Vacuum heat insulation container explosion-proof device and processing method thereof

Abstract

The invention discloses a vacuum heat insulation container explosion-proof device and a processing method thereof, and relates to the technical field of vacuum heat insulation containers. Comprising an explosion-proof opening and a protective cover, and the explosion-proof opening is formed in the protective cover; the explosion-proof opening comprises an explosion-proof cover, an explosion-proof seat and a vacuum heat insulation container shell; the explosion-proof cover is arranged above the explosion-proof seat, and the vacuum heat insulation container shell is arranged below the explosion-proof seat; the protective cover comprises a protective pipe, a flange and a flange cover; the flange is connected with one end of the protective tube; the flange cover is fixed on the flange; and the other end of the protection tube is connected with the vacuum insulation container shell. By adopting the explosion-proof device of the vacuum heat insulation container and the processing method of the explosion-proof device provided by the embodiment of the invention, the leakage of explosive gas or liquid is effectively prevented, so that the explosion risk is greatly reduced, the explosion-proof capability is improved, and the harm degree of explosion pressure and shock waves is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of vacuum insulation containers, and in particular, relates to an explosion-proof device for a vacuum insulation container and a processing method thereof. Background Art

[0002] In the prior art, vacuum insulated containers may face various challenges during long-term use. In particular, if the explosion-proof device inside the container is not sealed properly or a cryogenic liquid leaks, the vacuum state may be lost. Once the vacuum state is broken, the cryogenic liquid in the container will evaporate rapidly, which will not only cause unnecessary liquid loss, but also cause a sharp increase in pressure inside the container shell. In extreme cases, this pressure accumulation may trigger an explosion accident, posing a serious threat to the safety of personnel and property.

[0003] In addition, existing explosion-proof devices may have certain limitations in design and manufacturing and cannot effectively deal with the above risks. For example, some traditional explosion-proof devices may have deficiencies in sealing performance, life or response speed and cannot provide adequate protection at critical moments.

[0004] Therefore, the industry urgently needs a new and reliable explosion-proof device that can not only provide excellent sealing performance, but also respond quickly when the pressure increases abnormally to ensure the economical and safe operation of vacuum insulated containers. Summary of the invention

[0005] The purpose of this application is to provide a vacuum insulation container explosion-proof device and a processing method thereof, which can effectively suppress the leakage rate of the vacuum container, extend the vacuum life, and avoid physical damage, blasting, and even explosion of the container due to overpressure.

[0006] In order to achieve the above objectives, the solution of this application is:

[0007] In a first aspect, an embodiment of the present application provides an explosion-proof device for a vacuum insulated container, comprising an explosion-proof port and a protective cover, wherein the explosion-proof port is arranged inside the protective cover;

[0008] The explosion-proof opening includes an explosion-proof cover, an explosion-proof seat and a vacuum insulation container shell; the explosion-proof cover is installed above the explosion-proof seat, and the vacuum insulation container shell is installed below the explosion-proof seat;

[0009] The protective cover comprises a protective tube, a flange and a flange cover; the flange is connected to one end of the protective tube, and the flange cover is fixed on the flange; the other end of the protective tube is connected to the outer shell of the vacuum insulation container.

[0010] The above device according to the embodiment of the present application may also have the following additional technical features:

[0011] Furthermore, the device includes bolts, washers and nuts, and the flange is provided with a plurality of bolt holes; the flange cover is provided with bolt holes of the same number and diameter corresponding to the bolt hole positions of the flange, and the flange cover is fixed to the flange by bolts, washers and nuts, and the washers are arranged between the nuts and the flange.

[0012] Furthermore, the device includes an explosion-proof seat transition plate, which is installed between the vacuum insulation container shell and the explosion-proof seat.

[0013] Furthermore, the device comprises an O-ring, which is installed between the explosion-proof cover and the explosion-proof seat, and the explosion-proof cover and the explosion-proof seat are sealed by the O-ring.

[0014] Furthermore, the explosion-proof cover is provided with an explosion-proof cover sealing surface, which includes a lower plane, a cone surface with a semi-cone angle of α and a transition arc surface, and the transition arc surface is located between the lower plane and the cone surface with a semi-cone angle of α.

[0015] Furthermore, the explosion-proof seat is provided with an explosion-proof seat sealing surface, which is a conical sealing surface with a semi-conical angle of β and is arranged on the inner side of the upper end of the explosion-proof seat, and an annular groove is opened on the outer side of the explosion-proof seat.

[0016] Further, the semi-cone angle α of the cone surface of the explosion-proof cover sealing surface is smaller than the semi-cone angle β of the cone surface of the explosion-proof seat sealing surface.

[0017] Furthermore, the protection tube is provided with exhaust holes, and the total area of ​​the exhaust holes is not less than the flow cross-sectional area of ​​the throat diameter of the explosion-proof seat.

[0018] In a second aspect, an embodiment of the present application provides a method for processing a vacuum insulation container explosion-proof device, comprising:

[0019] Installation of explosion-proof port: Process the parts of the explosion-proof seat except the explosion-proof seat sealing surface, and process the explosion-proof seat transition plate according to the actual shape of the vacuum insulation container shell; weld the explosion-proof seat transition plate and the explosion-proof seat sealing surface of the explosion-proof seat to form an explosion-proof seat body; process the explosion-proof seat sealing surface into a conical sealing surface with a semi-conical angle of ; weld the explosion-proof seat transition plate to the vacuum insulation container shell; install the explosion-proof cover above the explosion-proof seat, and install an O-ring at the installation connection, vacuum extract the internal interlayer of the vacuum insulation container shell, and complete the installation of the explosion-proof port of the explosion-proof device of the vacuum insulation container shell;

[0020] Installation of the protective cover: connect one end of the protective tube to the flange; connect the other end of the protective tube to the shell of the vacuum insulated container, open a number of bolt holes on the flange, and open bolt holes of the same number and diameter at the bolt holes on the flange cover corresponding to the bolt holes on the flange, insert the bolts into the bolt holes of the flange and the flange cover, install the washers and nuts in sequence through the bolts, and complete the installation of the protective cover of the explosion-proof device of the shell of the vacuum insulated container.

[0021] Furthermore, the method includes thickening the bottom of the explosion-proof seat to reduce welding deformation generated when welding the explosion-proof seat transition plate to the vacuum insulation container shell.

[0022] Compared with the prior art, the vacuum insulation container explosion-proof device and the processing method thereof provided in the embodiments of the present application have the following beneficial technical effects:

[0023] The embodiment of the present application achieves efficient sealing performance through the explosion-proof cover, O-ring and explosion-proof seat and the close fit between them, effectively preventing the leakage of explosive gas or liquid, thereby greatly reducing the risk of explosion.

[0024] The embodiment of the present application not only enhances the connection strength through the design of the explosion-proof seat transition plate, but also further improves the explosion-proof capability through its special structural design (such as annular grooves and a thickened bottom). When an explosion occurs, these designs can effectively absorb and disperse the explosion energy and protect the safety of surrounding equipment and personnel.

[0025] The embodiment of the present application ensures that when the explosion-proof vent is opened, the internal gas can be quickly discharged through the exhaust holes arranged on the protective tube, thereby reducing the degree of harm caused by the explosion pressure and shock wave; the design is compact, occupies little space, and reduces the overall structure and performance of the vacuum insulation container.

[0026] The embodiment of the present application uses a modular design of the explosion-proof port and the protective cover to make the various components of the explosion-proof device easy to install and disassemble, which facilitates subsequent maintenance and replacement work. At the same time, the detailed installation steps and instructions also reduce the installation difficulty and error rate.

[0027] The embodiments of the present application reduce heat loss and gas leakage inside the vacuum insulated container through strict sealing measures and explosion-proof design, thereby improving its insulation effect and utilization efficiency; the protective effect of the explosion-proof device not only reduces the damage to the vacuum insulated container by external factors, but also extends the service life of the equipment by reducing internal pressure and temperature fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The overall structural schematic diagram of the vacuum insulation container explosion-proof device according to the embodiment of the present application is shown;

[0029] Figure 2 A schematic diagram showing the partial details of the explosion-proof device for a vacuum insulated container according to an embodiment of the present application is shown;

[0030] Figure 3 A schematic diagram of an explosion-proof cover of an explosion-proof device for a vacuum insulated container according to an embodiment of the present application is shown;

[0031] Figure 4 A schematic diagram of an explosion-proof seat of an explosion-proof device for a vacuum insulated container according to an embodiment of the present application is shown.

[0032] Explanation of the accompanying reference numerals: 1. explosion-proof cover; 2. O-ring; 3. explosion-proof seat; 4. protective tube; 5. flange; 6. flange cover; 7. bolt; 8. gasket; 9. nut; 10. vacuum insulation container shell; 11. explosion-proof seat transition plate; 12. explosion-proof cover sealing surface; 13. explosion-proof seat sealing surface; 14. annular groove. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0034] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] like Figure 1 As shown, an embodiment of the present application provides an explosion-proof device for a vacuum insulated container, including an explosion-proof port and a protective cover. The explosion-proof port is arranged inside the protective cover, and is composed of an explosion-proof cover 1, an O-ring 2, an explosion-proof seat 3 and an explosion-proof seat transition plate 11, thereby achieving efficient sealing and explosion-proof functions.

[0037] like Figure 2 As shown, it is a schematic diagram of the partial detailed structure of the explosion-proof device of the vacuum insulated container of the embodiment of the present application. The explosion-proof cover 1 of the embodiment of the present application is installed above the explosion-proof seat 3, the vacuum insulated container shell 10 is installed below the explosion-proof seat 3, the explosion-proof seat transition plate 11 is installed between the vacuum insulated container shell 10 and the explosion-proof seat 3, the O-ring 2 is installed between the explosion-proof cover 1 and the explosion-proof seat 3, and the explosion-proof cover 1 and the explosion-proof seat 3 are sealed by the O-ring 2.

[0038] like Figure 3 As shown, it is a schematic diagram of the explosion-proof cover of the explosion-proof device of the vacuum insulated container according to an embodiment of the present application. The explosion-proof cover 1 is provided with an explosion-proof cover sealing surface 12. The explosion-proof cover sealing surface 12 includes a lower plane, a conical surface with a semi-conical angle of α and a transition arc surface. The transition arc surface is located between the lower plane and the conical surface with a semi-conical angle of α.

[0039] Specifically, the explosion-proof cover 1 has a unique sealing surface design, including a lower plane, a cone surface with a semi-cone angle of α, and a transition arc surface between the two, ensuring a close fit and seal with the explosion-proof seat 3. As the main sealing component of the explosion-proof port, the explosion-proof cover 1 closely fits with the explosion-proof seat 3 through its unique sealing surface design (including a lower plane, a cone surface with a semi-cone angle of α, and a transition arc surface) to form an effective seal. In abnormal circumstances, such as a sharp increase in internal pressure, the explosion-proof cover 1 can be opened in a preset manner to release pressure and prevent the container from exploding.

[0040] like Figure 4 As shown, it is a schematic diagram of the explosion-proof seat of the explosion-proof device of the vacuum insulated container of the embodiment of the present application. The explosion-proof seat 3 is provided with an explosion-proof seat sealing surface 13. The explosion-proof seat sealing surface 13 is a conical sealing surface with a semi-conical angle of β, which is arranged on the inner side of the upper end of the explosion-proof seat 3. An annular groove 14 is provided on the outer side of the explosion-proof seat 3.

[0041] Specifically, the inner side of the upper end of the explosion-proof seat 3 is provided with a conical sealing surface with a semi-conical angle of β, and the outer side is provided with an annular groove 14 and the bottom of the explosion-proof seat 3 is thickened. Such a design enhances the strength and sealing performance of the explosion-proof seat 3. The explosion-proof seat 3 is an important component for supporting and fixing the explosion-proof cover 1. The inner side of its upper end is provided with a conical sealing surface with a semi-conical angle of β, which cooperates with the conical surface of the explosion-proof cover 1 to form a sealing structure. The annular groove 14 on the outer side of the explosion-proof seat 3 and the thickened bottom design enhance its strength and stability, ensuring that it will not break or deform under high pressure.

[0042] The semi-cone angle α of the cone surface of the explosion-proof cover sealing surface 12 is smaller than the semi-cone angle β of the cone surface of the explosion-proof seat sealing surface 13 .

[0043] The semi-cone angle α of the cone surface of the explosion-proof cover 1 is smaller than the semi-cone angle β of the cone surface at the upper end of the explosion-proof seat 3. This design enables the explosion-proof cover 1 to fit more closely to the explosion-proof seat 3 when under pressure, further enhancing the sealing effect.

[0044] Specifically, when the two conical surfaces are matched, if the semi-conical angle α is smaller than β, then under the same external pressure, the smaller angle of the conical surface of the explosion-proof cover 1 will cause a greater local pressure to be generated at its contact edge. This pressure concentration effect helps to make the sealing surface fit more closely and reduce the possibility of leakage.

[0045] Although the pressure increases at the edge, due to the difference in the angle of the cone, the pressure gradually decreases inward along the cone, forming a relatively uniform pressure distribution area. This distribution helps to form a stable sealing effect on the entire sealing surface instead of generating high pressure at only a local point.

[0046] The explosion-proof cover 1 is usually made of a material with a certain elasticity, such as metal or polymer material. When subjected to external pressure, the explosion-proof cover 1 can undergo a certain degree of elastic deformation to adapt to the shape of the conical surface of the explosion-proof seat 3. If α is less than β, the explosion-proof cover 1 will fit more easily to the conical surface of the explosion-proof seat 3 during the deformation process, forming a tighter seal.

[0047] Due to the difference in cone angles, the explosion-proof cover 1 can show better adaptability when subjected to pressures of different directions or magnitudes. This adaptability helps to maintain stable sealing performance in a complex working environment.

[0048] When the cone surface of the explosion-proof cover 1 and the cone surface of the explosion-proof seat 3 are closely fitted, the tiny gap between them is greatly reduced or even eliminated, which reduces the possibility of gas or liquid leaking through these gaps. Due to the close fit of the sealing surface and the uniform pressure distribution, this design also helps to improve the durability of the seal. Even under long-term use or under the influence of external factors such as vibration, the sealing performance can be maintained.

[0049] The protective cover is composed of a protective tube 4, a flange 5, a flange cover 6, bolts 7, washers 8 and nuts 9, which provide a solid external protection for the explosion-proof opening. These components together constitute the fixing and sealing system of the protective cover. The flange 5 is used to connect the protective tube 4 and other components, and the flange cover 6 is used to close the opening of the protective tube 4. The bolts 7, washers 8 and nuts 9 firmly connect the various components together through tightening to form an integral structure. The use of these components not only improves the strength and stability of the protective cover, but also ensures the reliability of its sealing performance.

[0050] The protective cover is a vital component of the explosion-proof device of a vacuum insulated container. Its main function is to provide an additional layer of protection to ensure that under abnormal circumstances (such as a sharp increase in internal pressure), the pressure can be safely released and the leakage of explosive gases or liquids can be prevented, thereby protecting the surrounding environment and personnel safety.

[0051] The protective cover of the embodiment of the present application includes a protective tube 4, a flange 5 and a flange cover 6; the flange 5 is connected to one end of the protective tube 4, and the flange cover 6 is fixed on the flange 5; the other end of the protective tube 4 is connected to the vacuum insulation container shell 10. It also includes bolts 7, washers 8 and nuts 9, and the flange 5 is provided with a plurality of bolt 7 holes; the flange cover 6 is provided with bolt 7 holes of the same number and diameter corresponding to the bolt 7 holes of the flange 5, and the flange cover 6 is fixed to the flange 5 by bolts 7, washers 8 and nuts 9, and the washers 8 are arranged between the nuts 9 and the flange 5.

[0052] The protection tube 4 is usually made of high-strength, corrosion-resistant materials, such as stainless steel or special alloys. Its design takes into account the location and size of the explosion-proof port, ensuring that it can tightly surround the explosion-proof port and provide sufficient protection space. The inside of the protection tube 4 is smooth to reduce the resistance of gas flow and ensure that the internal gas can be discharged quickly and smoothly when the explosion-proof port is opened.

[0053] The protective tube 4 is provided with exhaust holes arranged in a careful manner, and the total area of ​​the exhaust holes is not less than the flow cross-sectional area of ​​the throat diameter d of the explosion-proof seat 3. The size, number and position of these exhaust holes are precisely calculated to ensure that when the explosion-proof port is opened, the internal gas can be discharged evenly and quickly, thereby effectively reducing the risk of explosion. At the same time, the design of the exhaust holes also takes into account the possibility of preventing external impurities from entering the interior of the protective tube 4.

[0054] The protection tube 4 is connected to the outer shell of the vacuum insulation container by high-strength connection methods such as welding to form a solid and reliable protection structure. This connection method not only ensures the stability and sealing of the protection tube 4, but also improves the overall strength and safety of the entire explosion-proof device.

[0055] Flange 5 is a key component for connecting protection tube 4 and other components. It is usually made of the same or compatible material as protection tube 4 to ensure the strength and sealing of the connection. The design of flange 5 takes into account the convenience and reliability of connection, and usually has a flat sealing surface and an appropriate bolt 7 hole layout.

[0056] The flange cover 6 is used to close the opening of the protection tube 4 to prevent external impurities from entering the protection tube 4. When the explosion-proof device needs to be maintained or inspected, the flange cover 6 can be easily removed. The flange cover 6 is usually fastened to the flange 5 by bolts 7, washers 8, nuts 9 and other components to form a reliable sealing structure.

[0057] Bolts 7, washers 8 and nuts 9 together constitute the fastening system of the protective cover. Bolts 7 are used to connect flanges 5 and flange covers 6, while washers 8 are used to increase sealing performance and prevent bolts 7 from loosening. Nuts 9 are used to tighten bolts 7 to ensure that the connection between the various components is firm and reliable. The selection and installation of these components must be carried out in strict accordance with relevant standards and specifications to ensure the strength and sealing performance of the protective cover.

[0058] The embodiment of the present application also provides a processing method for the explosion-proof device of a vacuum insulated container, in which the explosion-proof seat 3 is preliminarily processed, but the semi-conical angle β cone sealing surface on the inner side of its upper end is retained without processing, and the curvature and inner hole of the explosion-proof seat transition plate 11 are processed according to the actual shape of the outer shell curved surface. The explosion-proof seat transition plate 11 plays a key role in the installation process of the explosion-proof seat 3. It is processed according to the actual shape of the curved surface of the vacuum insulated container outer shell 1O to ensure that the explosion-proof seat 3 can be accurately installed on the outer shell. The transition plate is also firmly connected to the explosion-proof seat 3 by welding to form an integral structure, which improves the overall strength and sealing performance of the explosion-proof port.

[0059] The explosion-proof seat transition plate 11 is firmly welded from the inner hole to the explosion-proof seat 3 which has not yet been processed with the semi-cone angle β sealing surface as a whole. The welded whole is machined to complete the processing of the cone sealing surface with a semi-cone angle β on the inner side of the upper end of the explosion-proof seat 3. The processed whole is welded from the outer circle of the explosion-proof seat transition plate 11 to the opening position of the vacuum insulation container shell 10. Before welding, the installation clearance of the curved arc needs to be confirmed to prevent the deformation of the sealing surface caused by excessive welding stress.

[0060] Install the O-ring 2 and the explosion-proof cover 1 on the top of the explosion-proof seat 3, and evacuate the inner interlayer of the vacuum insulation container shell 10 to complete the installation of the explosion-proof port. The O-ring 2 is usually located between the explosion-proof cover 1 and the explosion-proof seat 3 to provide additional sealing protection. It is made of elastic material and can deform under pressure and fill the tiny gap of the sealing surface to ensure the integrity of the seal. The use of the O-ring 2 also helps prevent gas or liquid leakage and improve the safety of the device.

[0061] Assemble the protection tube 4 and flange 5 of the protection cover together by welding, weld the protection tube 4 to the vacuum insulation container shell 10, open a number of bolt 7 holes on the flange 5, and open bolt 7 holes of the same number and diameter on the flange cover 6 corresponding to the bolt 7 holes of the flange 5, insert the bolts 7 into the bolt 7 holes of the flange 5 and the flange cover 6, install the washers 8 and nuts 9 through the bolts 7 in sequence, and install the flange cover 6 on the protection cover, finally completing the entire installation of the vacuum insulation container explosion-proof device.

[0062] In summary, the vacuum insulated container explosion-proof device and the installation method thereof have the advantages of compact structure, good sealing performance, and significant explosion-proof effect, which provide a strong guarantee for the safe use of the vacuum insulated container.

[0063] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0064] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A vacuum insulation container explosion-proof device, characterized in that: The device comprises: An explosion-proof opening and a protective cover, wherein the explosion-proof opening is arranged inside the protective cover; The explosion-proof opening comprises an explosion-proof cover (1), an explosion-proof seat (3) and a vacuum insulation container shell (10); the explosion-proof cover (1) is installed above the explosion-proof seat (3), and the vacuum insulation container shell (10) is installed below the explosion-proof seat (3); The protective cover comprises a protective tube (4), a flange (5) and a flange cover (6); the flange (5) is connected to one end of the protective tube (4), and the flange cover (6) is fixed on the flange (5); the other end of the protective tube (4) is connected to the outer shell (10) of the vacuum insulation container.

2. The explosion-proof device for a vacuum insulated container according to claim 1, characterized in that: The device comprises bolts (7), washers (8) and nuts (9); the flange (5) is provided with a plurality of bolt holes; the flange cover (6) is provided with bolt holes of the same number and diameter corresponding to the bolt holes of the flange (5); the flange cover (6) is fixed to the flange (5) by means of the bolts (7), washers (8) and nuts (9); the washers (8) are arranged between the nuts (9) and the flange (5).

3. The explosion-proof device for a vacuum insulated container according to claim 1, characterized in that: The device comprises an explosion-proof seat transition plate (11), and the explosion-proof seat transition plate (11) is installed between the vacuum insulation container shell (10) and the explosion-proof seat (3).

4. The explosion-proof device for a vacuum insulated container according to claim 1, characterized in that: The device comprises an O-ring (2), wherein the O-ring (2) is installed between the explosion-proof cover (1) and the explosion-proof seat (3), and the explosion-proof cover (1) and the explosion-proof seat (3) are sealed by the O-ring (2).

5. The explosion-proof device for a vacuum insulated container according to claim 1, characterized in that: The explosion-proof cover (1) is provided with an explosion-proof cover sealing surface (12), the explosion-proof cover sealing surface (12) comprising a lower plane, a conical surface with a semi-conical angle of α, and a transition arc surface, wherein the transition arc surface is located between the lower plane and the conical surface with a semi-conical angle of α.

6. The explosion-proof device for a vacuum insulated container according to claim 5, characterized in that: The explosion-proof seat (3) is provided with an explosion-proof seat sealing surface (13), which is a conical sealing surface with a semi-conical angle of β and is arranged on the inner side of the upper end of the explosion-proof seat (3). An annular groove (14) is provided on the outer side of the explosion-proof seat (3).

7. The explosion-proof device for a vacuum insulated container according to claim 6, characterized in that: The semi-cone angle α of the conical surface of the explosion-proof cover sealing surface (12) is smaller than the semi-cone angle β of the conical surface of the explosion-proof seat sealing surface (13).

8. The explosion-proof device for a vacuum insulated container according to claim 1, characterized in that: The protection tube (4) is provided with exhaust holes, and the total area of ​​the exhaust holes is not less than the flow cross-sectional area of ​​the throat diameter of the explosion-proof seat (3).

9. A method for processing a vacuum insulation container explosion-proof device according to any one of claims 1 to 8, characterized in that: The method comprises: Installation of explosion-proof opening: processing the parts of the explosion-proof seat (3) except the explosion-proof seat sealing surface (13), and processing the explosion-proof seat transition plate (11) according to the actual shape of the vacuum insulation container shell (10); welding the explosion-proof seat transition plate (11) and the explosion-proof seat sealing surface (13) of the explosion-proof seat (3) to form an explosion-proof seat body; processing the explosion-proof seat sealing surface (13) into a conical sealing surface with a semi-conical angle of β; welding the explosion-proof seat transition plate (11) and the vacuum insulation container shell (10); installing the explosion-proof cover (1) above the explosion-proof seat (3), installing an O-ring (2) at the installation connection, vacuuming the inner interlayer of the vacuum insulation container shell (10), and completing the installation of the explosion-proof opening of the vacuum insulation container shell explosion-proof device; Installation of the protective cover: connect one end of the protective tube (4) to the flange (5); connect the other end of the protective tube (4) to the shell of the vacuum insulation container (10), open a plurality of bolt holes on the flange (5), and open bolt holes of the same number and diameter on the flange cover (6) at positions corresponding to the bolt holes of the flange (5), insert the bolts (7) into the bolt holes of the flange (5) and the flange cover (6), install the gasket (8) and the nut (9) through the bolts (7) in sequence, and complete the installation of the protective cover of the explosion-proof device of the shell of the vacuum insulation container.

10. The method for processing a vacuum insulation container explosion-proof device according to claim 9, characterized in that: The method comprises: The bottom of the explosion-proof seat (3) is thickened to reduce welding deformation generated when the explosion-proof seat transition plate (11) and the vacuum insulation container shell (10) are welded.

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