050] The second aspect of this application provides cryogenic insulating containers, such as... Figure 3 , Figure 4 and Figure 5 As shown, the cryogenic insulated container includes an inner liner 3 and an outer shell disposed outside the inner liner 3. The inner liner 3 and the outer shell are spaced apart. The outer shell includes a head 2 and a cylindrical body for the cryogenic insulated container provided in the first aspect of this application. The head 2 is sealed to the connecting structure. Specifically, the head 2 has a head flange 20 adapted to the cylindrical body flange 12. The cylindrical body 1 and the head 2 are fixedly connected to the head flange 20 through the cylindrical body flange 12. The inner liner 3 is fixed to the head 2 through a support member 5. In this application, the inner liner 3, the head 2, and the support member 5 can all adopt solutions already available in related technologies. For example, the inner liner 3 can be a single-layer structure of metal inner liner or a multi-layer structure such as a fully wound composite material inner liner; the head 2 can be an elliptical head, a butterfly head, or an isostatic head, etc. A vacuum insulation layer 4 is formed between the inner liner 3 and the outer shell by vacuuming. Of course, insulation materials can also be used as the insulation layer.

[0051] Additionally, a positioning groove 201 is provided on the end cap flange 20, and a sealing ring is installed within the positioning groove 201. The sealing ring is clamped between the cylinder flange 12 and the end cap flange 20. Furthermore, the cylinder flange 12 and the end cap flange 20 are fastened together by bolt threads. Specifically, both the cylinder flange 12 and the end cap flange 20 are provided with through holes for the bolts to pass through. Figure 5 The image shows a through-hole 200 on the end cap flange 20. This ensures that the leakage rate of the vacuum insulation layer is less than [a certain value]. It is easy to understand that, in other alternative embodiments, the positioning groove can also be provided on the cylinder flange, or positioning grooves can be provided on both the head flange and the cylinder flange.

[0052] To demonstrate that the cryogenic insulated container provided in this application has good resistance to external pressure and good weight reduction after adopting the cylindrical structure, a comparative experiment was conducted between the cryogenic insulated container provided in this application and cryogenic insulated containers in related technologies. The comparative experiment and results are described below:

[0053] Taking a cryogenic insulated container for storing liquid oxygen as an example, the parameters of a commonly used product in related technologies are as follows: the inner liner is made of 316L stainless steel, with a length of 2.6m, an inner diameter of 1m, and a wall thickness of 9mm; the outer shell is also made of 316L stainless steel, with a cylindrical length of 2.76m, an inner diameter of 1.15m, and a wall thickness of 6mm. The metal end caps are made of 316L stainless steel and adopt a standard elliptical end cap shape, with a flange height of 115mm. The density of 316L stainless steel is 7.98 g / cm³. 3 The weight of the outer shell is calculated to be approximately 0.486t, and the total mass of the entire cryogenic insulation container is approximately 1.287t. Based on the external pressure vessel verification method adopted in the national standard GB150.3 "Cryogenic Insulation Containers Part 3: Design", the allowable pressure of the outer shell is calculated to be 0.13MPa.

[0054] The product parameters for manufacturing the cryogenic insulated container provided in this application are as follows: the inner liner and metal end caps remain unchanged; the outer shell is manufactured using a fiber composite material, the shell being made of T700 carbon fiber composite material; the shell length is 2.76m; the shell wall thickness is 6mm; and the density of the T700 carbon fiber composite material is 1.8g / cm³. 3 This application designs different dimensions for the corrugated section of the cylinder, manufacturing three types of cylinders and their related cryogenic insulation containers, the parameters of which are described below:

[0055] The parameters of the cryogenic insulation container used for comparison experiment 1 are as follows: the inner diameter of the corrugated section 10 is 1.15m, the outer diameter is 1.38m, the wave height is 230mm, and the wave pitch is 460mm; the wave number is 5, and the waveform is designed as a sine curve; the axial length of the corrugated section is 2.3m, and the height of the flange structure is 115mm. The calculated mass of the container is approximately 0.096t, and the mass of the entire cryogenic insulation container is 0.897t.

[0056] The parameters of the cryogenic insulation container used for comparison experiment two are as follows: the inner diameter of the corrugated section 10 is 1.15m, the outer diameter is 1.265m, the wave height is 115mm, and the wave pitch is 115mm; the wave number is 22, and the waveform is designed as a sine curve; the axial length of the corrugated section is 2.53m, and the height of the flange structure is 115mm. The calculated mass of this section is approximately 0.102t, and the mass of the entire cryogenic insulation container is 0.903t.

[0057] The parameters of the cryogenic insulation container used for comparison experiment three are as follows: the inner diameter of the corrugated section is 1.15m, the outer diameter is 1.334m, the wave height is 184mm, and the wave pitch is 246mm; the wave number is 10, and the waveform is designed as a sine curve; the axial length of the corrugated section is 2.442m, and the height of the flange structure is 115mm. The calculated mass of the container is approximately 0.100t, and the mass of the entire cryogenic insulation container is 0.901t.

[0058] In addition, based on the circumferential stability verification method for bellows under external pressure used in the national standard GB / T 16749-2018 "Low-Temperature Insulated Containers - Waveform Expansion Joints", the outer shell of the cylindrical body made of fiber composite material designed in this specific embodiment is verified. (Reference) Figure 6 As shown, the moment of inertia Ia of the corrugated section cross-section about the aa axis and the moment of inertia Ib of the cylindrical part replaced by the corrugated section about the bb axis are calculated and compared. If Ia is greater than Ib, the corrugated pipe can be considered as part of the cylindrical body for external pressure axial stability verification; if Ia is less than Ib, it is necessary to further convert it into an equivalent length cylinder for external pressure axial stability verification. Therefore, the circumferential stability verification results for cylinder 1 in the above three comparative experiments are shown in the table below:

[0059]

[0060] Therefore, compared with the cryogenic insulation containers of the prior art, the cryogenic insulation container with a cylinder made of fiber composite material proposed in this application has significant advantages, with its overall weight reduced by about 30% and its external pressure resistance increased by about 23%.

[0061] The third aspect of this application provides a cylindrical shell manufacturing apparatus that can be used to manufacture the cylindrical shell for cryogenic insulation container shells provided in the first aspect of this application. Figure 7 and Figure 8 As shown, the manufacturing equipment includes a mold 6 and a support structure 7. The mold 6 has a forming cavity 62, which includes a corrugated structural section 620 and connecting structural sections located on both sides of the corrugated structural section 620. The inner surface of the corrugated structural section 620 is a corrugated surface. The dimensions of the forming cavity 62 satisfy the following relationship:

[0062]

[0063] in, The axial length of the forming cavity 62 is... The axial length of the corrugated section 620;

[0064] The support structure 7 is detachably disposed within the molding cavity 62, and the support structure 7 is used to press against and support the prepreg made of fiber composite material and laid on the corrugated surface.

[0065] By laying prepreg on the corrugated surface, corrugated sections can be formed after curing. This manufacturing equipment enables the production of cylinders entirely made of fiber composite materials, significantly reducing the weight and cost of the cylinders. Furthermore, by incorporating the support structure 7, large-sized cylinders can be manufactured without concerns about cracking or detachment during the curing process.

[0066] The connecting structure segment in this embodiment includes a smooth structure segment, which has a smooth cylindrical inner surface (a straight edge segment can be formed by laying prepreg on it and curing it), and an annular end face 6210 connected to the cylindrical inner surface (a cylinder flange can be formed by laying prepreg on it and curing it).

[0067] In this embodiment, the mold 6 includes a base 60 and a cover 61, which are detachably connected as a single unit. The molding cavity 62 includes a first part located on the base 60 and a second part located on the cover 61, and the first part and the second part are identical. This ensures that when a complete cylinder made of fiber composite material is formed after curing, the separation of the base and cover is not affected by the cylinder. The support structure 7 has a contracted state and an extended state. When the support structure 7 is in the contracted state, it can enter and exit the molding cavity 62; when the support structure 7 is in the extended state, it can compress the prepreg laid on the corrugated surface.

[0068] It should be noted that, preferably, a support structure 7 is provided at each annular trough on the corrugated structure section 620, so that the prepreg laid on the inner wall of the molding cavity 62 can be subjected to pressure. However, in practical applications, since the prepreg itself has a certain degree of overall strength, it is generally sufficient to provide one support structure 7 at regular intervals. Taking the 2.76m long cylinder 1 with a corrugation number of 10 manufactured in the aforementioned comparative experiment 3 of this embodiment as an example, in this case, it is sufficient to provide 3 to 5 support structures 7 at uniform intervals.

[0069] For the prepreg laid on the inner cylindrical surface of the smooth structural section 621 (which, after curing, corresponds to the straight edge section 11 of the cylinder 1) and the prepreg laid on the annular end face 6210 (which, after curing, corresponds to the cylinder flange 12 of the cylinder 1), a simple ring structure of suitable size can be used for pressure support. In optional embodiments, it is not necessary to specifically provide pressure support for the prepreg laid on the inner cylindrical surface and the prepreg laid on the annular end face. During the manufacturing process of the cylinder, the prepreg at the above two locations was not cracked or detached due to its small size, even without pressure support. However, if the overall size of the cylinder increases, and the corresponding straight edge section and cylinder flange are larger, the aforementioned ring structure can be used to provide pressure support for the prepreg at these locations as needed.

[0070] In addition, both the base 60 and the cover 61 in this embodiment are provided with handles 64. After curing, the operator can use the handles 64 to separate the cover 61 from the base 60 to obtain the completed cylinder made of fiber composite material. The base 60 and the cover 61 can be locked and fixed together by an openable lock, or by using common detachable structures such as bolts and buckles, which will not be described in detail here.

[0071] Specifically, in this embodiment, such as Figure 9As shown, the support structure 7 includes a support frame 70 and a support ring 71. The support frame 70 includes a support base 700 and four telescopic support rods 701. One end of each support rod 701 is fixed to the support base 700, and the support ring 71 is fixed to the other end of each support rod 701. The support ring 71 is used to press against the prepreg laid on the inner wall of the molding cavity 62. In this embodiment, the support ring 71 is a rubber tube 710. When the rubber tube 710 is in the supported state, it can press against and support the prepreg laid on the inner wall of the molding cavity 62, thus preventing the prepreg from cracking or falling off during the subsequent curing process. In a preferred embodiment, the outer surface of the rubber tube can be designed to match the trough of the corrugated structure section 620. After curing, the gas inside the rubber tube 710 is released, giving it a certain elastic deformation capability. Then, the support rod 701 is contracted, reducing the overall cross-section of the support structure 7, allowing it to be removed from the molding cavity 62. The telescoping of the support rod 701 is a common existing technology. The support rod 701 in this application comprises two sections: a first rod and a second rod. The first rod has a slide for the second rod to telescop and extend. A fastening pin is placed between the first and second rods. When the rubber tube 710 needs to be supported, the first rod is pulled out relative to the second rod and fixed with the fastening pin. Then, the rubber tube 710 is inflated until the internal air pressure meets the requirements, thus placing the rubber tube 710 in the supported state. Besides the above-mentioned solution adopted in this application, other methods can also be used to achieve the telescoping of the support rod in other optional embodiments. Telescoping rod structures are common existing technologies and will not be elaborated here.

[0072] Because the rubber tubes 710 in this embodiment need to withstand the high temperatures (100°C to 300°C) during the curing process, they must all be made of high-temperature resistant rubber materials, such as fluororubber and silicone rubber, and must be able to withstand temperatures up to 300°C. In addition, because rubber has a certain degree of deformation capability, when inflated to its supported state, its external shape can automatically adapt to the trough shape of the corrugated structure section to a certain extent, providing excellent support for the prepreg.

[0073] It is understood that in other alternative embodiments, the support ring may also adopt other structures, such as... Figure 10Another support ring structure is shown, in which the support ring includes four spaced-apart arc-shaped rigid members 711, each fixed to one of four support rods 701. The arc of the rigid members 711 is the same as that of the molding cavity 62, and the rigid members 711 have an outer surface that matches the trough of the corrugated structure section 620. With this design, the rigid members 711 themselves cannot deform like the rubber tube 710, but the overall support structure 7 can change state through the expansion and contraction of the support rods 701. The support ring 71 can also provide pressure support for the prepreg laid on the inner wall of the molding cavity 62. It should also be noted that, because this rigid member 711 is used as the support ring 71, in order for the support structure 7 to shrink, a gap needs to be set between the four rigid members 711 so that adjacent rigid members 711 do not obstruct each other during shrinkage. As mentioned above, since the prepreg as a whole has a certain degree of rigidity, the spacing between the rigid members 711 will not have an unacceptable impact on the supporting effect of the support ring 71 on the prepreg.

[0074] It should also be noted that in this embodiment, four support rods 701 are provided. In other optional solutions, the number of support rods should not be less than two. Similarly, the number of rigid components should correspond to the number of support rods.

[0075] In an optional embodiment, the support structure can also be an inflatable rubber cylinder. The material of the rubber cylinder can be the same as that of the aforementioned rubber tube, and its working principle is roughly the same. When it is necessary to provide pressure support for the prepreg, the rubber cylinder is inflated to expand it to a supported state. A preferred embodiment is that the rubber cylinder has an outer surface adapted to the corrugated structure section. When it is necessary to remove the rubber cylinder, the internal gas is released, at which point the rubber cylinder will have a certain deformation capacity, allowing it to be compressed and its size reduced for removal from the molding cavity.

[0076] The process of manufacturing the cylinder using the manufacturing equipment provided in this embodiment is described below:

[0077] S1: Fix the base 60 and the cover 61, and lay a thin film made of non-stick material such as PTFE on the surface of the molding cavity 62 of the mold 6 and the end face 63 of the mold 6.

[0078] S2: The T700 carbon fiber composite prepreg is laid on the PTFE membrane at layup angles of 0°, 45°, 90°, 135° and 180° until the design thickness of the cylinder is reached, so that the prepreg forms the corresponding corrugated section prepreg, straight edge section prepreg and cylinder flange prepreg.

[0079] S3: The aforementioned support structure 7 is inserted into the molding cavity 62 in a contracted state, and then it is transformed into an extended state to provide pressure support for the prepreg. It should be noted that if a support structure with a support ring is used, several support structures need to be selectively arranged as needed. If a rubber tube is used, only one rubber tube needs to be arranged. In addition, depending on the design dimensions of the straight edge section and the flange of the tube, rings for pressure support of the prepreg at the corresponding positions can also be selectively arranged for both.

[0080] S4: Place the manufacturing equipment containing the prepreg into the curing oven for curing;

[0081] S5: After curing, remove the manufacturing equipment, separate the cover 61 from the base 60, and take out the cured fiber composite material cylinder.

[0082] Furthermore, the process of installing the cylinder body with the metal end caps after manufacturing is described below:

[0083] The prepared fiber composite cylinder is cut according to the design dimensions of the outer shell of the cryogenic insulation container;

[0084] Align the cut cylinder flange 12 with the end cap flange 20 of the metal end cap 2 (pre-install a sealing ring in the positioning groove 201 of the end cap flange 20), and then use bolts to thread-tighten the cylinder flange 12 and the end cap flange 20 together.

[0085] In manufacturing cryogenic insulation containers, a metal end cap is typically installed on one side of the cylinder using the method described above. The inner liner is then inserted into the cylinder and secured to the metal end cap using supporting components. Next, another metal end cap is installed on the other side of the cylinder. Afterward, a vacuum insulation layer is created between the inner liner and the outer shell. Finally, the sealing performance of the cryogenic insulation container is tested to ensure that the leakage rate of the vacuum insulation layer is less than [a certain percentage]. .

[0086] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Those skilled in the art should understand that this application includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this application will be included within the scope of the claims.

Claims

1. Manufacturing equipment for cryogenic insulation containers, characterized in that, The cryogenic insulation container includes an inner liner (3) and an outer shell disposed outside the inner liner (3). The inner liner (3) and the outer shell are spaced apart. The outer shell includes a head (2) and a cylindrical body (1). The cylindrical body (1) is made of fiber composite material. The cylindrical body (1) includes a corrugated section (10) and a connecting structure located at both ends of the corrugated section (10). The corrugated section (10) and the connecting structure are integrally formed. The head (2) is sealed to the connecting structure. The manufacturing equipment includes a mold (6) and a support structure (7). The mold (6) includes a base (60) and a cover (61). The base (60) and the cover (61) are detachably fixedly connected. The mold (6) has a forming cavity (62). The forming cavity (62) includes a corrugated structural section (620) and connecting structural sections located on both sides of the corrugated structural section (620). The inner surface of the corrugated structural section (620) is a corrugated surface. The support structure (7) is detachably disposed on the forming cavity. The prepreg made of fiber composite material and laid on the corrugated surface is placed inside the cavity (62), and the support structure (7) is used to press against and support the prepreg laid on the corrugated surface. The support structure (7) has a contracted state and an erected state. When the support structure (7) is in the contracted state, it can enter and exit the molding cavity (62). When the support structure (7) is in the erected state, it can press the prepreg laid on the corrugated surface. The support structure (7) includes a support frame (70) and a support ring (7). 1) The support frame (70) includes a support base (700) and at least N telescopic support rods (701), where N≥2. One end of the support rod (701) is fixed to the support base (700), and the support ring (71) is fixed to the other end of the support rod (701). The support ring (71) is used to press against the prepreg laid on the inner wall of the molding cavity (62), and the support ring (71) can be embedded in the corrugated structure of the corrugated structure section (620). The dimensions of the cylinder (1) satisfy the following relationship: Where D is the axial length of the cylinder (1) and d is the axial length of the corrugated section (10); The dimensions of the molding cavity (62) satisfy the following relationship: Where D0 is the axial length of the forming cavity (62) and d0 is the axial length of the corrugated structure segment (620); The manufacturing process of the cylinder (1) includes the following steps: Fix the base (60) and the cover (61), and lay a thin film made of non-stick material on the molding cavity (62) and end face (63) of the mold (6); The prepreg of T700 carbon fiber composite material is laid on the film at layup angles of 0°, 45°, 90°, 135°, and 180°. The support structure (7) is inserted into the molding cavity (62) to press and support the prepreg. The manufacturing equipment containing the prepreg is placed in a curing oven for curing; After curing, remove the manufacturing equipment, separate the cover (61) and the base (60), and take out the cured fiber composite material cylinder (1).

2. The manufacturing equipment for the cryogenic insulation container as described in claim 1, characterized in that, The dimensions of the corrugated segment (10) satisfy the following relationship: 1.1R in ≤R out ≤1.2R in H≤L≤2H; Among them, R in R is the inner diameter of the corrugated section (10). out H is the outer diameter of the corrugated section (10), H is the wave height of the corrugated section (10), and L is the wave pitch of the corrugated section (10).

3. The manufacturing equipment for the cryogenic insulation container as described in claim 1 or 2, characterized in that, The connection structure includes a straight edge section (11) and a cylindrical flange (12), the straight edge section (11) is connected to the corrugated section (10), and the cylindrical flange (12) is connected to the straight edge section (11).

4. The manufacturing equipment for the cryogenic insulation container as described in claim 1, characterized in that, The connecting structure segment includes a smooth structure segment (621), which has a smooth cylindrical inner surface and an annular end face (6210) connected to the cylindrical inner surface.

5. The manufacturing equipment for the cryogenic insulation container as described in claim 1, characterized in that, The molding cavity (62) includes a first portion located on the seat (60) and a second portion located on the cover (61), and the first portion is the same as the second portion.

6. The manufacturing equipment for the cryogenic insulation container as described in claim 1, characterized in that, The support ring (71) is a rubber tube (710); Alternatively, the support ring (71) includes N spaced-apart arc-shaped rigid members (711), and the N rigid members (711) are fixed one-to-one with the N support rods (701).

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