Arch height measuring device of rupture disk in hydrogen environment

Abstract

The invention relates to the field of rupture disk testing, and discloses an arch height measuring device for a rupture disk in a hydrogen environment, the arch height measuring device comprises a measuring unit and an action unit, the measuring unit comprises an infrared distance meter and a measuring rod, and the action unit comprises a high-pressure side sealing end cover, a low-pressure side sealing end cover and a compression positioning ring. During measurement, an external high-pressure hydrogen source conveys high-pressure hydrogen into the high-pressure cavity, under driving of the ultrahigh-pressure hydrogen, the to-be-measured hydrogen rupture disk generates dynamic deformation from the middle position, the measuring rod abutting against the to-be-measured hydrogen rupture disk is driven to slide relative to the low-pressure side sealing end cover, and the infrared distance meter can monitor displacement of the measuring rod. Therefore, the arch height change of the rupture disk in the blasting process in the hydrogen environment can be monitored in real time. The hydrogen rupture disk to be measured transmits deformation information by using the measuring rod, so that accurate acquisition of parameters of the rupture disk from deformation to blasting in a hydrogen high-pressure environment is realized, and a powerful guarantee is provided for promoting long-acting development of a safety relief device of a hydrogen storage cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rupture disc testing in a hydrogen environment, and particularly relates to an arch height measuring device for a rupture disc in a hydrogen environment. BACKGROUND

[0002] Hydrogen energy is a secondary energy source that is abundant in source, green and low-carbon, and widely used. Developing hydrogen energy industry has become an important strategic choice for global energy transformation and upgrading and cultivating new economic growth points. Safe and efficient hydrogen storage and transportation equipment is the core guarantee for hydrogen utilization, and safe relief technology for hydrogen storage and transportation equipment is the most important. Hydrogen is a colorless, transparent, odorless, tasteless, flammable and explosive gas at normal temperature and pressure. The minimum ignition energy of hydrogen is 0.02 MJ, the explosion limit in air is 4.2% to 74%, and the explosion limit in oxygen is 5.0% to 94.3%. Hydrogen has the characteristics of large diffusion coefficient, wide explosion limit, low ignition energy, etc. Once a large amount of high-pressure hydrogen stored in a limited space of a vehicle leaks, it will cause a violent explosion when encountering sparks or high temperature, which poses a serious threat to life and property safety.

[0003] At present, hydrogen storage technologies mainly include high-pressure gaseous hydrogen storage, cryogenic liquid hydrogen storage, metal hydride hydrogen storage, and organic liquid hydrogen storage. Among these technologies, high-pressure gaseous hydrogen storage has become the most mature hydrogen storage and transportation method due to its low cost, low energy consumption, simple equipment structure, fast charging and discharging speed, and many other advantages. Secondly, liquid hydrogen is also widely used due to its large energy storage scale, low cost, wide application field, and high energy density of 70.78 kg / m 3The density of hydrogen is low, and it has great development potential in the field of energy storage. With the continuous development of hydrogen storage technology, the safety of new hydrogen storage equipment is increasingly concerned. Sudden conditions or accidents such as fire may cause a sudden increase in pressure in the container, so it is crucial to install a safety relief device in high-pressure gaseous hydrogen storage equipment to ensure the stability and safety of the equipment, thereby ensuring the safety of personnel and equipment. According to the provisions of T / CATSI05008-2023 “Special Technical Requirements for Compressed Hydrogen Aluminum Liner Carbon Fiber Full-winding Bottle-type Container” and the investigation, the safety relief device used in the currently developed 52MPa compressed hydrogen aluminum liner carbon fiber full-winding bottle-type container is a combination of a hydrogen-approaching rupture disc and a fusible alloy plug. According to the provisions of T / CATSI05006-2021 “Special Technical Requirements for Fixed Vacuum Insulated Liquid Hydrogen Pressure Vessels” and T / CATSI05007-2023 “Special Technical Requirements for Mobile Vacuum Insulated Liquid Hydrogen Pressure Vessels”, one of the safety relief devices for liquid hydrogen storage tanks and liquid hydrogen tank trucks is a combination of a safety valve and a hydrogen-approaching rupture disc device. Based on the above usage scenarios, the hydrogen-approaching rupture disc, as an indispensable safety accessory in chemical equipment, containers, and pipelines, is receiving increasing attention. It not only prevents catastrophic overpressure in chemical equipment to avoid major accidents, but also ensures the safety of chemical equipment operators. Therefore, the hydrogen-approaching rupture disc safety relief device is often used as the last safety barrier for chemical equipment protection.

[0004] Due to the low density, wide explosion limit range, and relatively low minimum ignition energy of hydrogen, hydrogen-approaching systems face significant safety risks such as ignition and explosion caused by hydrogen overpressure leakage. Therefore, the safety relief problem in hydrogen-approaching systems is particularly critical. Currently, domestic and foreign scholars have conducted in-depth research on factors such as the forming arch height, pressure ring fillet, and cyclic creep of hydrogen-approaching rupture discs. Numerous research results have gradually optimized the design and manufacturing parameters during the processing and forming of hydrogen-approaching rupture discs. To date, a set of calculation methods suitable for industrial design has been developed for conventional hydrogen-approaching rupture discs through systematic experimental research. However, the working conditions of hydrogen storage equipment operating in a hydrogen environment are complex and demanding, and the material selection, bursting performance, failure mechanism, sealing performance, and relief characteristics of hydrogen-approaching rupture discs need to be further explored. In addition, the existing hydrogen-approaching rupture disc-related tests do not mention the experimental requirements and experimental devices for testing the arch height of hydrogen-approaching rupture discs in a hydrogen environment. There is still a lack of research on the dynamic arch height testing of hydrogen-approaching rupture discs in a high-pressure hydrogen environment. Therefore, it is necessary to further strengthen the testing and research of hydrogen-approaching rupture discs in a hydrogen environment to accurately evaluate their performance and ensure the safe and stable operation of hydrogen-approaching systems. SUMMARY

[0005] The purpose of the present application is to provide a device for measuring the arch height of a rupture disc in a hydrogen environment, so as to solve the problems of the related art, enable the device to continuously and dynamically measure the arch height of the rupture disc in a hydrogen environment, accurately capture the whole process from deformation to explosion of the rupture disc, and thus provide technical support for promoting the long-term development of the safety relief device for hydrogen storage cylinders.

[0006] To achieve the above-mentioned purpose, the present application provides the following solutions: The present application provides a device for measuring the arch height of a rupture disc in a hydrogen environment, comprising: a measuring unit, which comprises a range finder and a measuring rod, the range finder being located directly above the measuring rod and being capable of monitoring the displacement of the measuring rod; an action unit, which comprises a high-pressure side sealing end cover, a low-pressure side sealing end cover, and a compression positioning ring, the high-pressure side sealing end cover being detachably connected with the low-pressure side sealing end cover, and the two forming an installation groove capable of accommodating a to-be-measured rupture disc in a hydrogen environment, the to-be-measured rupture disc in a hydrogen environment being arranged in the installation groove, the compression positioning ring being annular in structure and being capable of compressing the to-be-measured rupture disc in a hydrogen environment, so that the to-be-measured rupture disc in a hydrogen environment and the high-pressure side sealing end cover form a high-pressure cavity, the high-pressure cavity being in communication with an external high-pressure hydrogen source, and the measuring rod being slidably arranged through the low-pressure side sealing end cover and abutting against the top surface of the to-be-measured rupture disc in a hydrogen environment.

[0007] Preferably, the installation groove is arranged on the side of the high-pressure side sealing end cover facing the low-pressure side sealing end cover, and the bottom surface of the installation groove is further provided with a trapezoidal sealing groove, a sealing element being arranged in the trapezoidal sealing groove, the sealing element being annular in structure and abutting against the side of the to-be-measured rupture disc in a hydrogen environment away from the low-pressure side sealing end cover, and the compression positioning ring compressing the to-be-measured rupture disc in a hydrogen environment and the sealing element, so that the to-be-measured rupture disc in a hydrogen environment and the high-pressure side sealing end cover form a sealed high-pressure cavity.

[0008] Preferably, the larger opening end of the trapezoidal sealing groove is arranged towards the installation groove, and the cross-sectional shape of the sealing element in the compressed state is adapted to the cross-sectional shape of the trapezoidal sealing groove, so as to achieve the sealing purpose.

[0009] Preferably, the high-pressure side sealing end cover has a high-pressure hydrogen passage, one end of the high-pressure hydrogen passage being in communication with the high-pressure cavity, and the other end being in communication with the external high-pressure hydrogen source; The end of the high-pressure hydrogen passage in communication with the external high-pressure hydrogen source has a high-pressure air inlet chamber, the high-pressure air inlet chamber being capable of being in communication with the external high-pressure hydrogen source, and the high-pressure air inlet chamber having an air inlet chamber leak detection hole; The high-pressure intake bin can be threadedly connected with the external high-pressure hydrogen source, the high-pressure side sealing end cover is threadedly connected with the low-pressure side sealing end cover, and both adopt conical sealing threads.

[0010] Preferably, the arch height measuring device of the rupture disc in the hydrogen environment further comprises a safety locking element capable of fixing the relative position of the high-pressure side sealing end cover and the low-pressure side sealing end cover. The safety locking element is in a ring structure, the low-pressure side sealing end cover has a boss structure matched with the safety locking element, the safety locking element is sleeved outside the low-pressure side sealing end cover and presses the axial end face of the boss structure, and the safety locking element is connected with the high-pressure side sealing end cover.

[0011] Preferably, the low-pressure side sealing end cover has a stepped hole matched with the pressing positioning ring, the low-pressure side sealing end cover is sleeved outside the pressing positioning ring and can limit the axial position of the pressing positioning ring so that the pressing positioning ring presses the to-be-measured rupture disc in the hydrogen environment.

[0012] Preferably, the arch height measuring device of the rupture disc in the hydrogen environment further comprises a limiting assembly arranged on the low-pressure side sealing end cover, and the limiting assembly can limit the limit sliding position of the measuring rod.

[0013] Preferably, the limiting assembly comprises a limiting pin slidably connected with the low-pressure side sealing end cover and having an elastic element arranged therebetween, and the measuring rod has a limiting groove matched with the limiting pin; under the action of the elastic element, the limiting pin abuts against the measuring rod, and in the sliding process of the measuring rod, the limiting pin can extend into the limiting groove to limit the limit position of the measuring rod; the low-pressure side sealing end cover has a hydrogen release groove in communication with the external environment. The low-pressure side sealing end cover is provided with a limiting support frame, the limiting pin is slidably connected with the limiting support frame, and the limiting pin is in an L-shaped structure.

[0014] Preferably, the number of the limiting assemblies is multiple, and the limiting assemblies are circumferentially and uniformly arranged around the axis of the measuring rod. The axial section of the measuring rod is in an inverted T shape, the measuring rod is sleeved with a sealing ring at both axial ends, and in the reciprocating sliding process of the measuring rod, the sealing ring can block the gap between the measuring rod and the low-pressure side sealing end cover.

[0015] Preferably, the arch height measuring device of the rupture disc in a hydrogen environment further comprises a rack unit, the rack unit comprises an integral frame and a base, the measuring unit and the action unit are arranged in the integral frame, the range finder is connected with the integral frame, and the high-pressure side sealing end cover is connected with the base.

[0016] The arch height measuring device of the rupture disc in a hydrogen environment has the following technical effects relative to the related art: the arch height measuring device of the rupture disc in a hydrogen environment comprises a measuring unit and an action unit, wherein the measuring unit comprises a range finder and a measuring rod, the range finder is located directly above the measuring rod and can monitor the displacement of the measuring rod; the action unit comprises a high-pressure side sealing end cover, a low-pressure side sealing end cover, and a compression positioning ring, the high-pressure side sealing end cover is detachably connected with the low-pressure side sealing end cover, and the high-pressure side sealing end cover and the low-pressure side sealing end cover enclose an installation groove capable of accommodating a to-be-measured rupture disc in a hydrogen environment, the to-be-measured rupture disc in a hydrogen environment is arranged in the installation groove, the compression positioning ring is in a ring structure and can compress the to-be-measured rupture disc in a hydrogen environment, so that the to-be-measured rupture disc in a hydrogen environment and the high-pressure side sealing end cover enclose a high-pressure cavity, the high-pressure cavity is connected with an external high-pressure hydrogen source, and the measuring rod passes through the low-pressure side sealing end cover and abuts against the top surface of the to-be-measured rupture disc in a hydrogen environment.

[0017] The arch height measuring device of the rupture disc in a hydrogen environment has the following technical effects relative to the related art: the arch height measuring device of the rupture disc in a hydrogen environment comprises a measuring unit and an action unit, wherein the measuring unit comprises a range finder and a measuring rod, the range finder is located directly above the measuring rod and can monitor the displacement of the measuring rod; the action unit comprises a high-pressure side sealing end cover, a low-pressure side sealing end cover, and a compression positioning ring, the high-pressure side sealing end cover is detachably connected with the low-pressure side sealing end cover, and the high-pressure side sealing end cover and the low-pressure side sealing end cover enclose an installation groove capable of accommodating a to-be-measured rupture disc in a hydrogen environment, the to-be-measured rupture disc in a hydrogen environment is arranged in the installation groove, the compression positioning ring is in a ring structure and can compress the to-be-measured rupture disc in a hydrogen environment, so that the to-be-measured rupture disc in a hydrogen environment and the high-pressure side sealing end cover enclose a high-pressure cavity, the high-pressure cavity is connected with an external high-pressure hydrogen source, and the measuring rod passes through the low-pressure side sealing end cover and abuts against the top surface of the to-be-measured rupture disc in a hydrogen environment. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0019] Figure 1 A structure diagram of the rupture disc arch height measuring device in a hydrogen environment disclosed by the embodiments of the present application; Figure 2 A partial structure diagram of the rupture disc arch height measuring device in a hydrogen environment disclosed by the embodiments of the present application; Figure 3 A cross-sectional structure diagram of the high-pressure side sealing end cover of the rupture disc arch height measuring device in a hydrogen environment disclosed by the embodiments of the present application; Figure 4 A top view structure diagram of the high-pressure side sealing end cover of the rupture disc arch height measuring device in a hydrogen environment disclosed by the embodiments of the present application; Figure 5 A cross-sectional structure diagram of the low-pressure side sealing end cover of the rupture disc arch height measuring device in a hydrogen environment disclosed by the embodiments of the present application; Figure 6 A top view structure diagram of the low-pressure side sealing end cover of the rupture disc arch height measuring device in a hydrogen environment disclosed by the embodiments of the present application; Figure 7 A cross-sectional structure diagram of the measuring rod of the rupture disc arch height measuring device in a hydrogen environment disclosed by the embodiments of the present application; Figure 8 A cross-sectional structure diagram of the compression positioning ring of the rupture disc arch height measuring device in a hydrogen environment disclosed by the embodiments of the present application.

[0020] In the figure: 1, range finder; 2, measuring rod; 3, high-pressure side sealing end cover; 4, low-pressure side sealing end cover; 5, compression positioning ring; 6, trapezoidal sealing groove; 7, high-pressure hydrogen gas passage; 8, high-pressure gas inlet bin; 9, gas inlet bin leak detection hole; 10, limiting assembly; 11, limiting pin; 12, limiting groove; 13, hydrogen gas discharge groove; 14, limiting support frame; 15, overall frame; 16, base; 17, mounting groove; 18, to-be-measured hydrogen rupture disc; 19, safety locking element; 20, sealing ring; 21, sealing ring groove; 22, sealing element. DETAILED DESCRIPTION

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The purpose of this invention is to provide a device for measuring the arch height of a rupture disc in a hydrogen-exposed environment, so as to solve the problems existing in the above-mentioned related technologies. The device can continuously and dynamically measure the arch height of a rupture disc in a hydrogen-exposed environment, accurately capture the entire process of the rupture disc from deformation to explosion, and thus provide technical support for promoting the long-term development of safe release devices for hydrogen storage cylinders.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1 This embodiment provides a device for measuring the arch height of a rupture disc in a hydrogen-containing environment. Please refer to [reference needed]. Figures 1-8 The device includes a measuring unit and an action unit. The measuring unit includes a rangefinder 1 and a measuring rod 2. The rangefinder 1 is located directly above the measuring rod 2 and can monitor the displacement of the measuring rod 2. The action unit includes a high-pressure side sealing end cap 3, a low-pressure side sealing end cap 4, and a clamping positioning ring 5. The high-pressure side sealing end cap 3 and the low-pressure side sealing end cap 4 are detachably connected and form an installation groove 17 that can accommodate the hydrogen rupture disc 18 to be tested. The hydrogen rupture disc 18 to be tested is placed in the installation groove 17. The clamping positioning ring 5 is a ring structure and can clamp the hydrogen rupture disc 18 to be tested, so that the hydrogen rupture disc 18 to be tested and the high-pressure side sealing end cap 3 form a high-pressure cavity. The high-pressure cavity is connected to an external high-pressure hydrogen source. The measuring rod 2 can slide through the low-pressure side sealing end cap 4 and abut against the top surface of the hydrogen rupture disc 18 to be tested.

[0025] The arch height measuring device of the hydrogen environment blast sheet, when measuring, the external high-pressure hydrogen source sends high-pressure hydrogen into the high-pressure cavity, under the driving of the super-high-pressure hydrogen, the measured hydrogen blast sheet 18 generates dynamic deformation from the middle position, drives the measuring rod 2 opposite to the measured hydrogen blast sheet 18 to slide relative to the low-pressure side sealing end cover 4, the range finder 1 can monitor the displacement of the measuring rod 2, so that the change of the arch height of the hydrogen environment blast sheet in the blasting process is realized in real time. The arch height measuring device of the hydrogen environment blast sheet, the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4 form an installation groove 17 capable of accommodating the measured hydrogen blast sheet 18, and the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4 are detachable, which facilitates the installation of the measured hydrogen blast sheet 18, and the compression positioning ring 5 is used to compress the measured hydrogen blast sheet 18, so as to ensure the sealing of the high-pressure cavity and the smooth progress of the measurement work. The arch height measuring device of the hydrogen environment blast sheet, the measured hydrogen blast sheet 18 transmits deformation information through the measuring rod 2, solves the technical problems of the pre-arch height of the measured hydrogen blast sheet 18 in the 400MPa high-pressure hydrogen environment and the arch height measurement difficulty in blasting, realizes the accurate collection of the hydrogen environment blast sheet from deformation to blasting parameters, and provides a strong guarantee for promoting the long-term development of the hydrogen storage cylinder safety relief device.

[0026] Among them, the installation groove 17 is arranged on the side of the high-pressure side sealing end cover 3 facing the low-pressure side sealing end cover 4, the specification of the installation groove 17 matches the specification of the measured hydrogen blast sheet 18, so that the measured hydrogen blast sheet 18 can be arranged in the installation groove 17. In order to ensure the sealing of the high-pressure cavity, the bottom surface of the installation groove 17 is also provided with a trapezoidal sealing groove 6, and a sealing element 22 is arranged in the trapezoidal sealing groove 6. The sealing element 22 is an annular structure, the sealing element 22 abuts against the side of the measured hydrogen blast sheet 18 away from the low-pressure side sealing end cover 4, and the compression positioning ring 5 compresses the measured hydrogen blast sheet 18 and the sealing element 22, so that the measured hydrogen blast sheet 18 and the high-pressure side sealing end cover 3 form a sealed high-pressure cavity, avoiding the leakage of hydrogen into the high-pressure cavity, and ensuring the measurement accuracy.

[0027] It should be noted that in the specific embodiment, the larger opening end of the trapezoidal sealing groove 6 is arranged towards the mounting groove 17; the cross-sectional shape of the sealing element 22 in the compressed state is matched with the cross-sectional shape of the trapezoidal sealing groove 6 to achieve the sealing purpose. The trapezoidal sealing groove 6 and the sealing element 22 adopt the trapezoidal cross-sectional shape to form a self-tightening structure, which has an automatic compensation effect under the wedging action of hydrogen pressure, thereby further improving the sealing stability and reliability while ensuring the sealing performance between the high-pressure side sealing end cover 3 and the to-be-measured hydrogen-approaching rupture disc 18. It should be further noted that the sealing surface of the trapezoidal sealing groove 6 is processed by an ultra-precision grinding process with a grinding wheel granularity of W2.5, and the surface roughness Ra is ≤0.3 μm, which effectively reduces the penetration of hydrogen molecules through the surface micro-cracks and ensures the long-term sealing performance in the hydrogen-approaching high-pressure environment. In actual application, the leakage rate of the measuring device of the present application is ≤1×10 -9 mbar・L / s in a 400 MPa super-high pressure hydrogen environment, and the sealing reliability is high.

[0028] In the specific embodiment, the slope of the trapezoidal sealing groove 6 is 60°-90°, which ensures that the sealing element 22 can be compressed in the trapezoidal sealing groove 6 to achieve the sealing purpose, and realizes automatic compensation under the hydrogen pressure, thereby further ensuring the sealing reliability. Preferably, when the slope of the trapezoidal sealing groove 6 is 70° and the sealing element 22 is an O-ring under high-pressure working conditions, the Mises stress between the sealing element 22 and the trapezoidal sealing groove 6 is the smallest, and the contact stress is the largest. When the O-ring is arranged in the trapezoidal sealing groove 6 for sealing, it is less likely to be torn, cracked or damaged in other ways that affect the material performance compared to other angle grooves, and at the same time, it can achieve better sealing effect. Therefore, in the specific embodiment that can be realized by the present application, the slope of the trapezoidal sealing groove 6 is 70°, which can further enhance the sealing performance between the high-pressure side sealing end cover 3 and the to-be-measured hydrogen-approaching rupture disc 18, ensure the sealing reliability, and at the same time, be beneficial to prolong the service life of the device. In actual application, the slope of the trapezoidal sealing groove 6 can be adjusted according to actual needs to meet different measurement working conditions and improve the flexible adaptability of the measuring device.

[0029] Specifically, the high-pressure side sealing end cover 3 has a high-pressure hydrogen passage 7, one end of the high-pressure hydrogen passage 7 is in communication with the high-pressure cavity, and the other end is in communication with an external high-pressure hydrogen source; the hydrogen gas delivered by the external high-pressure hydrogen source is delivered to the high-pressure cavity through the high-pressure hydrogen passage 7, and contacts the to-be-measured hydrogen-approaching rupture disc 18 to drive the to-be-measured hydrogen-approaching rupture disc 18 to deform.

[0030] In other specific embodiments that can be implemented by the present application, the high-pressure hydrogen gas passage 7 has a high-pressure gas inlet chamber 8 at one end connected to an external high-pressure hydrogen gas source. The high-pressure gas inlet chamber 8 can be connected to the external high-pressure hydrogen gas source, and the high-pressure hydrogen gas passage 7 is connected to the external high-pressure hydrogen gas source through the high-pressure gas inlet chamber 8, further ensuring the smooth delivery of high-pressure hydrogen gas, and facilitating the stability of hydrogen gas delivery. The high-pressure gas inlet chamber 8 has a gas inlet chamber leak detection hole 9, which can be connected to a leak detection instrument for leak detection, avoiding the influence of hydrogen leakage on measurement data.

[0031] More specifically, the high-pressure gas inlet chamber 8 can be threadedly connected to the external high-pressure hydrogen gas source, and the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4 are threadedly connected, and both use tapered sealing threads. The threaded connection is fast and convenient to disassemble and assemble, and the sealing threads can ensure the sealing property of the connection.

[0032] In this specific embodiment, the external threads of the low-pressure side sealing end cover 4 and the high-pressure side sealing end cover 3 are made of precipitation-hardened stainless steel with excellent hydrogen embrittlement resistance, combined with nitriding treatment and tooth root arc transition design, so that the threads have no plastic deformation in 400MPa ultra-high pressure testing. The shear strength of the threads is improved by 60% compared with the 316L stainless steel threads in the prior art. Through the high shear strength design, the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4 are connected with high strength and rigidity, and effectively resist the shear force of the threads during ultra-high pressure testing, improving the working reliability of the measuring device.

[0033] The arch height measuring device for the hydrogen environment blast sheet of the present application also includes a safety locking element 19, which can fix the relative position of the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4, ensure the connection stability of the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4, further improve the structural stability of the measuring device, and avoid the separation of the high-pressure side sealing end cover 3 from the low-pressure side sealing end cover 4 under the impact of high-pressure hydrogen gas when the measured hydrogen blast sheet 18 is blasted, improving the measurement safety of the measuring device, and prolonging the service life of the measuring device.

[0034] In the specific embodiment, the safety locking element 19 is annular, the low-pressure side sealing end cover 4 has a boss structure matched with the safety locking element 19, the safety locking element 19 is sleeved outside the low-pressure side sealing end cover 4 and presses the axial end face of the boss structure, and on the basis of the threaded connection of the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4, the reliability of the connection of the two is further ensured. The safety locking element 19 is arranged in the application, and even if the sealing fails and the connection of the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4 fails in the test process, the safety locking element 19 can still lock the low-pressure side sealing end cover 4 and the high-pressure side sealing end cover 3, fix the relative position of the two, avoid the low-pressure side sealing end cover 4 from “flying out” and separating from the high-pressure side sealing end cover 3 under the high-pressure impact of hydrogen, and further ensure the working reliability and operation safety of the measuring device. In the specific embodiment, the safety locking element 19 is connected with the high-pressure side sealing end cover 3, and in actual application, the safety locking element 19 can also be connected with the rack unit, effectively fix the relative position of the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4, and improve the structural stability of the device. In addition, the safety locking element 19 adopts an annular structure, effectively improves the stress uniformity of the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4, is conducive to ensuring the safe performance of the test process, and prolongs the service life of the measuring device.

[0035] At the same time, the low-pressure side sealing end cover 4 has a stepped hole matched with the pressing positioning ring 5, the low-pressure side sealing end cover 4 is sleeved outside the pressing positioning ring 5 and can limit the axial position of the pressing positioning ring 5, so that the pressing positioning ring 5 presses the to-be-tested hydrogen proximity burst disc 18. The low-pressure side sealing end cover 4 is threadedly connected with the high-pressure side sealing end cover 3, while limiting the axial displacement of the pressing positioning ring 5, so that the pressing positioning ring 5 can press the to-be-tested hydrogen proximity burst disc 18, ensure the smooth performance of the measuring work, and has a simple and compact structure.

[0036] It also needs to be emphasized that the arch height measuring device for the hydrogen proximity burst disc in the application further comprises a limiting assembly 10 arranged on the low-pressure side sealing end cover 4, and the limiting assembly 10 can limit the limit sliding position of the measuring rod 2, so as to avoid that the measuring rod 2 slides under the action of hydrogen to cause damage to the device after the to-be-tested hydrogen proximity burst disc 18 bursts in the measuring process, and improve the measuring safety of the device.

[0037] Further, in the specific embodiment, the limiting assembly 10 comprises a limiting pin 11 which is slidably connected with the low-pressure side sealing end cover 4 and an elastic element is arranged therebetween, and the measuring rod 2 is provided with a limiting groove 12 matched with the limiting pin 11; under the action of the elastic element, the limiting pin 11 abuts against the measuring rod 2, and in the sliding process of the measuring rod 2, the limiting pin 11 can extend into the limiting groove 12 to limit the extreme position of the measuring rod 2, thereby ensuring the reliability and safety of the reciprocating movement of the measuring rod 2. After the to-be-measured hydrogen environment blast disk 18 is blasted, the measuring rod 2 slides under the blasting impact, and when it slides to the extreme position, the limiting pin 11 extends into the limiting groove 12 to fix the axial position of the measuring rod 2, thereby effectively avoiding the damage of the device caused by the sliding dislocation of the measuring rod 2. It should be further pointed out that the arch height measuring device of the hydrogen environment blast disk in the present application is provided with a hydrogen discharge groove 13 on the low-pressure side sealing end cover 4, the hydrogen discharge groove 13 is connected with the external environment, after the to-be-measured hydrogen environment blast disk 18 is blasted, the hydrogen is discharged from the hydrogen discharge groove 13 to the external environment or other collection equipment, thereby preventing the safety accident caused by the high-speed injection of hydrogen, effectively avoiding the occurrence of safety accidents in the measuring process, and improving the safety factor of the arch height measuring device of the hydrogen environment blast disk. In the specific embodiment, the hydrogen discharge groove 13 is annular, and the hydrogen discharge groove 13 can be connected with the external discharge pipeline to smoothly guide the directional discharge of hydrogen, thereby improving the safety factor of the device in the measuring process.

[0038] It should be pointed out here that in the 400MPa high-pressure hydrogen environment blast disk blasting measurement test, in view of the characteristics of high-pressure hydrogen, flammable and explosive, and strong permeability, the present application constructs a safe discharge channel by using the hydrogen discharge groove 13 connected with the external environment and the external discharge pipeline, thereby ensuring the rapid and stable discharge of hydrogen after blasting, avoiding the operator and the fire source, and far away from the hydrogen explosion limit, thereby ensuring the test safety.

[0039] In the specific embodiment, the axial section of the measuring rod 2 is inverted T-shaped, the sealing rings 20 are sleeved on the axial two ends of the measuring rod 2, and the sealing rings 20 on the axial two ends of the measuring rod 2 can always block the gap between the measuring rod 2 and the low-pressure side sealing end cover 4 during the reciprocating sliding of the measuring rod 2 relative to the low-pressure side sealing end cover 4, so as to form a sealed structure, and after the to-be-tested hydrogen proximity bursting disc 18 is burst, the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4 can still surround a sealed cavity, the hydrogen is discharged from the external discharge pipeline through the hydrogen discharge groove 13, the safe discharge is realized, the safety accident caused by the sudden outflow of high-pressure hydrogen is avoided, and the safety of the operator is ensured. Specifically, the sealing rings 20 arranged on the axial two ends of the measuring rod 2 are sleeved on the smaller diameter section of the measuring rod 2, one end of the sealing ring 20 is located between the measuring rod 2 and the through hole of the low-pressure side sealing end cover 4, so as to ensure the sealing between the two during the reciprocating sliding of the measuring rod 2 along the through hole of the low-pressure side sealing end cover 4; the other end of the sealing ring 20 abuts against the end face of the larger diameter section of the measuring rod 2, and when the measuring rod 2 slides upward to the limit position, the gap between the measuring rod 2 and the opening of the through hole of the low-pressure side sealing end cover 4 is blocked, so that after the to-be-tested hydrogen proximity bursting disc 18 is burst, the high-pressure side sealing end cover 3 and the low-pressure side sealing end cover 4 can still surround a sealed cavity, and the sealing reliability of the device is improved; in actual application, the sealing ring groove 21 matched with the sealing ring 20 is arranged on the measuring rod 2, so as to ensure the structural stability of the sealing ring 20. In addition, in actual application, a plurality of groups of sealing rings 20 can be arranged on the axial two ends of the measuring rod 2, so as to further enhance the sealing effect and ensure the sealing reliability.

[0040] Meanwhile, when the measuring rod 2 slides upward to the limit position and the limiting pin 11 extends into the limiting groove 12, the structural stability of the measuring rod 2 is ensured, the sliding dislocation of the measuring rod 2 during the hydrogen discharge process is avoided, and the measurement operation safety of the measuring device is further ensured.

[0041] Further, the limiting support frame 14 is arranged on the low-pressure side sealing end cover 4, the limiting pin 11 is slidably connected with the limiting support frame 14, and the number of the limiting support frames 14 can be two groups, so as to further improve the sliding reliability of the limiting pin 11 and avoid the dislocation of the limiting pin 11. In the specific embodiment, the limiting pin 11 is L-shaped, the disassembly and assembly operation is convenient, and the limiting function is also achieved.

[0042] In other specific embodiments that can be implemented by the present application, the number of the limiting assemblies 10 can be multiple groups, and the limiting assemblies 10 are circumferentially and uniformly arranged around the axis of the measuring rod 2, so as to improve the force uniformity of the measuring rod 2 and further ensure the stability of the sealing structure formed between the measuring rod 2 and the low-pressure side sealing end cover 4 after the measuring rod 2 slides upward.

[0043] The arch height measuring device of the rupture disc under the hydrogen environment further comprises a rack unit, the rack unit comprises an integral frame 15 and a base 16, the measuring unit and the action unit are arranged in the integral frame 15, the range finder 1 is connected with the integral frame 15, the high-pressure side sealing end cover 3 is connected with the base 16, and the base 16 is connected with the integral frame 15.

[0044] The integral frame 15 provides a stable mounting basis for the measuring unit and the action unit, ensures the structural reliability of the device as a whole, and is provided with the base 16 at the bottom of the action unit, thereby providing stable support for the action unit and facilitating the connection of the high-pressure side sealing end cover 3 with the external high-pressure hydrogen source.

[0045] In actual application, the integral frame 15 is provided in a sealed structure, the inner cavity of the integral frame 15 forms a sealed test space, and the measuring unit and the action unit are arranged in the sealed test space of the integral frame 15, so that the measurement safety can be further improved, the operation safety factor of the operator can be further improved, and the operation safety of the arch height measurement of the rupture disc under the hydrogen environment can be ensured.

[0046] In the specific embodiment, the range finder 1 is an infrared range finder, which has high measurement accuracy and is conducive to improving the measurement efficiency. The infrared range finder is installed on the integral frame 15 above the action unit, the hydrogen discharge groove 13 of the present application and the safety discharge channel formed by the external discharge pipeline ensure the smooth discharge of high-pressure hydrogen, avoid the accumulation of hydrogen in the internal to reach the explosion limit, avoid the explosion risk, and improve the test safety of the measuring device.

[0047] In other specific embodiments that can be implemented by the present application, the arch height measuring device of the rupture disc under the hydrogen environment further comprises a control unit, the measuring unit and the action unit are in communication connection with the control unit, the input of hydrogen is facilitated, the precise capture of the arch height dynamic deformation of the rupture disc under the hydrogen high-pressure environment and the real-time transmission of data can be realized, and the measurement efficiency of the measuring device is improved. It should be explained here that the structure and working principle of the control unit are known to those skilled in the art, and will not be described here.

[0048] The arch height measuring device of the hydrogen environment under the bursting disc realizes the full-process dynamic monitoring of the deformation to the blasting of the to-be-measured hydrogen bursting disc 18, relies on the synchronous displacement of the measuring rod 2 with the deformation of the to-be-measured hydrogen bursting disc 18, records the deformation process and parameters in real time through the range finder 1, realizes the accurate collection of the deformation parameters of the to-be-measured hydrogen bursting disc 18 in the hydrogen high-pressure environment and the synchronous transmission of data. At the same time, the limiting groove 12 is arranged on the measuring rod 2, the limiting assembly 10 is arranged on the upper end face of the low-pressure side sealing end cover 4, and the two are cooperated to make the sealing ring 20 sleeved on the measuring rod 2 tightly fit with the lower end face of the low-pressure side sealing end cover 4 to form rapid sealing, effectively prevent high-pressure hydrogen from invading the environment or diffusing disorderly after the to-be-measured hydrogen bursting disc 18 is blasted; and combined with the structural design of the low-pressure side sealing end cover 4, the annular hydrogen discharge groove 13 arranged on the low-pressure side sealing end cover 4 is sealingly connected with the external discharge pipeline, the directional guided discharge of high-pressure hydrogen is realized, and a whole-cycle safety closed loop of “monitoring-blasting-protection” is constructed.

[0049] Embodiment two The arch height measuring device of the hydrogen environment under the bursting disc is provided in the embodiment, in the specific embodiment, the height of the base 16 can be adjusted to meet different measurement requirements, and the flexibility and adaptability of the measuring device are improved.

[0050] The other structures of the arch height measuring device of the hydrogen environment under the bursting disc in the embodiment are the same as those in embodiment one, and will not be described here.

[0051] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above embodiment is only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed. In conclusion, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A device for measuring the height of a rupture disc in a hydrogen environment, characterized in that, The utility model relates to a kind of hydrogen bomb test device, including: Measuring unit, the measuring unit includes range finder and measuring rod, the range finder is located just above the measuring rod, and the displacement of the measuring rod can be monitored; Action unit, the action unit includes high-pressure side sealing end cover, low-pressure side sealing end cover and compression positioning ring, the high-pressure side sealing end cover is detachably connected with the low-pressure side sealing end cover, and the two enclose installation groove capable of accommodating the hydrogen bomb to be measured, the hydrogen bomb to be measured is arranged in the installation groove, the compression positioning ring is annular structure and can compress the hydrogen bomb to be measured, so that the hydrogen bomb to be measured and the high-pressure side sealing end cover enclose high-pressure cavity, the high-pressure cavity is communicated with external high-pressure hydrogen source, the measuring rod is slidably passed through the low-pressure side sealing end cover and is in contact with the top surface of the hydrogen bomb to be measured.

2. The device for measuring the height of the rupture disc in a hydrogen environment according to claim 1, characterized in that: The installation groove is arranged on the side of the high-pressure side sealing end cover towards the low-pressure side sealing end cover, the bottom surface of the installation groove is further provided with trapezoidal sealing groove, the sealing element is arranged in the trapezoidal sealing groove, the sealing element is annular structure, the sealing element is in contact with the side of the hydrogen bomb to be measured away from the low-pressure side sealing end cover, the compression positioning ring compresses the hydrogen bomb to be measured and the sealing element, so that the hydrogen bomb to be measured and the high-pressure side sealing end cover enclose the sealed high-pressure cavity.

3. The device for measuring the arch height of a rupture disc in a hydrogen environment according to claim 2, characterized in that: The larger opening end of the trapezoidal sealing groove is arranged towards the installation groove;The cross-sectional shape of the sealing element in the compressed state is matched with the cross-sectional shape of the trapezoidal sealing groove to achieve the sealing purpose.

4. The device for measuring the height of the dome of the rupture disc in a hydrogen environment according to claim 1, characterized in that: The high-pressure side sealing end cover has a high-pressure hydrogen passage, one end of the high-pressure hydrogen passage is communicated with the high-pressure cavity, and the other end is communicated with the external high-pressure hydrogen source; The end of the high-pressure hydrogen passage communicated with the external high-pressure hydrogen source has a high-pressure air inlet chamber, the high-pressure air inlet chamber can be communicated with the external high-pressure hydrogen source, and the high-pressure air inlet chamber has an air inlet chamber leak detection hole; The high-pressure air inlet chamber can be threadedly connected with the external high-pressure hydrogen source, the high-pressure side sealing end cover and the low-pressure side sealing end cover are threadedly connected, and both adopt conical sealing threads.

5. The device for measuring the height of the arch of the rupture disc in a hydrogen environment according to claim 4, characterized in that: It further includes a safety locking element, which can fix the relative position of the high-pressure side sealing end cover and the low-pressure side sealing end cover; The safety locking element is annular structure, the low-pressure side sealing end cover has a boss structure matched with the safety locking element, the safety locking element is sleeved outside the low-pressure side sealing end cover and compresses the axial end surface of the boss structure, and the safety locking element is connected with the high-pressure side sealing end cover.

6. The device for measuring the height of the dome of the rupture disc in a hydrogen environment according to claim 1, characterized in that: The low-pressure side sealing end cover has a stepped hole matched with the compression positioning ring, the low-pressure side sealing end cover is sleeved outside the compression positioning ring and can limit the axial position of the compression positioning ring, so that the compression positioning ring compresses the hydrogen bomb to be measured.

7. The device for measuring the height of the arch of the rupture disc in a hydrogen environment according to any one of claims 1 to 6, characterized in that: It further includes a limiting assembly arranged on the low-pressure side sealing end cover, which can limit the limit sliding position of the measuring rod.

8. The device for measuring the height of the arch of the rupture disc in a hydrogen environment according to claim 7, characterized in that: The limiting assembly comprises a limiting pin slidably connected with the low-pressure side sealing end cover and provided with an elastic element therebetween, and the measuring rod is provided with a limiting groove matched with the limiting pin; under the action of the elastic element, the limiting pin abuts against the measuring rod, and during the sliding of the measuring rod, the limiting pin can extend into the limiting groove to limit the extreme position of the measuring rod; the low-pressure side sealing end cover is provided with a hydrogen discharge groove in communication with the external environment; The limiting pin is slidably connected with a limiting support frame provided on the low-pressure side sealing end cover; the limiting pin has an L-shaped structure.

9. The device for measuring the height of the arch of the rupture disc in a hydrogen environment according to claim 7, characterized in that: The limiting assembly is circumferentially and evenly arranged around the axis of the measuring rod. The axial section of the measuring rod is inverted T-shaped, and the measuring rod is provided with a sealing ring at each axial end, and during the reciprocating sliding of the measuring rod, the sealing ring can block the gap between the measuring rod and the low-pressure side sealing end cover.

10. The device for measuring the height of the arch of the rupture disc in a hydrogen environment according to any one of claims 1 to 6, characterized in that: Further comprising a rack unit comprising an integral frame and a base, the measuring unit and the action unit are arranged in the integral frame, the range finder is connected with the integral frame, and the high-pressure side sealing end cover is connected with the base, and the base is connected with the integral frame.

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