DEVICE FOR MEASURING THE ARCH HEIGHT OF A RUPTURE DISC IN A HYDROGEN ENVIRONMENT

Description

Two areas of application and high density, reaching 70.78 kg / m³, demonstrate considerable development potential in the field of energy storage. With the continuous development of hydrogen storage technologies, the safety of new hydrogen storage equipment is attracting increasing attention. Emergency situations such as fires or accidents can lead to a sudden increase in pressure within the tanks. Therefore, it is crucial to install safety relief devices in high-pressure hydrogen gas storage equipment to ensure the reliability and safety of the equipment, thereby guaranteeing the safety of personnel and property. In accordance with the provisions of standard T / CATSI05008-2023 "Specific Technical Requirements for the Carbon fiber coiled bottle-type containers with aluminum liner for hydrogen 10 tablets" and market research, the safety discharge device used in carbon fiber coiled bottle-type containers with aluminum liner for hydrogenThe 52 MPa compressed device currently under development is a combined device comprising a rupture disc measured in a hydrogen environment and a fusible alloy cap. In accordance with the provisions of standards T / CATSI05006-2021 "Specific technical requirements for stationary pressure and vacuum vessels for liquid hydrogen" and T / CATSI05007-2023 "Specific technical requirements for mobile pressure and vacuum vessels for liquid hydrogen", one of the safety release devices for liquid hydrogen storage tanks and liquid hydrogen tank trucks is a combined assembly of a safety valve and a rupture disc device measured in a hydrogen environment. Given the above usage scenarios, the hydrogen-based rupture disc, as an indispensable safety accessory for chemical equipment, containers, and piping, is attracting increasing attention. Not only can it, to a large extent, prevent catastrophic overpressures in equipmentchemical and prevent major accidents, but it also guarantees the safety of personnel operating on this equipment. Consequently, the safety relief device with a rupture disc in a hydrogen environment is often considered the last safety barrier for the protection of chemical equipment.

[0004] Given the characteristics of hydrogen itself (low density, wide explosive range and relatively low minimum ignition energy), systems in contact with hydrogen face major safety risks such as fires and explosions caused by hydrogen overpressure leaks. Consequently, the problem of safety relief in systems in a hydrogen environment is particularly critical. Currently, domestic and international researchers have carried out in-depth studies on factors such as the forming arch height, the radius of curvature of the compression ring and the cyclic creep of the rupture discs to be measured, and a large number ofResearch results have enabled the progressive optimization of design and manufacturing parameters during the forming process of measurement failure discs. To date, thanks to systematic experimental studies, a set of calculation methods adapted to industrial design has been developed for conventional types of measurement failure discs.10 However, for hydrogen storage equipment operating in a hydrogen environment, their operating conditions are relatively complex and severe. The choice of materials, failure performance, failure mechanism, sealing performance, and discharge characteristics of measurement failure discs must be determined urgently. Moreover, in existing tests on measurement failure discs,15 the experimental requirements and devices for crown height tests in The hydrogen environment is not mentioned. National and international studies on dynamic tests of rupture disc height to be measured under high hydrogenpressures are still insufficient. Therefore, it is necessary to further strengthen research on rupture disc testing in hydrogen environments in order to evaluate their performance with 20% accuracy and to ensure the safe and stable operation of systems in hydrogen environments. SUMMARY

[0005] The objective of the present invention is to provide a device for measuring the deformation height of a rupture disc in a hydrogen environment, to solve the existing problems of the aforementioned prior art, to allow the measuring device to perform a continuous and dynamic measurement of the deformation height of the rupture disc in a hydrogen environment, and to accurately capture the entire process from deformation to rupture of the disc, thus providing technical support to promote the sustainable development of safety discharge devices for hydrogen storage cylinders.

[0006] To achieve this objective, the present invention proposes the following solution:The present invention provides a device for measuring the height of the curvature of a rupture disc in a hydrogen environment, comprising: 5 a unit of measurement, said unit of measurement comprising a rangefinder and a measuring rod, said rangefinder being located directly above said measuring rod and being capable of monitoring the displacement of said measuring rod; an action unit, said action unit comprising a high-pressure side sealing cover, a low-pressure side sealing cover, and a clamping and positioning ring, said high-pressure side sealing cover and said low-pressure side sealing cover being removably connected and together defining a mounting groove capable of receiving a rupture disc to be measured in a hydrogen environment, said rupture disc to be measured being disposed in said mounting groove, said clamping and positioning ring having an annular structure and being capable of clamping said rupture disc to be measured, such that said rupture disc to be measured and said sealing coverhigh-pressure side delimits a high-pressure cavity, said high-pressure cavity being in communication with an external high-pressure hydrogen source, said measuring rod sliding through said sealing cover on the low-pressure side to abut against the upper face of said rupture disc to be measured. 20

[0007] Preferably, said mounting groove is disposed on the high-pressure side of said sealing cover facing said low-pressure side sealing cover, a trapezoidal sealing groove is also disposed on the lower surface of said mounting groove, a sealing element is disposed in said trapezoidal sealing groove, said sealing element having an annular structure and abutting against the side of said disc. 25 deruptàmée remote du ditcouvred sealing cover sur la low pressure, ladite-tanglee-de-positionant-lentant leditquerupte-mée ledite-mée-element-sée, situ que ledite-derupte-mée-leditcouvre-méehigh pressure delimit said high pressure cavity in a sealed manner.

[0008] Preferably, the end with the larger opening of said trapezoidal sealing groove 30 BE2026 / 7262 5 is oriented towards said mounting groove; the cross-sectional shape of said sealing element in the tightened state is adapted to the cross-sectional shape of said trapezoidal sealing groove, in order to achieve a sealing objective.

[0009] Preferably, said high pressure sealing cover has a high pressure hydrogen passage, one end of which communicates with said high pressure cavity, and 5 another end is in communication with said external high pressure hydrogen source; Said end of said high-pressure hydrogen passage in communication with said external high-pressure hydrogen source comprises a high-pressure inlet chamber, said high-pressure inlet chamber being capable of communicating with said external high-pressure hydrogen source, said high-pressure hydrogen inlet chamberpressure comprising a leak detection orifice of the intake chamber; said high-pressure hydrogen intake chamber is capable of being connected by thread to said external high-pressure hydrogen source, said high-pressure side sealing cover and said low-pressure side sealing cover are connected by thread, both using tapered sealing threads.

[0010] Preferably, the device for measuring the height of the rupture height of a disc in a hydrogen environment further comprises a safety locking element, said safety locking element being capable of fixing the relative position of said high-pressure side sealing cover and said low-pressure side sealing cover; said safety locking element having an annular structure, said low-pressure side sealing cover having a boss structure adapted to said safety locking element, said safety locking element being mounted outside saidlow-pressure side sealing cover, clamping the axial end face of said debossing structure, and said safety locking element being connected to said high-pressure side sealing cover.

[0011] Preferably, said low-pressure side sealing cover has a stepped bore adapted to said clamping and positioning ring, said low-pressure side sealing cover being mounted outside said clamping and positioning ring, and being capable of limiting the axial position of said clamping and positioning ring, so that said clamping and positioning ring clamps said rupture disc to be measured.

[0012] Preferably, the device for measuring the height of the rupture disc in a hydrogen environment further comprises a limiting assembly, said limiting assembly being disposed on said sealing cover on the low-pressure side, said limiting assembly being capable of limiting the extreme sliding position of said measuring rod.5

[0013] Preferably, said limiting assembly comprises a limiting pin, said limiting pin being slidably connected to said sealing cover on the low-pressure side and an elastic element being disposed between them, said measuring rod having a limiting groove adapted to said limiting pin; under the action of said elastic element, said limiting pin comes to a butt against said measuring rod, and during the sliding of said measuring rod, said limiting pin can penetrate into said limiting groove in order to limit the extreme position of said measuring rod; said sealing cover on the low-pressure side has a hydrogen evacuation groove in communication with the external environment; a limiting support is disposed on the low-pressure side of the sealing cover, 15 said limiting pin being slidably connected to said limiting support and having an L-shape.

[0014] Preferably, said limiting assembly is provided in several groups, saidgroups of boundary assemblies being uniformly distributed in a circumference around the axis of said measuring rod; said measuring rod has an axial section in the shape of an inverted T, sealing gaskets are mounted at both axial ends of said measuring rod, and during the back-and-forth movement of said measuring rod, said sealing gaskets are capable of closing the space between said measuring rod and said sealing cover on the low-pressure side.

[0015] Preferably, said device for measuring the height of the rupture disc 25 in a hydrogen environment comprises, in addition, a frame unit, said frame unit comprising an overall frame and a base, said measuring unit and said action unit both being disposed inside said overall frame, said rangefinder being connected to said overall frame, said high-pressure side sealing cover being connected to said base, and said base being connected to said overall frame. 30 BE2026 / 7262 7

[0016] Compared to the prior art, the present invention achieves the following technical effectsThe following: The device for measuring the height of a rupture disc in a hydrogen environment according to the invention comprises a measuring unit and an action unit, the measuring unit comprising a rangefinder and a measuring rod, the rangefinder being located directly above the measuring rod and capable of monitoring the displacement of the measuring rod; the action unit comprises a high-pressure side sealing cover, a low-pressure side sealing cover, and a clamping and positioning ring, the high-pressure side sealing cover and the low-pressure side sealing cover being removably connected and together defining a mounting groove capable of receiving a rupture disc to be measured, the rupture disc to be measured being disposed in the mounting groove, the clamping and positioning ring. positioning having an annular structure and capable of clamping the rupture disc to be measured, so that the rupture disc to be measured and the high-pressure side sealing cover delimit a high-pressure cavity, the high-pressure cavity being in communication with a sourceexternal high-pressure hydrogen, measuring rod sliding through the sealing cover on the low-pressure side to come to rest against the upper face of the disc 15 of rupture to be measured.

[0017] In the device for measuring the crown height of a rupture disc in a hydrogen environment according to the present invention, during measurement, an external high-pressure hydrogen source supplies the high-pressure cavity with high-pressure hydrogen. Under the effect of the ultra-high-pressure hydrogen, the rupture disc to be measured undergoes a dynamic deformation 20 from its central position, causing the measuring rod, supported against said disc, to slide relative to the sealing cover on the low-pressure side. The rangefinder makes it possible to monitor the displacement of the measuring rod, thus achieving real-time monitoring of the evolution of the crown height of the rupture disc during the rupture process in a hydrogen environment. In the device according to the invention, the sealing cover on the side 25The high-pressure and low-pressure sealing cover define the mounting groove that can receive the rupture disc to be measured, and the covers are removable, which facilitates the installation of the rupture disc to be measured. The use of the clamping and positioning ring to tighten the rupture disc to be measured guarantees the sealing of the high-pressure cavity and the smooth running of the measurements. In the device for measuring the arch height of a rupture disc in a hydrogen environment according to the present invention, the rupture disc to be measured transmits the deformation information via the measuring rod, which solves the technical problem of the difficulty of measuring the pre-formed arch height and the arch height at rupture of a rupture disc to be measured in a high-hydrogen environment. The 400 MPa pressure, encountered in the prior art, achieves precise collection of the 5 parameters ranging from deformation to rupture of the rupture disk in a hydrogen environment, and provides solid support for promoting the sustainable development of discharge devicessafety of hydrogen storage cylinders. BRIEF DESCRIPTION OF DRAWINGS 10

[0018] In order to explain more clearly the technical solutions of the embodiments of the invention or the prior art, the drawings necessary for the description of the embodiments will be briefly presented below. It is evident that the drawings described below represent only some embodiments of the invention. For a person skilled in the art, other drawings can be obtained from these drawings without creative effort. 15

[0019] Fig. 1 is a schematic view of the structure of the device for measuring the height of the arch of a rupture disk in a hydrogen environment according to an embodiment of the present invention; Fig. 2 is a schematic view of part of the structure of the device for measuring the height of a rupture disc in a hydrogen environment according to one embodiment of the present invention; Fig. 3 is a schematic cross-sectional view of the high-pressure side sealing cover of the device for measuring the height of a rupture disc in a hydrogen environmenthydrogen according to an embodiment of the present invention; Fig. 4 is a schematic top view of the high-pressure side sealing cover 25 of the device for measuring the height of the rupture height of a disc in a hydrogen environment according to an embodiment of the present invention; Fig. 5 is a schematic cross-sectional view of the low-pressure side sealing cover of the device for measuring the height of the rupture height of a disc in a hydrogen environment according to an embodiment of the present invention; 30 BE2026 / 7262 9 Fig. 6 is a schematic top view of the low-pressure side sealing cover of the device for measuring the height of the rupture height of a disc in a hydrogen environment according to an embodiment of the present invention; Fig. 7 is a schematic cross-sectional view of the measuring rod of the device for measuring the height of the crown of a rupture disc in a hydrogen environment according to one embodiment of the present invention; Fig. 8 is a schematic cross-sectional view of the clamping and positioning rod.of the device for measuring the height of the rupture of a disc in a hydrogen environment according to an embodiment of the present invention.

[0020] Key to the figures: 1, rangefinder; 2, measuring rod; 3, high-pressure side sealing cover; 4, low-pressure side sealing cover; 5, clamping and positioning ring; 6, trapezoidal sealing groove; 7, high-pressure hydrogen passage; 8, high-pressure inlet chamber; 9, leak detection orifice of the inlet chamber; 10, limitation assembly; 11, limitation pin; 12, limitation groove; 13, hydrogen vent groove; 14, limitation support; 15, overall frame; 16, base; 17, mounting groove; 18, hydrogen environment rupture disc; 19, safety locking element; 20, sealing gasket; 21, sealing gasket groove; 22, sealing element. DETAILED DESCRIPTION 20

[0021] The present invention will be described below clearly and completely in conjunction with the drawings of embodiments of the invention. Obviously, the embodimentsThe embodiments described are only a part of the embodiments of the invention, and not the whole. All other embodiments obtained by a person skilled in the art without creative effort on the basis of the embodiments of the invention fall within the scope of protection of the invention. 25

[0022] The objective of the present invention is to provide a device for measuring the deflection height of a rupture disc in a hydrogen environment, to solve the existing problems of the aforementioned prior art, to allow the measuring device to perform a continuous and dynamic measurement of the deflection height of the rupture disc in a hydrogen environment, and to accurately capture the entire process from the deformation to the rupture of the disc, thus providing technical support to promote the Sustainable development of safety discharge devices for hydrogen storage cylinders.

[0023] To make the objectives, features, and advantages of the present invention more evident and understandable, the invention is described below in more detail in 5conjunction with the specific drawings and embodiments.

[0024] Embodiment 1 The present embodiment provides a device for measuring the curvature height of a rupture disk in a hydrogen environment. With reference to