Comparison equipment for hydrostatic test of marine instrument

Abstract

The utility model discloses a hydraulic pressure test comparison device for an ocean instrument. The hydraulic pressure test comparison device comprises a compared hydraulic pressure test system and a hydraulic pressure test comparison device, the hydrostatic test comparison device comprises a pressure-resistant cabin shell, a sealing end cover I, a sealing end cover II, a sealing adapter assembly and a simulation blasting assembly; a sealing end cover I and a sealing end cover II are respectively mounted at two end interfaces of the pressure-resistant cabin shell to form a complete pressure-resistant cabin; a mounting through hole is formed in the center of the sealing end cover II; the sealing adapter assembly is mounted on the mounting through hole on the inner side of the sealing end cover II; the simulation blasting assembly is installed on the sealing switching assembly. A communication hole I is formed in the center of the sealing adapter assembly, so that the blasting simulation assembly is communicated with the outside of the pressure-resistant cabin. According to the utility model, the problem that no standardized equipment exists in the field of marine instrument environmental adaptability detection in China is fundamentally solved, and the problems that the comparison form is not suitable, the test instruments are not unified, the test instruments do not have trigger actions and the test instruments cannot be quantitatively traced are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of marine instrument environmental adaptability detection, in particular to a marine instrument water pressure test comparison device. Background Art

[0002] Comparison testing is an activity in which multiple laboratories measure or test the same or similar items under pre-specified conditions. It is one of the proficiency verification activities officially required by CNAS and an important external quality evaluation activity for laboratories. For conformity assessment bodies (laboratories), proficiency verification includes inter-laboratory comparison testing, one-to-one measurement audits, and professional proficiency verification tests organized by authorized parties.

[0003] In the field of marine instrument environmental adaptability testing, mature and common proficiency verification projects include temperature test, humidity test, vibration test, impact test and salt spray corrosion test, etc. At present, most of these proficiency verification projects have standard and unified comparison devices, such as: measuring the temperature / humidity trigger conditions, testing the resonance frequency, testing the impact trigger conditions and testing the corrosion area through standard blind samples, etc. However, there is currently no unified comparison device for water pressure tests in the marine field, so the water pressure comparison test is still in a blank state.

[0004] The water pressure test uses fresh water as the pressurized medium and a pressure container as the test environment. The instrument under test is placed in it, and water is injected into the pressure container by controlling the booster pump to reach the predetermined test pressure, simulating the pressure conditions of the instrument under test in the deep sea environment. This type of test is used to assess the structural integrity and sealing of the instrument under test, and is a necessary test item before the field application of sea-related underwater instruments. At present, various marine-related research institutes, universities, and production and R&D companies across the country have built pressure test containers of different sizes and specifications, and the test pressures range from 1MPa (equivalent to 100 meters of water depth) to 120MPa (equivalent to 12,000 kilometers of water depth), which can meet the global marine underwater environment testing needs.

[0005] In the absence of a unified means of water pressure comparison, most of the current tests are carried out using the same instrument under test, with different personnel conducting two independent tests to complete the comparison purpose, thereby meeting the requirements of the corresponding proficiency verification project.

[0006] However, the above traditional water pressure comparison test method has the following problems or shortcomings:

[0007] 1. The comparison form is not suitable. In the past, the verification activities carried out by various institutions (laboratories) on their own should be strictly defined as internal quality control activities, which cannot fully meet the proficiency verification requirements defined by CNAS. According to official requirements, the test should have standardized and uniform instruments to be tested, and can be safely and efficiently transferred between institutions (laboratories). Therefore, in terms of water pressure comparison test proficiency verification activities, China has not yet established a unified and standardized test method, and it is urgent to establish a standardized method.

[0008] 2. The test instruments are not unified. Since different institutions (laboratories) use different instruments to conduct proficiency tests, there is no standard water pressure comparison test device. Instead, they randomly use their own daily test instruments (such as metal pressure chambers, carbon fiber pressure chambers, floating materials, etc.) to conduct tests. This means that even if the operator uses the same method to conduct two tests, the results of the water pressure capability verification will be affected by the instrument being tested, resulting in different results, which ultimately affects the evaluation effect.

[0009] 3. The test instrument has no trigger action. Since the instruments selected by various institutions (laboratories) for proficiency testing are mostly daily test instruments, the purpose of the test is mainly focused on testing their structural support, sealing quality and water absorption rate. It is impossible to implement the trigger action under the predetermined pressure conditions, and the effect of blind sample comparison cannot be achieved. Therefore, the existing water pressure test proficiency verification activities are essentially different from the current mature temperature comparison tests (testing the temperature trigger conditions of blind samples), vibration comparison tests (testing the resonant frequency of blind samples), impact comparison tests (testing the impact trigger conditions of blind samples), etc., and do not yet have the effect of transferring and reproducing the test between different institutions (laboratories).

[0010] 4. The problem of test instruments being unable to be quantitatively traced. Since the instruments selected by various institutions (laboratories) for proficiency testing are mostly routine test instruments, their dimensions, maximum pressure bearing capacity, and operating conditions during the test are all different, making it impossible to achieve the purpose of unified quantitative comparison. At the same time, since most of the instruments being tested will be handed over to customers after the proficiency testing activities are completed, it is impossible to retain samples, resulting in the inability of various institutions (laboratories) to reproduce and trace the same test process. Utility Model Content

[0011] The utility model aims at the lack of existing water pressure comparison test equipment and the insufficiency of test technology, and provides a marine instrument water pressure test comparison equipment, which fundamentally solves the problem that there is no standardized water pressure test comparison equipment in the field of marine instrument environmental adaptability detection in my country, improves the problems of inappropriate comparison form, inconsistent test instruments, no trigger action of test instruments, and inability to quantitatively trace test instruments, and provides a quality monitoring means for marine characteristic water pressure tests. The utility model has the characteristics of simple structure, convenient manufacturing, accurate and rapid testing, and expands the quality monitoring means of various water pressure test institutions (laboratories) in my country.

[0012] The utility model is implemented by the following technical scheme: a marine instrument water pressure test comparison device, including a compared water pressure test system and a water pressure test comparison device;

[0013] The water pressure test comparison device comprises a pressure cabin shell, a sealing end cover 1, a sealing end cover 2, a sealing adapter assembly and a simulated explosion assembly; the sealing end cover 1 is installed at one end interface of the pressure cabin shell, and the sealing end cover 2 is installed at the other end interface, so that the pressure cabin shell and the two sealing end covers are assembled together to form a complete pressure cabin;

[0014] An exhaust hole is provided at the center of the sealing end cover 1, and a sealing blind plug is installed in the exhaust hole to discharge the residual pressure in the pressure cabin after the test; a mounting through hole is provided at the center of the sealing end cover 2, and the sealing adapter assembly is installed on the mounting through hole through a threaded connection on the inner side of the sealing end cover 2, so that the sealing adapter assembly points to the inside of the pressure cabin, and the connection between the sealing adapter assembly and the mounting through hole is sealed; the simulated blasting assembly is installed on the sealing adapter assembly through a threaded connection, and the connection between the simulated blasting assembly and the sealing adapter assembly is sealed; a connecting hole 1 is provided at the center of the sealing adapter assembly, so that the simulated blasting assembly is connected with the outside of the pressure cabin;

[0015] The simulated blasting assembly consists of a mounting base, a high-precision blasting disc and a fragment protection cover. The mounting base is mounted on the sealing adapter assembly through a threaded connection, and the connection between the mounting base and the sealing adapter assembly is sealed; the fragment protection cover is mounted on the mounting base through a threaded connection, and the connection between the fragment protection cover and the mounting base is sealed; the high-precision blasting disc is located between the mounting base and the fragment protection cover, and the damaged surface of the high-precision blasting disc faces the fragment protection cover side; a connecting hole 2 is provided at the center of the mounting base, a connecting hole 3 is provided at the center of the fragment protection cover, and a leakage hole connecting the interior of the pressure cabin and the connecting hole 3 is provided on the fragment protection cover, so that when a predetermined pressure is reached, only the high-precision blasting disc is instantly damaged, causing leakage in the pressure cabin, and ejecting the fragments inward and retaining them in the fragment protection cover;

[0016] The compared water pressure test system includes a pressure test chamber, a pressure-resistant pipeline, a pressure gauge and a booster pump system. The booster pump system is connected to the pressure test chamber through a pressure-resistant pipeline, and a pressure gauge is arranged on the pressure-resistant pipeline. The water pressure test comparison device is placed in the pressure test chamber.

[0017] Furthermore, the sealing end cover 1 is a convex structure, and an end face sealing groove 1 is provided on the radial end face of the sealing end cover 1 at the step, an O-ring 1 is arranged in the end face sealing groove 1, and the O-ring 1 is fitted with an end face of the pressure cabin shell; the sealing end cover 1 is provided with a radial sealing groove 1 on the axial end face of the step, an O-ring 2 is arranged in the radial sealing groove 1, and the O-ring 2 is fitted with an inner side surface of one end of the pressure cabin shell; the end of the pressure cabin shell connected to the sealing end cover 1 is a combination of end face sealing and radial sealing.

[0018] Furthermore, the sealing end cover 2 is a convex structure, and an end face sealing groove 2 is provided on the radial end face of the step, an O-ring 3 is arranged in the end face sealing groove 2, and the O-ring 3 is fitted with the end face of the other end of the pressure cabin shell; the sealing end cover 2 is provided with a radial sealing groove 2 on the axial end face of the step, an O-ring 4 is arranged in the radial sealing groove 2, and the O-ring 4 is fitted with the inner side surface of the other end of the pressure cabin shell; the end of the pressure cabin shell connected to the sealing end cover 2 is a combination of end face sealing and radial sealing.

[0019] Furthermore, the mounting through hole is a stepped structure, the small diameter section of the mounting through hole is close to the outer side of the sealing end cover 2, the large diameter section of the mounting through hole is provided with an internal thread 1, and the sealing adapter assembly is installed on the large diameter section of the mounting through hole through a threaded connection.

[0020] Furthermore, the sealing adapter assembly is a convex structure, the connecting hole one is a stepped structure, the outer surface of the small head of the sealing adapter assembly is provided with an external thread one, the small head of the sealing adapter assembly is connected to the sealing end cover two, the large head of the sealing adapter assembly corresponds to the large diameter section of the connecting hole one, the large diameter section of the connecting hole one is provided with an internal thread two, and the simulated blasting assembly is installed on the large diameter section of the connecting hole one through a threaded connection.

[0021] Furthermore, the mounting base is a convex structure, the connecting hole 2 is a stepped structure, the outer surface of the small head of the mounting base is provided with an external thread 2, the small head of the mounting base is connected to the sealing adapter assembly, the large head of the mounting base corresponds to the large diameter section of the connecting hole 2, the large diameter section of the connecting hole 2 is provided with an internal thread 3, the outer surface of the debris guard cover at one end connected to the mounting base is provided with an external thread 3 that cooperates with the internal thread 3, and the debris guard cover is installed on the large diameter section of the connecting hole 2 through a threaded connection.

[0022] Furthermore, the radial end surface of the second communicating hole at the step is a smooth sealing surface, and the high-precision bursting disc is located on the radial end surface of the second communicating hole at the step.

[0023] Furthermore, the leakage holes are arranged on the side surface of the fragment protection cover and the end surface away from the high-precision bursting disc, and the size of the leakage holes is 1 mm to 3 mm.

[0024] Furthermore, the effective volume ratio of the pressure test chamber and the water pressure test comparison device is less than 400:1.

[0025] The advantages and positive effects of the utility model are:

[0026] 1. The utility model adopts the traditional mechanical structure design concept, and is mainly composed of a pressure cabin shell, a sealing end cover, a sealing adapter assembly and a simulated blasting assembly. All parts are standardized parts, which solves the problems of inappropriate comparison form, inconsistent test instruments, no trigger action of test instruments and inability to quantitatively trace test instruments in traditional water pressure comparison capability verification activities.

[0027] 2. Simple structure and easy to transfer. The components of this utility model are mainly industrial-grade metal parts. They are quick and easy to assemble when used, easy to carry by the organizer of the comparison test, and can be transferred between reference laboratories in the form of standard unified blind samples, realizing the standardized application of water pressure test comparison devices, and the test results of various institutions (laboratories) can be compared and analyzed horizontally.

[0028] 3. High reliability of the device. The components of the utility model are mainly made of titanium alloy and stainless steel, and the main structure is sealed with a rubber O-ring, so that the comparison device is less affected by the external temperature, test medium, pressure increase and decrease rate and assembly process, and the test consistency is strong and the reliability is high.

[0029] 4. Strong compatibility in applicable space. The pressure chamber shell of the hydraulic pressure test comparison device included in the utility model can choose effective inner spaces of different sizes, and can be used by directly assembling the simulated blasting components during the test. This can flexibly meet the requirement that the effective inner space of the pressure test chamber of the hydraulic pressure test system to be compared and the hydraulic pressure test comparison device is less than 400:1, so that the hydraulic pressure test comparison device designed by the utility model basically meets the comparison space requirements of various domestic institutions (laboratories).

[0030] 5. Flexible and accurate blasting pressure. The simulated blasting component has a simple and reliable structure, and the high-precision blasting discs included can be selected from different pressure levels between 1MPa and 100MPa, so as to meet the comparison pressure requirements of various domestic institutions (laboratories); the high-precision blasting discs used are mature industrial-grade blasting discs with stable quality and small discrete blasting data, and the water pressure comparison test process can be reproduced as required.

[0031] 6. The leakage rate is controllable. The fragment protection cover included in the simulated blasting component is equipped with leakage holes of various specifications and sizes. When the predetermined blasting pressure is reached, the high-precision blasting disc is damaged and ejected inward, and the liquid flows into the water pressure test comparison device through the leakage hole. The higher the blasting pressure during the test, the smaller the leakage hole selected. In this way, the leakage rate can be controlled through the leakage hole, and the safety factor can be improved, reducing the instantaneous pressure impact of the simulated leakage on the water pressure test comparison device and the compared water pressure test system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the specific implementation methods of the present utility model, the following is a brief introduction to the drawings required for use in the description of the specific implementation methods. Obviously, the drawings described below are some specific implementation methods of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 A schematic diagram of the structure of a marine instrument water pressure test comparison device provided by an embodiment of the utility model;

[0034] Figure 2 A schematic diagram of the structure of a water pressure test comparison device provided by an embodiment of the utility model;

[0035] Figure 3 A schematic diagram of an exploded view of a simulated blasting assembly provided in an embodiment of the utility model.

[0036] Description of reference numerals:

[0037] 1. Pressure test chamber; 2. Pressure-resistant pipeline; 3. Pressure gauge; 4. Booster pump system; 5. Water pressure test comparison device; 5-1. Pressure chamber shell; 5-2. Sealing end cover one; 5-2-1. Exhaust hole; 5-2-2. Sealing blind plug; 5-3. Sealing end cover two; 5-3-1. Mounting through hole; 5-4. Sealing adapter assembly; 5-4-1. Connecting hole one; 5-5. Simulated blasting assembly; 5-5-1. Mounting base; 5-5-1-1. Connecting hole two; 5-5-2. High-precision blasting disc; 5-5-3. Fragment protection cover; 5-5-3-1. Connecting hole three. DETAILED DESCRIPTION

[0038] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "two", and "three" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] See also Figure 1 to Figure 3 This embodiment provides a marine instrument water pressure test comparison device, including a compared water pressure test system and a water pressure test comparison device 5.

[0042] like Figure 1 As shown, the water pressure test system to be compared is the basic equipment required to carry out the water pressure comparison test, including a pressure test chamber 1, a pressure-resistant pipeline 2, a pressure gauge 3 and a booster pump system 4. The booster pump system 4 is connected to the pressure test chamber 1 through the pressure-resistant pipeline 2, and the pressure gauge 3 is arranged on the pressure-resistant pipeline 2; the water pressure test comparison device 5 is placed in the pressure test chamber 1.

[0043] like Figure 2 As shown, the water pressure test comparison device 5 includes a pressure cabin shell 5-1, a sealing end cover 1 5-2, a sealing end cover 2 5-3, a sealing adapter assembly 5-4 and a simulated blasting assembly 5-5; the pressure cabin shell 5-1, the sealing end cover 1 5-2, the sealing end cover 2 5-3, the sealing adapter assembly 5-4 and the simulated blasting assembly 5-5 are all detachable and can be freely assembled according to the comparison test requirements.

[0044] The pressure cabin shell 5-1 is provided with a sealing end cover 1 5-2 at one end interface and a sealing end cover 2 5-3 at the other end interface, so that the pressure cabin shell 5-1 and the two sealing end covers are assembled together to form a complete pressure cabin during operation.

[0045] An exhaust hole 5-2-1 is provided at the center of the sealing end cover 1 5-2, and a detachable sealing blind plug 5-2-2 is installed in the exhaust hole 5-2-1 for removing the residual pressure in the pressure cabin after the test; a mounting through hole 5-3-1 is provided at the center of the sealing end cover 2 5-3, and the sealing adapter assembly 5-4 is installed on the mounting through hole 5-3-1 on the inner side of the sealing end cover 2 5-3 through a threaded connection, so that the sealing adapter assembly 5-4 points to the inside of the pressure cabin, and the connection between the sealing adapter assembly 5-4 and the mounting through hole 5-3-1 is sealed; the simulated blasting assembly 5-5 is installed on the sealing adapter assembly 5-4 through a threaded connection, and the connection between the simulated blasting assembly 5-5 and the sealing adapter assembly 5-4 is sealed, and the simulated blasting assembly 5-5 and the sealing end cover 2 5-3 are integrated through the sealing adapter assembly 5-4; a connecting hole 1 5-4-1 is provided at the center of the sealing adapter assembly 5-4, so that the simulated blasting assembly 5-5 is connected with the outside of the pressure cabin.

[0046] During assembly, the sealing adapter assembly 5-4 is first connected to the inner side of the sealing end cover 2 5-3 through the threaded connection structure, and then the simulated explosion assembly 5-5 is connected to the sealing adapter assembly 5-4. Each connection is sealed so that when there is external pressure, each connection will not leak liquid into the pressure cabin.

[0047] One function of using the sealing adapter assembly 5-4 is to protect the sealing end cap 2 5-3 and the simulated blasting assembly 5-5. When the mechanical connection is aged and damaged, the sealing adapter assembly 5-4 can be replaced at a lower cost and more convenient to process. Another function is that when different sizes of simulated blasting assemblies 5-5 are selected, there is no need to replace the sealing end cap 2 5-3. Only a suitable sealing adapter assembly 5-4 needs to be processed and replaced to achieve connection, which is more convenient and quick.

[0048] like Figure 3As shown, the simulated blasting assembly 5-5 is composed of a mounting base 5-5-1, a high-precision blasting disc 5-5-2 and a fragmentation shield 5-5-3. The mounting base 5-5-1 is mounted on the sealing adapter assembly 5-4 through a threaded connection, and the connection between the mounting base 5-5-1 and the sealing adapter assembly 5-4 is sealed; the fragmentation shield 5-5-3 is mounted on the mounting base 5-5-1 through a threaded connection, and the connection between the fragmentation shield 5-5-3 and the mounting base 5-5-1 is sealed; the high-precision blasting disc 5-5-2 is located between the mounting base 5-5-1 and the fragmentation shield 5-5-3, and the high-precision The damaged surface of the high-precision bursting disc 5-5-2 faces the side of the fragment protection cover 5-5-3; a connecting hole 2-5-1-1 is provided in the center of the mounting base 5-5-1, so that the high-precision bursting disc 5-5-2 is connected with the outside of the pressure cabin, and a connecting hole 3-5-3-1 is provided in the center of the fragment protection cover 5-5-3. A leakage hole connecting the inside of the pressure cabin and the connecting hole 3-5-3-1 is provided on the fragment protection cover 5-5-3, so that when the predetermined pressure is reached, only the high-precision bursting disc 5-5-2 is damaged instantly, causing leakage of the pressure cabin and ejecting the fragments inwards to be retained in the fragment protection cover 5-5-3.

[0049] In the water pressure test comparison device 5, except for the high-precision bursting disc 5-5-2, the maximum pressure-bearing capacity of the remaining components is more than 1.2 times the maximum pressure-bearing capacity of the compared water pressure test system.

[0050] When the predetermined test pressure is reached, the high-precision bursting disc 5-5-2 is caused to rupture into the interior of the pressure chamber, thereby simulating leakage of the pressure chamber, thereby causing pressure fluctuations in the entire compared water pressure test system.

[0051] When the high-precision bursting disc 5-5-2 is damaged, other parts will not be damaged. When designing the overall structure, safety margins are reserved for all matching parts. Except for the high-precision bursting disc 5-5-2 (the actual thickness is between 0.5mm and 1mm), the maximum pressure resistance of other parts is more than 1.2 times the maximum pressure of the compared water pressure test system, and when the high-precision bursting disc 5-5-2 is damaged, it only breaks inward, and all the fragments enter the fragment protection cover 5-5-3, and will not come into direct contact with other parts.

[0052] During installation, the high-precision bursting disc 5-5-2 is placed between the mounting base 5-5-1 and the fragment protection cover 5-5-3, and the fragment protection cover 5-5-3 and the mounting base 5-5-1 are connected together through threads. During the process of tightening the threads, the three are directly in contact through extrusion, thereby achieving a sealing effect. In terms of internal structure, the center of the mounting base 5-5-1 is a through hole, the center of the high-precision bursting disc 5-5-2 is a through hole after being damaged, the center of the fragment protection cover 5-5-3 is a through hole, and there are leakage holes on the fragment protection cover 5-5-3 that are connected to the inside of the pressure cabin, which are connected in sequence to form a channel. When the high-precision bursting disc 5-5-2 is not broken, the channel is in a sealed state and will not cause leakage; when the high-precision bursting disc 5-5-2 is broken, the channel forms a leakage path, causing external pressure to leak into the pressure cabin shell 5-1.

[0053] As a preferred embodiment, the sealing end cover 5-2 is a convex structure, and the sealing end cover 5-2 is provided with an end face sealing groove 1 on the radial end face at the step, and an O-ring 1 is arranged in the end face sealing groove 1, and the O-ring 1 is fitted with the end face of one end of the pressure cabin shell 5-1; the sealing end cover 5-2 is provided with a radial sealing groove 1 on the axial end face at the step, and an O-ring 2 is arranged in the radial sealing groove 1, and the O-ring 2 is fitted with the inner side surface of one end of the pressure cabin shell 5-1; the end where the pressure cabin shell 5-1 is connected to the sealing end cover 5-2 is a combination of end face sealing and radial sealing.

[0054] As a preferred embodiment, the sealing end cover 2 5-3 is a convex structure, and the sealing end cover 2 5-3 is provided with an end face sealing groove 2 on the radial end face at the step, and an O-ring 3 is arranged in the end face sealing groove 2, and the O-ring 3 is fitted with the other end face of the pressure cabin shell 5-1; the sealing end cover 2 5-3 is provided with a radial sealing groove 2 on the axial end face at the step, and an O-ring 4 is arranged in the radial sealing groove 2, and the O-ring 4 is fitted with the inner side surface of the other end of the pressure cabin shell 5-1; the end of the pressure cabin shell 5-1 connected to the sealing end cover 2 5-3 is a combination of end face sealing and radial sealing.

[0055] When sealing, the sealing end cap 1 5-2 and the sealing end cap 2 5-3 are set with O-rings and then inserted into the pressure cabin shell 5-1, and the bolts are installed to make the sealing end cap 1 5-2 and the sealing end cap 2 5-3 fit with the pressure cabin shell 5-1, squeeze the O-rings, and the O-rings fill the sealing grooves to play a sealing role. In the field of sealing, any of the above sealing methods can be generally used, but considering that the pressure of this comparison device is relatively high, and in order to avoid poor cooperation between the pressure cabin shell 5-1 and the sealing end caps during the simulation of leakage, leakage occurs and interference occurs, so two sealing methods are used at the same time for double insurance.

[0056] As a preferred embodiment, the mounting through hole 5-3-1 is a stepped structure, the small diameter section of the mounting through hole 5-3-1 is close to the outer side of the sealing end cover 2 5-3, the large diameter section of the mounting through hole 5-3-1 is provided with an internal thread 1, and the radial end surface of the mounting through hole 5-3-1 at the step is a smooth sealing surface, and the sealing adapter assembly 5-4 is installed on the large diameter section of the mounting through hole 5-3-1 of the sealing end cover 2 5-3 through a threaded connection.

[0057] The radial end face of the mounting through hole 5-3-1 of the sealing end cover 2 5-3 at the step is made into a smooth sealing surface, and its processing flatness is ensured to meet the sealing requirements, so that when the sealing adapter assembly 5-4 and the simulated blasting assembly 5-5 are successively installed on the inner side of the sealing end cover 2 5-3, the three are tightly matched, and when there is external pressure, the joints will not leak liquid into the pressure cabin.

[0058] As a preferred embodiment, the sealing adapter component 5-4 is a convex structure, the connecting hole 5-4-1 is a stepped structure, the outer surface of the small head of the sealing adapter component 5-4 is provided with an external thread 1 that matches the internal thread 1, the small head of the sealing adapter component 5-4 is connected to the large diameter section of the mounting through hole 5-3-1 of the sealing end cover 2 5-3, the large head of the sealing adapter component 5-4 corresponds to the large diameter section of the connecting hole 5-4-1, the large diameter section of the connecting hole 5-4-1 is provided with an internal thread 2, and the simulated blasting component 5-5 is installed on the large diameter section of the connecting hole 5-4-1 of the sealing adapter component 5-4 through a threaded connection.

[0059] Through the threaded connection structure, the small head of the sealing adapter component 5-4 is connected to the sealing end cover 5-3 to achieve a sealing effect; at the same time, the simulated blasting component 5-5 is connected to the large head of the sealing adapter component 5-4 to achieve a sealing effect.

[0060] As a preferred embodiment, the mounting base 5-5-1 is a convex structure, the connecting hole 5-5-1-1 is a stepped structure, the outer surface of the small head of the mounting base 5-5-1 is provided with an external thread 2 that matches the internal thread 2, the small head of the mounting base 5-5-1 is connected to the large diameter section of the connecting hole 1 5-4-1 of the sealing adapter assembly 5-4, the large head of the mounting base 5-5-1 corresponds to the large diameter section of the connecting hole 2 5-5-1-1, the large diameter section of the connecting hole 2 5-5-1-1 is provided with an internal thread 3, the debris shield 5-5-3 is provided with an external thread 3 that matches the internal thread 3 on the outer surface of the end connected to the mounting base 5-5-1, and the debris shield 5-5-3 is installed on the large diameter section of the connecting hole 2 5-5-1-1 of the mounting base 5-5-1 through a threaded connection.

[0061] The radial end surface of the second connecting hole 5-5-1-1 at the step is a smooth sealing surface, and the high-precision bursting disc 5-5-2 is located on the radial end surface of the second connecting hole 5-5-1-1 at the step. The high-precision bursting disc 5-5-2 can be selected from components with different pressure levels from 1MPa to 100MPa to simulate the leakage of the water pressure test comparison device 5 under different pressure conditions, so as to achieve the function of free adjustment of the comparison test pressure.

[0062] As a preferred embodiment, the leakage holes are arranged on the side surface of the fragment protection cover 5-5-3 and the end surface away from the high-precision bursting piece 5-5-2, and the size of the leakage holes is 1mm to 3mm.

[0063] The fragment protection cover 5-5-3 has the same external dimensions and is made into various specifications according to the different sizes of the leakage holes thereon, so as to control the leakage rate of the high-precision bursting disc 5-5-2 after it is damaged. It is generally recommended that the higher the comparison test pressure value, the smaller the leakage hole specification of the fragment protection cover 5-5-3 should be selected, and vice versa. The main purpose is to make the leakage obvious and facilitate the observation of the pressure change caused by the simulated leakage. In the preferred embodiment, the diameter of the leakage hole is divided into 1mm, 2mm, and 3mm specifications.

[0064] During operation, the small head of the mounting base 5-5-1 is used to connect with the sealing adapter assembly 5-4 and achieve a sealing effect; the radial end face of the connecting hole 2 5-5-1-1 of the mounting base 5-5-1 at the step is a smooth sealing surface, which is used to support the high-precision bursting disc 5-5-2, so that the high-precision bursting disc 5-5-2 can be clamped in the center by the fragment protection cover 5-5-3 and play a sealing role. The high-precision bursting disc 5-5-2 is made of metal, and the center can be destroyed under different pressure conditions according to design requirements. During installation, the damaged surface of the high-precision bursting disc 5-5-2 is facing the side of the fragment protection cover 5-5-3, so that when the predetermined pressure is reached, it will be instantly damaged, causing pressure leakage, and the fragments will be ejected inward and retained in the fragment protection cover 5-5-3 to avoid clogging the through holes on the sealing adapter assembly 5-4 and the sealing end cover 2 5-3. The fragment protection cover 5-5-3 is used to receive the damaged high-precision bursting disc 5-5-2. At the same time, leakage holes of different sizes can be set on the side of the fragment protection cover 5-5-3 and the end face away from the high-precision bursting disc 5-5-2, so as to meet the leakage requirements under different pressure conditions and make the leakage effect more obvious. Generally speaking, the higher the comparison test pressure, the smaller the leakage hole; the lower the comparison test pressure, the larger the leakage hole. The reason is that the greater the pressure difference, the smaller the required leakage hole; the smaller the pressure difference, the larger the required leakage hole.

[0065] As a preferred embodiment, the effective content volume ratio of the pressure test chamber 1 and the water pressure test comparison device 5 is less than 400: 1. If the volume ratio is too large, the pressure drop effect caused by the simulated explosion will not be obvious and difficult to observe in time.

[0066] The maximum pressure of the pressure test chamber 1 of the utility model is 100MPa, the effective internal space is Φ0.5m×1.6m, and the control accuracy of the pressure gauge 3 is 0.4%FS. The compared water pressure test systems of other domestic water pressure test institutions (laboratories) have different maximum pressure, effective internal space of the test chamber and control accuracy of the pressure gauge 3, but it does not affect the normal implementation of the water pressure comparison test.

[0067] The maximum pressure resistance of the water pressure test comparison device 5 is 127MPa, and the effective internal volume is optional for 1L and 3L, which can cover the comparison test pressure range and space requirements of major domestic water pressure test institutions (laboratories). Before the test, it is necessary to select a suitable pressure chamber shell 5-1 based on the effective internal space of the pressure test chamber 1 of the compared water pressure test system. It is generally recommended that the effective internal volume ratio of the two be less than 400:1, otherwise the effect of the pressure fluctuation caused by the simulated leakage will be reduced.

[0068] The effective internal volume of the pressure chamber shell 5-1 can be optimized according to the effective internal space of the pressure test chamber 1 of the compared water pressure test system, and the water pressure test comparison device 5 can be processed into standard devices with various specifications of internal volume. The sealing blind plug 5-2-2, the sealing adapter assembly 5-4 and the simulated explosion assembly 5-5 do not need to be changed, and can be directly assembled on the sealing end cover 1 5-2 and the sealing end cover 2 5-3 of the new specifications for use.

[0069] The comparison test method of the marine instrument water pressure test is as follows:

[0070] Take fresh water as the test medium, select 15℃~35℃ as the environmental condition of the water pressure comparison test, and control the temperature difference between the test medium of the compared water pressure test system and the water pressure test comparison device 5 within ±5℃;

[0071] The specifications of the pressure chamber shell 5-1 and two sealing end covers of the hydraulic pressure test comparison device 5 are selected according to the effective internal volume of the pressure test chamber 1 of the hydraulic pressure test system to be compared, so that the effective internal volume ratio of the pressure test chamber 1 and the hydraulic pressure test comparison device 5 is less than 400:1;

[0072] Based on the pressure range of the compared water pressure test system, the test organizer selects a high-precision bursting disc 5-5-2 with a suitable pressure value and a fragment protection cover 5-5-3 with a suitable leakage hole specification in the simulated bursting component 5-5, so that the bursting pressure value of the high-precision bursting disc 5-5-2 is less than the highest pressure value of the compared water pressure test system, and the leakage rate is relatively obvious; the definition of relatively obvious is based on previous test results. Generally, when the pressure reduction rate is about 2MPa / min, there will be obvious observable effect in the pressure control curve or on the pressure gauge 3.

[0073] The test organizer assembles the water pressure test comparison device 5 with the selected accessories and confirms that it is well sealed as a blind comparison sample; then the blind comparison sample is handed over to the participants of the water pressure comparison test;

[0074] The participants of the water pressure comparison test will pressurize the water pressure test system to its maximum pressure without load and maintain it for 10 minutes, and then reduce the pressure to zero to ensure that its sealing and pressure-maintaining effects are good;

[0075] Place the assembled hydraulic pressure test comparison device 5 into the pressure test chamber 1 of the hydraulic pressure test system to be compared, and then use automatic or manual control to increase the pressure of the hydraulic pressure test system to be compared at a pressure increase rate not exceeding 2MPa / min; during the pressure increase, turn on the pressure recording function of the hydraulic pressure test system to be compared, and observe the real-time changes of the pressure gauge 3;

[0076] When the pressure in the pressure test chamber 1 reaches the bursting pressure of the high-precision bursting disc 5-5-2 in the water pressure test comparison device 5, it automatically breaks and issues a sound warning, that is, when the water pressure test comparison device 5 triggers the simulated leakage action, the simulated leakage of the water pressure test comparison device 5 is realized, causing pressure fluctuations in the compared water pressure test system; the triggering pressure value at this time is recorded, and the pressure curve of the water pressure comparison test process is retained; when the pressure gauge 3 or the pressure curve is observed to have a significant pressure drop, the pressurization of the compared water pressure test system is stopped, and the entire simulated leakage test is ended;

[0077] After the test is completed, the pressure of the compared water pressure test system is relieved by automatic or manual control at a pressure reduction rate not exceeding 20 MPa / min, and the water pressure test comparison device 5 is taken out after the pressure returns to zero;

[0078] Remove the sealing blind plug 5-2-2 on the sealing end cover 5-2, empty the internal residual pressure through the exhaust hole 5-2-1, and then take out the simulated explosion component 5-5 to confirm whether it is damaged.

[0079] The high-precision bursting disc 5-5-2 is selected by the test organizer before the test and installed in the water pressure test comparison device 5. At this time, the test organizer knows the specific bursting value, but the test participants do not know it. The test participants can only know the bursting pressure value through the test.

[0080] When leaking, the pressure of the compared water pressure test system will enter the pressure cabin shell 5-1 of the water pressure test comparison device 5, and the two will reach a synchronous pressure change. When the pressure of the compared water pressure test system is relieved to 0, theoretically, the pressure in the pressure cabin shell 5-1 of the water pressure test comparison device 5 will also be reduced to 0, but because the leakage hole of the debris protection cover 5-5-3 is 1mm~3mm, the pressure relief will have a lag. In order to ensure that there is no residual pressure in the pressure cabin shell 5-1 of the water pressure test comparison device 5 before disassembly and inspection, and to improve safety, it is necessary to confirm the pressure relief through the exhaust hole 5-2-1. At the same time, because the diameter of the exhaust hole 5-2-1 is larger than the leakage hole of the debris protection cover 5-5-3, the liquid in the pressure cabin shell 5-1 of the water pressure test comparison device 5 can be discharged more conveniently, which is convenient for subsequent disassembly and inspection.

[0081] The recorded simulated leakage trigger pressure value, water pressure comparison test process data, water pressure comparison test process pressure curve and other relevant information are compiled into the comparison report to form a water pressure comparison certificate.

[0082] In this embodiment, the water pressure test comparison device 5 covers a range of up to 127MPa, and the effective content volume is optional for 1L and 3L. The high-precision bursting piece 5-5-2 has a test range of 1MPa to 100MPa. It can perform water pressure comparison tests on the pressure test chamber 1 with a maximum pressure of 100MPa and an effective content volume of less than 1200L of various domestic water pressure testing institutions (laboratories).

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A marine instrument water pressure test comparison device, characterized in that: It includes the compared hydraulic pressure test system and the hydraulic pressure test comparison device; The water pressure test comparison device comprises a pressure cabin shell, a sealing end cover 1, a sealing end cover 2, a sealing adapter assembly and a simulated explosion assembly; the sealing end cover 1 is installed at one end interface of the pressure cabin shell, and the sealing end cover 2 is installed at the other end interface, so that the pressure cabin shell and the two sealing end covers are assembled together to form a complete pressure cabin; An exhaust hole is provided at the center of the sealing end cover 1, and a sealing blind plug is installed in the exhaust hole to discharge the residual pressure in the pressure cabin after the test; a mounting through hole is provided at the center of the sealing end cover 2, and the sealing adapter assembly is installed on the mounting through hole through a threaded connection on the inner side of the sealing end cover 2, so that the sealing adapter assembly points to the inside of the pressure cabin, and the connection between the sealing adapter assembly and the mounting through hole is sealed; the simulated blasting assembly is installed on the sealing adapter assembly through a threaded connection, and the connection between the simulated blasting assembly and the sealing adapter assembly is sealed; a connecting hole 1 is provided at the center of the sealing adapter assembly, so that the simulated blasting assembly is connected with the outside of the pressure cabin; The simulated blasting assembly consists of a mounting base, a high-precision blasting disc and a fragment protection cover. The mounting base is mounted on the sealing adapter assembly through a threaded connection, and the connection between the mounting base and the sealing adapter assembly is sealed; the fragment protection cover is mounted on the mounting base through a threaded connection, and the connection between the fragment protection cover and the mounting base is sealed; the high-precision blasting disc is located between the mounting base and the fragment protection cover, and the damaged surface of the high-precision blasting disc faces the fragment protection cover side; a connecting hole 2 is provided at the center of the mounting base, a connecting hole 3 is provided at the center of the fragment protection cover, and a leakage hole connecting the interior of the pressure cabin and the connecting hole 3 is provided on the fragment protection cover, so that when a predetermined pressure is reached, only the high-precision blasting disc is instantly damaged, causing leakage in the pressure cabin, and ejecting the fragments inward and retaining them in the fragment protection cover; The compared water pressure test system includes a pressure test chamber, a pressure-resistant pipeline, a pressure gauge and a booster pump system. The booster pump system is connected to the pressure test chamber through a pressure-resistant pipeline, and a pressure gauge is arranged on the pressure-resistant pipeline. The water pressure test comparison device is placed in the pressure test chamber.

2. The marine instrument water pressure test comparison equipment according to claim 1 is characterized in that: The sealing end cover 1 is a convex structure, and an end face sealing groove 1 is provided on the radial end face of the step, an O-ring 1 is arranged in the end face sealing groove 1, and the O-ring 1 is fitted with the end face of one end of the pressure cabin shell; the sealing end cover 1 is provided with a radial sealing groove 1 on the axial end face of the step, an O-ring 2 is arranged in the radial sealing groove 1, and the O-ring 2 is fitted with the inner side surface of one end of the pressure cabin shell; the end of the pressure cabin shell connected to the sealing end cover 1 is a combination of end face sealing and radial sealing.

3. The marine instrument water pressure test comparison equipment according to claim 1 is characterized in that: The sealing end cover 2 is a convex structure, and an end face sealing groove 2 is provided on the radial end face at the step of the sealing end cover 2, and an O-ring 3 is arranged in the end face sealing groove 2, and the O-ring 3 is fitted with the end face of the other end of the pressure cabin shell; the sealing end cover 2 is provided with a radial sealing groove 2 on the axial end face at the step, and an O-ring 4 is arranged in the radial sealing groove 2, and the O-ring 4 is fitted with the inner side surface of the other end of the pressure cabin shell; the end of the pressure cabin shell connected to the sealing end cover 2 is a combination of end face sealing and radial sealing.

4. The marine instrument water pressure test comparison equipment according to claim 1, characterized in that: The mounting through hole is a stepped structure, the small diameter section of the mounting through hole is close to the outer side of the sealing end cover 2, the large diameter section of the mounting through hole is provided with an internal thread 1, and the sealing adapter assembly is mounted on the large diameter section of the mounting through hole by threaded connection.

5. The marine instrument water pressure test comparison equipment according to claim 1, characterized in that: The sealing adapter assembly is a convex structure, the connecting hole one is a stepped structure, the outer surface of the small head of the sealing adapter assembly is provided with an external thread one, the small head of the sealing adapter assembly is connected to the sealing end cover two, the large head of the sealing adapter assembly corresponds to the large diameter section of the connecting hole one, the large diameter section of the connecting hole one is provided with an internal thread two, and the simulated blasting assembly is installed on the large diameter section of the connecting hole one through a threaded connection.

6. The marine instrument water pressure test comparison equipment according to claim 1, characterized in that: The mounting base is a convex structure, the connecting hole 2 is a stepped structure, the outer surface of the small head of the mounting base is provided with an external thread 2, the small head of the mounting base is connected to the sealing adapter assembly, the large head of the mounting base corresponds to the large diameter section of the connecting hole 2, the large diameter section of the connecting hole 2 is provided with an internal thread 3, the outer surface of the debris guard connected to the mounting base at one end is provided with an external thread 3 matching the internal thread 3, and the debris guard is installed on the large diameter section of the connecting hole 2 through a threaded connection.

7. The marine instrument water pressure test comparison equipment according to claim 6 is characterized in that: The radial end surface of the second communicating hole at the step is a smooth sealing surface, and the high-precision bursting disc is located on the radial end surface of the second communicating hole at the step.

8. The marine instrument water pressure test comparison equipment according to claim 1, characterized in that: The leakage holes are arranged on the side surface of the fragment protection cover and the end surface away from the high-precision bursting disc, and the size of the leakage holes is 1mm to 3mm.

9. The marine instrument water pressure test comparison equipment according to claim 1, characterized in that: The effective volume ratio of the pressure test chamber and the water pressure test comparison device is less than 400:1.

Images