A test device and test method for an underwater gas storage structure

Abstract

The application provides a test device and a test method of an underwater gas storage structure, and belongs to the technical field of underwater compressed air energy storage, wherein the test device of the underwater gas storage structure comprises a low-pressure water storage structure, a high-pressure water storage structure, a gas conveying structure, a low-pressure pressure regulating assembly and a high-pressure pressure regulating assembly; the low-pressure water storage structure is internally adapted to accommodate a low-pressure test gas storage structure; the high-pressure water storage structure is internally adapted to accommodate a high-pressure test gas storage structure; the gas conveying structure is in communication with the low-pressure water storage structure and the high-pressure water storage structure through a gas conveying assembly and is adapted to be in communication with the low-pressure test gas storage structure and the high-pressure test gas storage structure through a gas charging assembly; the low-pressure pressure regulating assembly is in communication with the low-pressure water storage structure; and the high-pressure pressure regulating assembly is in communication with the high-pressure water storage structure. The test device of the underwater gas storage structure provided by the application can perform low-pressure test and high-pressure test, the test mode is easy to implement, and cost is saved.

Description

Technical Field

[0001] This invention relates to the field of underwater compressed air energy storage technology, specifically to a test device and test method for an underwater air storage structure. Background Technology

[0002] Underwater compressed air energy storage, as an isobaric compressed air energy storage technology, differs from conventional compressed air energy storage, which uses underground caves or rigid storage tanks on the ground to store air. Underwater compressed air energy storage places the storage structure underwater and uses the static pressure characteristics of water to achieve isobaric storage and release of compressed air. It has advantages such as high efficiency and flexible and variable energy storage scale, providing a new approach and feasible technical solution for the large-scale and smooth output of marine renewable energy.

[0003] As a key component of isobaric compressed air energy storage systems, the establishment of a material property database for gas storage structures, the study of their structural and thermodynamic characteristics, and the elucidation of their fatigue failure mechanisms are crucial for their design and fabrication. Since underwater gas storage typically requires the structures to be installed at depths exceeding 500 meters, testing of these structures necessitates both low-pressure and high-pressure tests. However, current testing equipment for high-pressure gas storage structure characterization is costly and difficult to implement. Summary of the Invention

[0004] Therefore, the present invention aims to overcome the shortcomings of existing experimental devices for studying the characteristics of high-pressure gas storage structures, which are costly and difficult to implement, and thus provides an experimental device and method for underwater gas storage structures.

[0005] To address the aforementioned problems, the present invention provides a test apparatus for an underwater gas storage structure, comprising: a low-pressure water storage structure, internally adapted to accommodate a low-pressure test gas storage structure; a high-pressure water storage structure, internally adapted to accommodate a high-pressure test gas storage structure; a gas transmission structure, connected to the low-pressure water storage structure and the high-pressure water storage structure via a gas transmission component, and adapted to be connected to the low-pressure test gas storage structure and the high-pressure test gas storage structure via an inflation component; a low-pressure regulating component, connected to the low-pressure water storage structure; and a high-pressure regulating component, connected to the high-pressure water storage structure.

[0006] Optionally, the gas supply assembly includes a gas supply pipeline and a gas supply valve group, wherein the gas supply valve group is disposed on the gas supply pipeline; the inflation assembly includes an inflation pipeline and an inflation valve group, wherein the inflation valve group is disposed on the inflation pipeline.

[0007] Optionally, the gas transmission pipeline includes a main gas transmission line, a low-pressure gas transmission branch line, and a high-pressure gas transmission branch line. The main gas transmission line is connected downstream of the gas transmission structure. The low-pressure gas transmission branch line and the high-pressure gas transmission branch line are connected in parallel downstream of the main gas transmission line. The low-pressure gas transmission branch line is connected to the low-pressure water storage structure, and the high-pressure gas transmission branch line is connected to the high-pressure water storage structure. The gas transmission valve assembly includes a first valve body located on the main gas transmission line, a second valve body located on the low-pressure gas transmission branch line, and a third valve body located on the high-pressure gas transmission branch line. The inflation pipeline includes an inflation main line, a low-pressure inflation branch line, and a high-pressure inflation branch line. The inflation main line is connected and disposed downstream of the gas transmission structure. The low-pressure inflation branch line and the high-pressure inflation branch line are connected in parallel downstream of the inflation main line. The low-pressure inflation branch line is adapted to connect to the low-pressure test gas storage structure, and the high-pressure inflation branch line is adapted to connect to the high-pressure test gas storage structure. The inflation valve group includes a fourth valve body disposed on the inflation main line, a fifth valve body disposed on the low-pressure inflation branch line, and a sixth valve body disposed on the high-pressure inflation branch line.

[0008] Optionally, the low-pressure inflation branch is connected to a low-pressure inflation pressure detection unit and / or a low-pressure inflation temperature detection unit; the high-pressure inflation branch is connected to a high-pressure inflation pressure detection unit and / or a high-pressure inflation temperature detection unit; and a flow detection unit is provided on the inflation main line.

[0009] Optionally, the test apparatus for the underwater gas storage structure further includes a low-pressure venting component and a high-pressure venting component. The low-pressure venting component is adapted to be connected in communication with the low-pressure test gas storage structure, and the high-pressure venting component is adapted to be connected in communication with the high-pressure test gas storage structure.

[0010] Optionally, the low-pressure water storage structure is connected to a low-pressure detection unit and / or a low-pressure temperature detection unit, the low-pressure detection unit being electrically connected to the low-pressure regulating component; the high-pressure water storage structure is connected to a high-pressure detection unit and / or a high-pressure temperature detection unit, the high-pressure detection unit being electrically connected to the high-pressure regulating component.

[0011] Optionally, the test apparatus for the underwater gas storage structure further includes a water supply structure, which is connected to the low-pressure water storage structure and the high-pressure water storage structure via a water supply component; and / or, the low-pressure water storage structure is transparent, and the high-pressure water storage structure is at least partially transparent.

[0012] This invention also provides a testing method for an underwater gas storage structure, applied to the aforementioned testing apparatus for the underwater gas storage structure, comprising: testing a low-pressure test gas storage structure by submerging the low-pressure test gas storage structure with liquid in a low-pressure water storage structure; supplying gas into the low-pressure water storage structure through a gas supply structure and a gas supply component to bring the low-pressure water storage structure to a predetermined low-pressure test pressure; supplying gas into the low-pressure test gas storage structure through a gas supply structure and a gas filling component; and adjusting the low-pressure water storage structure to maintain the predetermined low-pressure test pressure using a low-pressure regulating component; and testing a high-pressure test gas storage structure by submerging the high-pressure test gas storage structure with liquid in a high-pressure water storage structure; supplying gas into the high-pressure water storage structure through a gas supply structure and a gas supply component to bring the high-pressure water storage structure to a predetermined high-pressure test pressure; supplying gas into the high-pressure test gas storage structure through a gas supply structure and a gas filling component; and adjusting the high-pressure water storage structure to maintain the predetermined high-pressure test pressure using a high-pressure regulating component.

[0013] Optionally, during the test of the low-pressure test gas storage structure, after the low-pressure test gas storage structure is filled with gas, the gas is released through the low-pressure venting component connected to the low-pressure test gas storage structure; during the test of the high-pressure test gas storage structure, after the high-pressure test gas storage structure is filled with gas, the gas is released through the high-pressure venting component connected to the high-pressure test gas storage structure.

[0014] Optionally, the low-pressure test gas storage structure is inflated and then deflated, and the test is repeated cyclically; the high-pressure test gas storage structure is inflated and then deflated, and the test is repeated cyclically.

[0015] The present invention has the following advantages:

[0016] 1. This invention provides a testing device for an underwater gas storage structure. It uses a gas supply structure and gas supply components to supply gas to a low-pressure water storage structure, allowing the low-pressure test gas storage structure to withstand a predetermined low-pressure test pressure underwater. Then, the gas supply structure and gas filling components inflate the low-pressure test gas storage structure for testing. Furthermore, a low-pressure regulating component can adjust and maintain the predetermined low-pressure test pressure within the low-pressure water storage structure, ensuring the accuracy of the low-pressure test results. Similarly, it uses a gas supply structure and gas supply components to supply gas to a high-pressure water storage structure, allowing the high-pressure test gas storage structure to withstand a predetermined high-pressure test pressure underwater. Then, the gas supply structure and gas filling components inflate the high-pressure test gas storage structure for testing. Furthermore, a high-pressure regulating component can adjust and maintain the predetermined high-pressure test pressure within the high-pressure water storage structure, ensuring the accuracy of the high-pressure test results. Therefore, the testing device for the underwater gas storage structure of this invention can perform both low-pressure and high-pressure tests, and the testing method is easy to implement and cost-effective.

[0017] 2. The present invention provides a test device for an underwater gas storage structure. By setting a low-pressure venting component, it can test the gas filling and venting characteristics of the low-pressure test gas storage structure and the fatigue failure mechanism of frequent gas filling and venting; by setting a high-pressure venting component, it can test the gas filling and venting characteristics of the high-pressure test gas storage structure and the fatigue failure mechanism of frequent gas filling and venting.

[0018] 3. The present invention provides a test device for an underwater gas storage structure, which makes the low-pressure water storage structure transparent, so that the interior of the low-pressure water storage structure can be visualized, making it convenient for staff to observe the low-pressure test gas storage structure; the high-pressure water storage structure is at least partially transparent, so that the high-pressure test gas storage structure can be observed through the partially transparent part; and it is convenient to compare the high-pressure test and the low-pressure test, so that the laws and phenomena of the high-pressure test can be inferred and verified by the laws and phenomena of the low-pressure test, so as to mutually verify each other. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the overall structure of the test device for the underwater gas storage structure provided in Embodiment 1 of the present invention is shown.

[0021] Explanation of reference numerals in the attached figures:

[0022] 10. Low-pressure water storage structure; 20. High-pressure water storage structure; 30. Gas transmission structure; 31. Compressor; 32. Pressure stabilizing tank; 40. Gas transmission assembly; 41. Gas transmission pipeline; 411. Gas transmission main line; 412. Low-pressure gas transmission branch line; 413. High-pressure gas transmission branch line; 42. Gas transmission valve assembly; 421. First valve body; 422. Second valve body; 423. Third valve body; 50. Gas charging assembly; 51. Gas charging pipeline; 511. Gas charging main line; 5111. Flow detection unit; 512. Low-pressure inflation branch; 5121, Low-pressure inflation pressure detection unit; 5122, Low-pressure inflation temperature detection unit; 5123, Branch; 5124, Seventh valve body; 513, High-pressure inflation branch; 5131, High-pressure inflation pressure detection unit; 5132, High-pressure inflation temperature detection unit; 52, Inflation valve assembly; 521, Fourth valve body; 522, Fifth valve body; 523, Sixth valve body; 60, Low-pressure regulating assembly; 61, Low-pressure regulating pipeline; 62, Tenth valve body; 7 0. High-pressure regulating assembly; 71. High-pressure regulating pipeline; 72. Eleventh valve body; 80. Low-pressure venting assembly; 81. Low-pressure venting pipeline; 82. Eighth valve body; 90. High-pressure venting assembly; 91. High-pressure venting pipeline; 92. Ninth valve body; 100. Low-pressure detection unit; 110. Low-pressure temperature detection unit; 120. High-pressure detection unit; 130. High-pressure temperature detection unit; 140. Water supply structure; 141. Water tank; 142. Water pump; 150. Water components; 151, water supply pipeline; 1511, main water supply line; 1512, low-pressure water supply branch; 1513, high-pressure water supply branch; 152, water supply valve assembly; 1521, twelfth valve body; 1522, thirteenth valve body; 160, drainage assembly; 161, drainage pipeline; 162, fourteenth valve body; 170, tensile testing unit; 180, low-pressure safety valve; 190, high-pressure safety valve; 1000, low-pressure test gas storage structure; 2000, high-pressure test gas storage structure. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Example 1

[0028] like Figure 1 A specific embodiment of the test apparatus for the underwater gas storage structure shown includes: a low-pressure water storage structure 10, a high-pressure water storage structure 20, a gas transmission structure 30, a low-pressure regulating component 60, and a high-pressure regulating component 70. The low-pressure water storage structure 10 is internally adapted to accommodate a low-pressure test gas storage structure 1000, and the high-pressure water storage structure 20 is internally adapted to accommodate a high-pressure test gas storage structure 2000. The gas transmission structure 30 is connected to the low-pressure water storage structure 10 and the high-pressure water storage structure 20 via a gas transmission component 40, and is adapted to be connected to the low-pressure test gas storage structure 1000 and the high-pressure test gas storage structure 2000 via an inflation component 50. The low-pressure regulating component 60 is connected to the low-pressure water storage structure 10, and the high-pressure regulating component 70 is connected to the high-pressure water storage structure 20.

[0029] Air is supplied to the low-pressure water storage structure 10 using the air supply structure 30 and air supply assembly 40, allowing the low-pressure test air storage structure 1000 to withstand a predetermined low-pressure test pressure underwater. Then, air is supplied to the low-pressure test air storage structure 1000 via the air supply structure 30 and air filling assembly 50 for testing. The low-pressure regulating assembly 60 can adjust and maintain the predetermined low-pressure test pressure within the low-pressure water storage structure 10, ensuring the accuracy of the low-pressure test results. Similarly, air is supplied to the high-pressure water storage structure 20 using the air supply structure 30 and air supply assembly 40, allowing the high-pressure test air storage structure 2000 to withstand a predetermined high-pressure test pressure underwater. Then, air is supplied to the high-pressure test air storage structure 2000 via the air supply structure 30 and air filling assembly 50 for testing. The high-pressure regulating assembly 70 can adjust and maintain the predetermined high-pressure test pressure within the high-pressure water storage structure 20, ensuring the accuracy of the high-pressure test results. Therefore, the testing device using the underwater air storage structure of this invention can perform both low-pressure and high-pressure tests, the testing method is easy to implement, and it saves costs.

[0030] It is worth noting that the low-pressure water storage structure 10 is used to simulate a low-pressure environment with shallow water depth, while the high-pressure water storage structure 20 is used to simulate a high-pressure environment with deep water depth.

[0031] In this embodiment, both the low-pressure test gas storage structure 1000 and the high-pressure test gas storage structure 2000 are flexible gas storage structures, such as airbags. Therefore, during inflation, the low-pressure test gas storage structure 1000 and the high-pressure test gas storage structure 2000 expand. At this time, the pressure inside the low-pressure water storage structure 10 and the high-pressure water storage structure 20 increases. In order to maintain the pressure at the predetermined low-pressure test pressure and the predetermined high-pressure test pressure, the low-pressure regulating component 60 and the high-pressure regulating component 70 are used to vent the low-pressure water storage structure 10 and the high-pressure water storage structure 20, thereby achieving the purpose of stabilizing the pressure.

[0032] like Figure 1 As shown, the gas delivery assembly 40 includes a gas delivery pipeline 41 and a gas delivery valve assembly 42, with the gas delivery valve assembly 42 disposed on the gas delivery pipeline 41. Specifically, as... Figure 1 As shown, the gas transmission pipeline 41 includes a main gas transmission pipeline 411, a low-pressure gas transmission branch 412, and a high-pressure gas transmission branch 413. The main gas transmission pipeline 411 is connected downstream of the gas transmission structure 30. The low-pressure gas transmission branch 412 and the high-pressure gas transmission branch 413 are connected in parallel downstream of the main gas transmission pipeline 411. The low-pressure gas transmission branch 412 is connected to the low-pressure water storage structure 10, and the high-pressure gas transmission branch 413 is connected to the high-pressure water storage structure 20. The gas transmission valve group 42 includes a first valve body 421 installed on the main gas transmission pipeline 411, a second valve body 422 installed on the low-pressure gas transmission branch 412, and a third valve body 423 installed on the high-pressure gas transmission branch 413.

[0033] It should be noted that when gas needs to be supplied to the low-pressure water storage structure 10, the first valve body 421 and the second valve body 422 are opened, allowing gas to enter the low-pressure water storage structure 10 through the gas supply main 411 and the low-pressure gas supply branch 412; when gas needs to be supplied to the high-pressure water storage structure 20, the first valve body 421 and the third valve body 423 are opened, allowing gas to enter the high-pressure water storage structure 20 through the gas supply main 411 and the high-pressure gas supply branch 413.

[0034] like Figure 1 As shown, the inflation assembly 50 includes an inflation line 51 and an inflation valve assembly 52, with the inflation valve assembly 52 disposed on the inflation line 51. Specifically, as... Figure 1 As shown, the inflation pipeline 51 includes an inflation main line 511, a low-pressure inflation branch line 512, and a high-pressure inflation branch line 513. The inflation main line 511 is connected downstream of the gas transmission structure 30. The low-pressure inflation branch line 512 and the high-pressure inflation branch line 513 are connected in parallel downstream of the inflation main line 511. The low-pressure inflation branch line 512 is suitable for connecting to the low-pressure test gas storage structure 1000, and the high-pressure inflation branch line 513 is suitable for connecting to the high-pressure test gas storage structure 2000. The inflation valve group 52 includes a fourth valve body 521 installed on the inflation main line 511, a fifth valve body 522 installed on the low-pressure inflation branch line 512, and a sixth valve body 523 installed on the high-pressure inflation branch line 513.

[0035] It should be noted that when it is necessary to charge the low-pressure test gas storage structure 1000, the fourth valve body 521 and the fifth valve body 522 are opened, allowing the gas to enter the low-pressure test gas storage structure 1000 through the main charging line 511 and the low-pressure charging branch line 512; when it is necessary to charge the high-pressure test gas storage structure 2000, the fourth valve body 521 and the sixth valve body 523 are opened, allowing the gas to enter the high-pressure test gas storage structure 2000 through the main charging line 511 and the high-pressure charging branch line 513.

[0036] In this embodiment, as Figure 1 As shown, the upstream end of the inflation main 511 is connected to the gas transmission main 411, and the upstream end of the inflation main 511 is located downstream of the first valve body 421.

[0037] It is worth noting that when the low-pressure test gas storage structure 1000 and / or the high-pressure test gas storage structure 2000 are being filled with gas, the first valve body 421 needs to be opened.

[0038] like Figure 1 As shown, the low-pressure inflation branch 512 is connected to a low-pressure inflation pressure detection unit 5121 and a low-pressure inflation temperature detection unit 5122.

[0039] In this embodiment, as Figure 1As shown, the low-pressure water storage structure 10 contains two low-pressure test gas storage structures 1000. Therefore, the low-pressure gas filling branch 512 has two branches 5123, which are respectively connected to the two low-pressure test gas storage structures 1000. Specifically, as shown... Figure 1 As shown, each branch 5123 is provided with a seventh valve body 5124, and two low-pressure inflation pressure detection units 5121 and two low-pressure inflation temperature detection units 5122 are provided, and are respectively located on the two branches 5123.

[0040] It is worth noting that, please refer to Figure 1 When it is necessary to charge the low-pressure test gas storage structure 1000 located on the left, the first valve body 421, the fourth valve body 521, the fifth valve body 522 and the seventh valve body 5124 located on the left branch 5123 are opened; when it is necessary to charge the low-pressure test gas storage structure 1000 located on the right, the first valve body 421, the fourth valve body 521, the fifth valve body 522 and the seventh valve body 5124 located on the right branch 5123 are opened.

[0041] like Figure 1 As shown, the high-pressure inflation branch 513 is connected to a high-pressure inflation pressure detection unit 5131 and a high-pressure inflation temperature detection unit 5132.

[0042] like Figure 1 As shown, a flow detection unit 5111 is provided on the inflation main circuit 511 to detect the inflation flow.

[0043] In this embodiment, both the low-pressure inflation pressure detection unit 5121 and the high-pressure inflation pressure detection unit 5131 are pressure gauges, both the low-pressure inflation temperature detection unit 5122 and the high-pressure inflation temperature detection unit 5132 are thermometers, and the flow detection unit 5111 is a flow meter.

[0044] like Figure 1 As shown, the test device for the underwater gas storage structure also includes a low-pressure venting component 80 and a high-pressure venting component 90. The low-pressure venting component 80 is adapted to be connected to the low-pressure test gas storage structure 1000, and the high-pressure venting component 90 is adapted to be connected to the high-pressure test gas storage structure 2000.

[0045] By setting up the low-pressure venting component 80, the charging and venting characteristics of the low-pressure test gas storage structure 1000 and the fatigue failure mechanism of frequent charging and venting can be tested; by setting up the high-pressure venting component 90, the charging and venting characteristics of the high-pressure test gas storage structure 2000 and the fatigue failure mechanism of frequent charging and venting can be tested.

[0046] In this embodiment, as Figure 1As shown, the low-pressure venting assembly 80 includes a low-pressure venting pipeline 81 and an eighth valve body 82. The eighth valve body 82 is disposed on the low-pressure venting pipeline 81, and the low-pressure venting pipeline 81 is connected to the low-pressure inflation branch 512.

[0047] It should be noted that you should refer to [link / reference]. Figure 1 When venting the low-pressure test gas storage structure 1000, the fifth valve body 522 needs to be closed and the eighth valve body 82 needs to be opened. Specifically, when venting the low-pressure test gas storage structure 1000 located on the left side, the seventh valve body 5124 and the eighth valve body 82 located on the left branch 5123 need to be opened simultaneously; when venting the low-pressure test gas storage structure 1000 located on the right side, the seventh valve body 5124 and the eighth valve body 82 located on the right branch 5123 need to be opened simultaneously.

[0048] In this embodiment, as Figure 1 As shown, the high-pressure venting assembly 90 includes a high-pressure venting pipeline 91 and a ninth valve body 92. The ninth valve body 92 is disposed on the high-pressure venting pipeline 91, and the high-pressure venting pipeline 91 is connected to the high-pressure charging branch 513.

[0049] It should be noted that you should refer to [link / reference]. Figure 1 When venting the high-pressure test gas storage structure 2000, it is necessary to close the sixth valve body 523 and open the ninth valve body 92.

[0050] like Figure 1 As shown, the low-pressure water storage structure 10 is equipped with a low-pressure detection unit 100 and a low-pressure temperature detection unit 110. The low-pressure detection unit 100 is electrically connected to the low-pressure regulating component 60. Specifically, the low-pressure regulating component 60 includes a low-pressure regulating pipeline 61 and a tenth valve body 62. The tenth valve body 62 is disposed on the low-pressure regulating pipeline 61, which is connected to the low-pressure water storage structure 10. The low-pressure detection unit 100 is electrically connected to the tenth valve body 62. The valve opening of the tenth valve body 62 is controlled by the detection result of the low-pressure detection unit 100, thereby adjusting the air venting volume and air venting rate of the low-pressure water storage structure 10.

[0051] like Figure 1As shown, the high-pressure water storage structure 20 is equipped with a high-pressure detection unit 120 and a high-pressure temperature detection unit 130. The high-pressure detection unit 120 is electrically connected to the high-pressure regulating component 70. Specifically, the high-pressure regulating component 70 includes a high-pressure regulating pipeline 71 and an eleventh valve body 72. The eleventh valve body 72 is mounted on the high-pressure regulating pipeline 71, which is connected to the high-pressure water storage structure 20. The high-pressure detection unit 120 is electrically connected to the eleventh valve body 72. The valve opening of the eleventh valve body 72 is controlled by the detection result of the high-pressure detection unit 120, thereby adjusting the air venting volume and air venting rate of the high-pressure water storage structure 20.

[0052] In this embodiment, as Figure 1 As shown, the gas supply structure 30 includes a compressor 31 and a pressure stabilizing tank 32 connected together. A gas supply pipeline 41 and a gas filling pipeline 51 are connected and located downstream of the pressure stabilizing tank 32. The compressor 31 provides an additional gas source for simulating different water depth environments, while the pressure stabilizing tank 32 stores the high-pressure gas from the compressor 31, stabilizing the pressure and thus providing a stable gas source for the low-pressure water storage structure 10 and the high-pressure water storage structure 20.

[0053] like Figure 1 As shown, the test apparatus for the underwater gas storage structure also includes a water supply structure 140, which is connected to the low-pressure water storage structure 10 and the high-pressure water storage structure 20 via a water supply component 150. By providing the water supply structure 140, water is supplied to the low-pressure water storage structure 10 and the high-pressure water storage structure 20 during the test.

[0054] In this embodiment, as Figure 1 As shown, the water supply assembly 150 includes a water supply pipeline 151 and a water supply valve group 152, with the water supply valve group 152 mounted on the water supply pipeline 151. Specifically, the water supply pipeline 151 includes a main water supply line 1511, a low-pressure water supply branch line 1512, and a high-pressure water supply branch line 1513. The main water supply line 1511 is connected downstream of the water supply structure 140. The low-pressure water supply branch line 1512 and the high-pressure water supply branch line 1513 are connected in parallel downstream of the main water supply line 1511. The low-pressure water supply branch line 1512 is connected to the low-pressure water storage structure 10, and the high-pressure water supply branch line 1513 is connected to the high-pressure water storage structure 20. The water supply valve group 152 includes a twelfth valve body 1521 mounted on the low-pressure water supply branch line 1512 and a thirteenth valve body 1522 mounted on the high-pressure water supply branch line 1513.

[0055] In this embodiment, as Figure 1 As shown, the water supply structure 140 includes a water tank 141 and a water pump 142. The upstream end of the water supply main line 1511 is connected to the water tank 141. The water pump 142 is installed on the water supply main line 1511 and pumps the water in the water tank 141 to the low-pressure water storage structure 10 and the high-pressure water storage structure 20.

[0056] In this embodiment, as Figure 1 As shown, the test apparatus for the underwater gas storage structure also includes a drainage component 160, which is connected to the low-pressure water storage structure 10 and the high-pressure water storage structure 20. By providing the drainage component 160, the water in the low-pressure water storage structure 10 and the high-pressure water storage structure 20 can be drained after the test.

[0057] In this embodiment, as Figure 1 As shown, the drainage assembly 160 includes a drainage pipe 161 and a fourteenth valve body 162. The fourteenth valve body 162 is disposed on the drainage pipe 161. One end of the drainage pipe 161 is connected to the water tank 141, and the other end of the drainage pipe 161 is connected to the main water supply line 1511. That is, the water pump 142 and the fourteenth valve body 162 are arranged in parallel.

[0058] In this embodiment, the low-pressure water storage structure 10 is transparent, and the high-pressure water storage structure 20 is partially transparent. Making the low-pressure water storage structure 10 transparent allows for internal visualization, facilitating observation of the low-pressure test gas storage structure 1000 by personnel. Making the high-pressure water storage structure 20 at least partially transparent allows observation of the high-pressure test gas storage structure 2000 through the transparent portion. Furthermore, it facilitates comparison between high-pressure and low-pressure tests, enabling the inference and verification of high-pressure test patterns and phenomena based on low-pressure test patterns and phenomena, thus providing mutual corroboration.

[0059] It is worth noting that due to the high strength requirements of the high-pressure water storage structure 20, it is difficult to make the high-pressure water storage structure 20 fully visible. Therefore, in order to reduce costs and ensure safety, the high-pressure water storage structure 20 is made partially visible.

[0060] In this embodiment, as Figure 1 As shown, the test apparatus for the underwater gas storage structure also includes a tensile testing unit 170. The tensile testing unit 170 is located inside the low-pressure water storage structure 10, with one end connected to the bottom of the low-pressure water storage structure 10 and the other end connected to the low-pressure test gas storage structure 1000. By setting up the tensile testing unit 170, the buoyancy of the low-pressure test gas storage structure 1000 can be measured during the test.

[0061] It is worth noting that, in this embodiment, since the high-pressure water storage structure 20 is partially transparent, it would be inconvenient to view the tensile value if a tensile detection unit 170 were installed. Therefore, no tensile detection unit 170 is installed inside the high-pressure water storage structure 20.

[0062] In this embodiment, the tension detection unit 170 is a tension gauge.

[0063] like Figure 1 As shown, the low-pressure water storage structure 10 is connected to a low-pressure safety valve 180, and the high-pressure water storage structure 20 is connected to a high-pressure safety valve 190.

[0064] It should be noted that the low-pressure safety valve 180 is used to prevent overpressure in the low-pressure water storage structure 10, and the high-pressure safety valve 190 is used to prevent overpressure in the high-pressure water storage structure 20. Specifically, when the pressure inside the low-pressure water storage structure 10 reaches the opening pressure of the low-pressure safety valve 180, the low-pressure safety valve 180 automatically opens to release pressure; when the pressure inside the high-pressure water storage structure 20 reaches the opening pressure of the high-pressure safety valve 190, the high-pressure safety valve 190 automatically opens to release pressure; thereby achieving the purpose of protecting the test equipment and test pieces (low-pressure test gas storage structure 1000 and high-pressure test gas storage structure 2000) and preventing safety accidents.

[0065] It is worth noting that, please refer to Figure 1 The connection between the low-pressure gas transmission branch 412 and the low-pressure water storage structure 10 is located near the upper end of the low-pressure water storage structure 10, ensuring that the connection point is above the liquid level. Similarly, the connection between the low-pressure regulating pipeline 61 and the low-pressure water storage structure 10 is also located near the upper end of the low-pressure water storage structure 10, ensuring that the connection point is above the liquid level. The connection between the high-pressure gas transmission branch 413 and the high-pressure water storage structure 20 is located near the upper end of the high-pressure water storage structure 20, ensuring that the connection point is above the liquid level. Likewise, the connection between the high-pressure regulating pipeline 71 and the high-pressure water storage structure 20 is also located near the upper end of the high-pressure water storage structure 20, ensuring that the connection point is above the liquid level.

[0066] Example 2

[0067] This embodiment provides a specific implementation of a test method for underwater gas storage structures, applied to the test apparatus of the underwater gas storage structure in Embodiment 1, including the following steps:

[0068] The low-pressure test gas storage structure 1000 is tested by submerging the low-pressure test gas storage structure 1000 with liquid level in the low-pressure water storage structure 10. Gas is supplied to the low-pressure water storage structure 10 through the gas supply structure 30 and gas supply component 40 to bring the low-pressure water storage structure 10 to a predetermined low-pressure test pressure. Gas is supplied to the low-pressure test gas storage structure 1000 through the gas supply structure 30 and gas filling component 50. The predetermined low-pressure test pressure is maintained in the low-pressure water storage structure 10 through the low-pressure pressure regulating component 60.

[0069] The high-pressure test gas storage structure 2000 is tested by submerging the high-pressure test gas storage structure 20 with liquid in the high-pressure water storage structure 20. Gas is supplied to the high-pressure water storage structure 20 through the gas supply structure 30 and the gas supply component 40 to bring the high-pressure water storage structure 20 to the predetermined high-pressure test pressure. Gas is then supplied to the high-pressure test gas storage structure 2000 through the gas supply structure 30 and the gas filling component 50. The predetermined high-pressure test pressure is maintained in the high-pressure water storage structure 20 through the high-pressure pressure regulating component 70.

[0070] During the test of the low-pressure test gas storage structure 1000, after the low-pressure test gas storage structure 1000 is filled with gas, the gas is released through the low-pressure venting component 80 connected to the low-pressure test gas storage structure 1000.

[0071] During the test of the high-pressure test gas storage structure 2000, after the high-pressure test gas storage structure 2000 is filled with gas, the gas is released through the high-pressure venting component 90 connected to the high-pressure test gas storage structure 2000.

[0072] In this embodiment, when testing the low-pressure test gas storage structure 1000, the third valve body 423, the sixth valve body 523, the ninth valve body 92, the thirteenth valve body 1522, and the fourteenth valve body 162 are closed, the twelfth valve body 1521 is opened, and the water pump 142 is turned on to inject water into the low-pressure water storage structure 10 until the liquid level submerges the low-pressure test gas storage structure 1000. Then, the water pump 142 and the twelfth valve body 1521 are closed; the fourth valve body 521 is closed, and the first valve body 421 and the second valve body 422 are opened. The compressor 31 and the pressure stabilizing tank 32 are used to supply gas into the low-pressure water storage structure 10, so that the low-pressure gas storage... The pressure inside the water structure 10 reaches the predetermined low-pressure test pressure; the second valve body 422 is closed, and the fourth valve body 521, the fifth valve body 522, and the seventh valve body 5124 are opened to inflate the low-pressure test gas storage structure 1000. Furthermore, based on the detection results of the low-pressure pressure detection unit 100, the tenth valve body 62 is adjusted to maintain the predetermined low-pressure test pressure inside the low-pressure water storage structure 10. During the test, the inflation flow rate is measured by the flow detection unit 5111, and the pressure and temperature of the low-pressure inflation branch 512 are detected by the low-pressure inflation pressure detection unit 5121 and the low-pressure inflation temperature detection unit 5122. When venting the low-pressure test gas storage structure 1000, the fifth valve body 522 is closed, and the seventh valve body 5124 and the eighth valve body 82 are opened.

[0073] It should be noted that the low-pressure test gas storage structure 1000 can be circulated and the test can be repeated after inflation and deflation.

[0074] It is worth further explaining that the test method for the underwater gas storage structure in this embodiment can be used to conduct the following low-pressure test gas storage structure 1000 characteristic tests: (a) studying the gas filling and discharging characteristics of the flexible gas storage structure under low water pressure, and obtaining the relationship between temperature and pressure changes in the gas storage structure during the gas filling and discharging process; (b) studying the gas filling and discharging characteristics of flexible gas storage structures of different shapes by conducting gas filling and discharging tests of flexible gas storage structures of different shapes under low water pressure; (c) conducting frequent gas filling and discharging tests of flexible gas storage structures under low water pressure, and obtaining the fatigue failure mechanism of flexible gas storage structures under low water pressure.

[0075] In this embodiment, when testing the high-pressure test gas storage structure 2000, the second valve body 422, the fifth valve body 522, the eighth valve body 82, the seventh valve body 5124, and the twelfth valve body 1521 are closed, the thirteenth valve body 1522 is opened, and the water pump 142 is turned on to inject water into the high-pressure water storage structure 20 until the liquid level submerges the high-pressure test gas storage structure 2000. Then, the water pump 142 and the thirteenth valve body 1522 are closed; the fourth valve body 521 is closed, and the first valve body 421 and the third valve body 423 are opened. The compressor 31 and the pressure stabilizing tank 32 are used to supply gas into the high-pressure water storage structure 20, so that... The pressure inside the high-pressure water storage structure 20 reaches the predetermined high-pressure test pressure; the third valve body 423 is closed, and the fourth valve body 521 and the sixth valve body 523 are opened to charge the high-pressure test air storage structure 2000 with air. Furthermore, based on the detection results of the high-pressure pressure detection unit 120, the eleventh valve body 72 is adjusted to maintain the predetermined high-pressure test pressure inside the high-pressure water storage structure 20. During the test, the air flow rate is measured by the flow detection unit 5111, and the pressure and temperature of the high-pressure air charging branch 513 are detected by the high-pressure air charging pressure detection unit 5131 and the high-pressure air charging temperature detection unit 5132. When venting the high-pressure test air storage structure 2000, the sixth valve body 523 is closed, and the ninth valve body 92 is opened.

[0076] It should be noted that the high-pressure test gas storage structure 2000 can be circulated and repeatedly tested by filling and then degassing it.

[0077] It is worth further explaining that the high-pressure test gas storage structure 2000 characteristic test that can be carried out using the test method of the underwater gas storage structure in this embodiment includes: (a) studying the gas filling and discharging characteristics of the flexible gas storage structure under high water pressure and comparing them with the gas filling and discharging characteristics of the flexible gas storage structure under low pressure to obtain the relationship between the internal temperature and pressure changes of the gas storage structure under high water pressure; (b) studying the gas filling and discharging characteristics of flexible gas storage structures of different shapes under high water pressure by carrying out gas filling and discharging tests of flexible gas storage structures of different shapes, and determining the influence law of water pressure on the gas filling and discharging characteristics of gas storage structures of different shapes; (c) carrying out frequent gas filling and discharging tests of flexible gas storage structures under high water pressure to obtain the gas filling and discharging fatigue failure mechanism of flexible gas storage structures under high water pressure, and comparing it with the fatigue failure of flexible gas storage structures under low water pressure.

[0078] Based on the above description, this patent application has the following advantages:

[0079] 1. The gas storage characteristics of flexible gas storage structures under different water pressures were simulated and investigated using the air-water pressurization method, which greatly reduced the difficulty of studying the working characteristics of flexible gas storage structures in a real water environment;

[0080] 2. Meet the testing requirements for pressure and flow rate under different operating conditions of underwater gas storage structures;

[0081] 3. Improve test reliability and reduce test costs.

[0082] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A test device for an underwater gas storage structure, characterized in that, include: A low-pressure water storage structure (10) is internally adapted to accommodate a low-pressure test gas storage structure (1000). High-pressure water storage structure (20), the interior of which is suitable for accommodating high-pressure test gas storage structure (2000). The gas transmission structure (30) is connected to the low-pressure water storage structure (10) and the high-pressure water storage structure (20) via the gas transmission component (40), and is adapted to be connected to the low-pressure test gas storage structure (1000) and the high-pressure test gas storage structure (2000) via the gas filling component (50); A low-pressure regulating component (60) is connected to the low-pressure water storage structure (10); A high-pressure regulating component (70) is connected to the high-pressure water storage structure (20); Gas is supplied to the low-pressure water storage structure (10) through the gas supply structure (30) and the gas supply component (40) to bring the low-pressure water storage structure (10) to a predetermined low-pressure test pressure. Gas is supplied to the low-pressure test gas storage structure (1000) through the gas supply structure (30) and the gas filling component (50), and the predetermined low-pressure test pressure is maintained in the low-pressure water storage structure (10) through the low-pressure regulating component (60). The low-pressure water storage structure is used to simulate a low water pressure environment. Gas is supplied to the high-pressure water storage structure (20) through the gas supply structure (30) and the gas supply component (40) to bring the high-pressure water storage structure (20) to a predetermined high-pressure test pressure. Gas is supplied to the high-pressure test gas storage structure (2000) through the gas supply structure (30) and the gas filling component (50), and the high-pressure water storage structure (20) is maintained at the predetermined high-pressure test pressure through the high-pressure regulating component (70). The high-pressure water storage structure is used to simulate a high water pressure environment.

2. The test apparatus for the underwater gas storage structure according to claim 1, characterized in that, The gas delivery assembly (40) includes a gas delivery pipeline (41) and a gas delivery valve group (42), wherein the gas delivery valve group (42) is disposed on the gas delivery pipeline (41); The inflation assembly (50) includes an inflation line (51) and an inflation valve assembly (52), the inflation valve assembly (52) being disposed on the inflation line (51).

3. The test apparatus for the underwater gas storage structure according to claim 2, characterized in that, The gas transmission pipeline (41) includes a main gas transmission pipeline (411), a low-pressure gas transmission branch (412), and a high-pressure gas transmission branch (413). The main gas transmission pipeline (411) is connected downstream of the gas transmission structure (30). The low-pressure gas transmission branch (412) and the high-pressure gas transmission branch (413) are connected in parallel downstream of the main gas transmission pipeline (411). The low-pressure gas transmission branch (412) is connected to the low-pressure water storage structure (10), and the high-pressure gas transmission branch (413) is connected to the high-pressure water storage structure (20). The gas transmission valve group (42) includes a first valve body (421) on the main gas transmission pipeline (411), a second valve body (422) on the low-pressure gas transmission branch (412), and a third valve body (423) on the high-pressure gas transmission branch (413). The inflation pipeline (51) includes an inflation main line (511), a low-pressure inflation branch line (512), and a high-pressure inflation branch line (513). The inflation main line (511) is connected downstream of the gas transmission structure (30). The low-pressure inflation branch line (512) and the high-pressure inflation branch line (513) are connected in parallel downstream of the inflation main line (511). The low-pressure inflation branch line (512) is adapted to connect to the low-pressure test gas storage structure (1000), and the high-pressure inflation branch line (513) is adapted to connect to the high-pressure test gas storage structure (2000). The inflation valve group (52) includes a fourth valve body (521) on the inflation main line (511), a fifth valve body (522) on the low-pressure inflation branch line (512), and a sixth valve body (523) on the high-pressure inflation branch line (513).

4. The test apparatus for the underwater gas storage structure according to claim 3, characterized in that, The low-pressure inflation branch (512) is connected to a low-pressure inflation pressure detection unit (5121) and / or a low-pressure inflation temperature detection unit (5122); the high-pressure inflation branch (513) is connected to a high-pressure inflation pressure detection unit (5131) and / or a high-pressure inflation temperature detection unit (5132); and the inflation main line (511) is equipped with a flow detection unit (5111).

5. The test apparatus for the underwater gas storage structure according to any one of claims 1-4, characterized in that, The test device for the underwater gas storage structure further includes a low-pressure venting component (80) and a high-pressure venting component (90). The low-pressure venting component (80) is adapted to be connected to the low-pressure test gas storage structure (1000), and the high-pressure venting component (90) is adapted to be connected to the high-pressure test gas storage structure (2000).

6. The test apparatus for the underwater gas storage structure according to any one of claims 1-4, characterized in that, The low-pressure water storage structure (10) is connected to a low-pressure detection unit (100) and / or a low-pressure temperature detection unit (110), and the low-pressure detection unit (100) is electrically connected to the low-pressure regulating component (60); The high-pressure water storage structure (20) is connected to a high-pressure detection unit (120) and / or a high-pressure temperature detection unit (130), and the high-pressure detection unit (120) is electrically connected to the high-pressure regulating component (70).

7. The test apparatus for the underwater gas storage structure according to any one of claims 1-4, characterized in that, The test apparatus for the underwater gas storage structure also includes a water supply structure (140), which is connected to the low-pressure water storage structure (10) and the high-pressure water storage structure (20) via a water supply component (150); and / or, The low-pressure water storage structure (10) is transparent, and the high-pressure water storage structure (20) is at least partially transparent.

8. A test method for an underwater gas storage structure, applied to the test apparatus for the underwater gas storage structure according to any one of claims 1-7, characterized in that, include: The low-pressure test gas storage structure (1000) is tested by submerging the low-pressure test gas storage structure (1000) with liquid in the low-pressure water storage structure (10). Gas is supplied to the low-pressure water storage structure (10) through the gas supply structure (30) and the gas supply component (40) to bring the low-pressure water storage structure (10) to a predetermined low-pressure test pressure. Gas is supplied to the low-pressure test gas storage structure (1000) through the gas supply structure (30) and the gas filling component (50). The predetermined low-pressure test pressure is maintained in the low-pressure water storage structure (10) by adjusting the low-pressure pressure regulating component (60). The high-pressure test gas storage structure (2000) is tested by submerging the high-pressure test gas storage structure (2000) with liquid in the high-pressure water storage structure (20). Gas is supplied to the high-pressure water storage structure (20) through the gas supply structure (30) and the gas supply component (40) to make the high-pressure water storage structure (20) reach the predetermined high-pressure test pressure. Gas is supplied to the high-pressure test gas storage structure (2000) through the gas supply structure (30) and the gas filling component (50). The predetermined high-pressure test pressure is maintained in the high-pressure water storage structure (20) by adjusting the high-pressure pressure regulating component (70).

9. The test method for the underwater gas storage structure according to claim 8, characterized in that, During the test of the low-pressure test gas storage structure (1000), after the gas is filled into the low-pressure test gas storage structure (1000), the gas is released through the low-pressure venting component (80) connected to the low-pressure test gas storage structure (1000); During the test of the high-pressure test gas storage structure (2000), after the gas is filled into the high-pressure test gas storage structure (2000), the gas is released through the high-pressure venting component (90) connected to the high-pressure test gas storage structure (2000).

10. The test method for the underwater gas storage structure according to claim 9, characterized in that, The low-pressure test gas storage structure (1000) is inflated and then deflated, and the test is repeated in a cycle. The high-pressure test gas storage structure (2000) is filled with gas and then released, and the test is repeated in a cycle.

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