Compressed air model test apparatus, system and method for simulating gas storage chamber

Abstract

The present application relates to gas storage chamber simulation test technical field, specifically to a kind of compressed air model test device, system and method for simulating gas storage chamber, test device includes outer cylinder, and by outer to inside sequentially attached in outer cylinder simulation sliding layer, simulation lining layer and simulation sealing layer, simulation sealing layer includes sealing cylinder, several deformation grooves are formed on sealing cylinder, deformation groove is along the ring of sealing cylinder Distribution, deformation groove is along the radial of sealing cylinder and inwardly convex and located in the inner cavity of simulation lining layer, deformation groove is filled with elastic deformation piece, and elastic deformation piece is located between sealing cylinder and simulation lining layer in radial direction;Sealing cylinder can be radially expanded when being subjected to internal pressure and compresses deformation groove and elastic deformation piece.Test device simulates to form similar gas storage chamber structure to carry out pressure test, the deformation parameter of simulation lining layer can be monitored to study the failure mechanism and law of lining, and the deformation and sealing performance of simulation sealing layer can also be tested by pressure test.

Description

Technical Field

[0001] This invention relates to the field of gas storage chamber simulation testing technology, and in particular to a compressed air model testing device, system and method for simulating a gas storage chamber. Background Technology

[0002] Artificial gas storage chambers offer flexible site selection, excellent durability, and reasonable economic efficiency, making them a popular choice for compressed air energy storage projects currently under construction or in the planning stages. However, during the operation of compressed air energy storage power plants, these chambers must withstand high internal pressures of 10–15 MPa, temperature and pressure coupling effects, and cyclic load changes. Under internal pressure, the lining structure and surrounding rock of the chamber will experience damage. The safety and airtightness of artificial gas storage chambers significantly impact the operational safety and power storage efficiency of compressed air energy storage power plants. Therefore, it is necessary to study the distribution and morphology of cracks in the lining structure caused by expansion and deformation under internal pressure, as well as the changes in the structural integrity and airtightness characteristics of the sealing structure under crack and storage chamber operating conditions. Currently, however, there is a lack of effective experimental equipment and methods to realistically simulate chamber operating conditions and study the changes in these structural characteristics under pressure. Summary of the Invention

[0003] The purpose of this invention is to overcome the technical problem that existing technologies cannot achieve a realistic simulation of the working conditions of a gas storage chamber for crack and airtightness testing, and to provide a compressed air model test device, system and method for simulating a gas storage chamber.

[0004] In a first aspect, the present invention provides a compressed air model test device for simulating a gas storage chamber, comprising an outer cylinder and a simulated sliding layer, a simulated lining layer, and a simulated sealing layer sequentially attached to the outer cylinder from the outside to the inside. The simulated sealing layer includes a sealing cylinder with a plurality of deformation grooves formed thereon. The plurality of deformation grooves are arranged circumferentially along the sealing cylinder and protrude radially inward along the sealing cylinder and are located in the inner cavity of the simulated lining layer. The deformation grooves are filled with elastic deformation members, which are located radially between the sealing cylinder and the simulated lining layer. The sealing cylinder is capable of radially expanding and compressing the deformation grooves and the elastic deformation members when subjected to internal pressure.

[0005] By sequentially setting a simulated sliding layer, a simulated lining layer, and a simulated sealing layer in the test cylinder, a structure similar to that of an actual gas storage chamber can be formed for pressure testing. Multiple inwardly convex deformation grooves (grooves) can be formed on the simulated sealing layer, and elastic deformation elements are set in the deformation grooves. When the simulated sealing layer is subjected to internal pressure, it expands radially and compresses the elastic deformation elements. This allows a portion of the deformation grooves to fit tightly against the simulated lining layer to compensate for the increase in the perimeter of the simulated sealing layer after expansion, enabling the simulated sealing layer to undergo adaptive deformation while maintaining its sealing performance. When subjected to internal pressure, the simulated lining layer can expand radially synchronously with the simulated sealing layer and compress the simulated sliding layer. After the simulated lining layer expands under pressure, it may undergo plastic deformation such as cracking. The deformation parameters of the simulated lining layer can be monitored to study the failure mechanism and law of the lining. The pressure test can also test the deformation and sealing performance of the simulated sealing layer.

[0006] Preferably, the simulated sealing layer further includes two end plates, which are fixedly connected to both ends of the sealing cylinder. The two ends of the deformation groove are respectively connected to the two end plates. The deformation groove is also filled with a rigid filler, which abuts against the two end plates. The elastic deformation member is located between the rigid fillers on both sides of the sealing cylinder in the axial direction.

[0007] The rigid filler can be placed in the deformation groove near the end plate to prevent the deformation groove from deforming at the end plate under pressure, thus avoiding the disconnection between the deformation groove and the end plate and causing sealing failure. The rigid filler can ensure that the deformation groove and the end plate remain relatively fixed. Here, the rigid filler can be concrete, steel or other rigid materials.

[0008] Preferably, a number of pins are evenly distributed on the side of the end plate facing the simulated lining layer and on the inner wall of the outer cylinder.

[0009] One end of the pin can be fixedly connected to the end plate and the inner wall of the outer cylinder and embedded in the simulated lining layer. This can anchor the end plate to the simulated lining and prevent relative displacement between the end plate and the lining from causing instability when under pressure.

[0010] Preferably, the simulated lining layer is embedded with reinforcing bars, the reinforcing bars are provided with rollers that can contact the inner wall of the simulated sliding layer, and strain gauges are attached to the reinforcing bars.

[0011] By incorporating reinforcing bars into the simulated lining layer, the lining structure of the actual chamber can be replicated, allowing the simulated lining layer to reproduce the tensile strength of the actual chamber lining. Rollers on the reinforcing bars facilitate their installation within the outer cylinder. The reinforcing bars can be pre-tied to form a reinforcing cage structure, and then pushed axially into the outer cylinder using rollers to install the simulated sealing layer. After installing the parameter monitoring equipment and the end caps of the outer cylinder, concrete can be poured into the outer cylinder to form the simulated lining layer structure. Strain gauges on the reinforcing bars allow for real-time monitoring of the strain parameters of the simulated lining layer during the experiment.

[0012] Preferably, the outer cylinder is provided with grouting channels and air holes.

[0013] Concrete can be poured through grouting channels set on the outer cylinder to form a simulated lining layer, and the pores can play a role in venting during pouring.

[0014] Preferably, a plurality of fiber optic grating sensors are arranged at the bottom of the deformation groove.

[0015] Setting fiber optic grating sensors in the deformation groove allows for real-time monitoring of various parameters of the simulated sealing layer during experiments.

[0016] Preferably, the fiber optic grating sensor includes a temperature sensor, a strain gauge, and a water leakage sensor.

[0017] Setting up temperature sensors, strain gauges, and water leakage sensors allows for the measurement of temperature, deformation, and sealing performance parameters.

[0018] In a second aspect, the present invention provides a compressed air model test system for simulating a gas storage chamber, including a pressure source, pipelines, and a compressed air model test device for simulating a gas storage chamber as described above, wherein the pressure source is connected to the inner cavity of the outer cylinder through the pipelines.

[0019] The pressure can be applied to the test device through a pressure source and connected pipelines.

[0020] Preferably, the pipeline is equipped with a pressure gauge and a pressure relief valve.

[0021] The pressure gauge can be set to measure the pressure inside the test device. The pressure relief valve can be opened to reduce the pressure after the test or when the pressure exceeds the preset test pressure.

[0022] In a third aspect, the present invention provides a compressed air model test method for simulating a gas storage chamber, characterized in that it employs the compressed air model test system for simulating a gas storage chamber as described above, comprising: S1: pressurizing the inner cavity of the outer cylinder to a preset pressure through the pressure source; S2: maintaining the pressure in the inner cavity of the outer cylinder to a preset duration, and monitoring the temperature, pressure parameters, and strain parameters of the simulated lining layer and the sealing layer in the outer cylinder; S3: depressurizing the inner cavity of the outer cylinder.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] This invention provides a compressed air model testing device, system, and method for simulating a gas storage chamber. By sequentially setting a simulated sliding layer, a simulated lining layer, and a simulated sealing layer in the test cylinder, a structure similar to an actual gas storage chamber can be formed for pressure testing. Multiple inwardly convex deformation grooves (recesses) can be formed on the simulated sealing layer, and elastic deformation elements are set in the deformation grooves. When the simulated sealing layer is subjected to internal pressure, it expands radially and compresses the elastic deformation elements. This allows a portion of the deformation grooves to fit tightly against the simulated lining layer to compensate for the increase in the perimeter of the simulated sealing layer after expansion, enabling the simulated sealing layer to undergo adaptive deformation while maintaining its sealing performance. When subjected to internal pressure, the simulated lining layer can expand radially synchronously with the simulated sealing layer and compress the simulated sliding layer. After the simulated lining layer expands under pressure, it may undergo plastic deformation such as cracking. The deformation parameters of the simulated lining layer can be monitored to study the failure mechanism and law of the lining. The pressure test can also test the deformation and sealing performance of the simulated sealing layer. Attached image description:

[0025] Figure 1 This is a schematic diagram of the compressed air model test device for simulating a gas storage chamber according to the present invention.

[0026] Figure 2 This is a radial cross-sectional view of the compressed air model test device for simulating a gas storage chamber of the present invention at the location of the simulated sealing layer.

[0027] Figure 3 This is a radial cross-sectional view of the compressed air model test device for simulating a gas storage chamber of the present invention, outside the simulated sealing layer.

[0028] Figure 4 This is a schematic diagram showing the sensor layout in the circumferential direction of the simulated sealing layer.

[0029] Figure 5 This is a schematic diagram simulating the layout of monitoring points for the reinforcing steel bars in the lining layer.

[0030] Figure 6 This is a schematic diagram simulating the layout of monitoring points for the concrete lining layer.

[0031] Marked in the image:

[0032] 1. Outer cylinder; 2. Simulated sliding layer; 3. Simulated lining layer; 4. Simulated sealing layer; 41. Sealing cylinder; 411. Deformation groove; 42. End plate; 43. Elastic deformation component; 44. Rigid filler component; 5. Pin; 6. Pressure channel; 61. Pressure relief channel; 7. Grouting channel; 8. Vent; 91. Temperature sensor; 92. Pressure sensor; 93. Water leakage sensor; 94. Strain gauge; 95. Fiber optic grating sensing line; 96. Concrete strain gauge; 10. Reinforcing steel. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0034] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0035] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0036] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0037] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0038] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0039] Example 1

[0040] This embodiment provides a compressed air model test device for simulating a gas storage chamber.

[0041] Figure 1 This is a schematic diagram of the compressed air model test device for simulating a gas storage chamber according to the present invention; Figure 2 This is a cross-sectional view of the compressed air model test device for simulating a gas storage chamber according to the present invention; Figure 3 This is a radial cross-sectional view of the compressed air model test device for simulating a gas storage chamber of the present invention, outside the simulated sealing layer; Figure 4 This is a schematic diagram showing the sensor layout in the circumferential direction of the simulated sealing layer; Figure 5 A schematic diagram simulating the layout of monitoring points for the reinforcement of the lining layer; Figure 6 This is a schematic diagram simulating the layout of monitoring points for the concrete lining layer.

[0042] like Figures 1 to 6As shown in the figure, the compressed air model test device for simulating a gas storage chamber described in this embodiment may include an outer cylinder 1, and a simulated sliding layer 2, a simulated lining layer 3, and a simulated sealing layer 4 sequentially attached to the outer cylinder 1 from the outside to the inside. The simulated sealing layer 4 includes a sealing cylinder 41, on which two opposing deformation grooves 411 are formed. The deformation grooves 411 protrude radially inward along the sealing cylinder 41 and are located in the inner cavity of the simulated lining layer 3. The deformation grooves 411 are filled with elastic deformation elements 43, which are located radially between the sealing cylinder 41 and the simulated lining layer 3. The sealing cylinder 41 can expand radially and compress the deformation grooves 411 and the elastic deformation elements 43 when subjected to internal pressure. Here, the number of deformation grooves 411 may be one or more, and multiple deformation grooves 411 may be arranged circumferentially along the sealing cylinder 41. The elastic deformation elements 43 may be rubber blocks that match the deformation grooves 411, or other elastic materials. The present invention does not specifically limit the number of deformation grooves 411 on the simulated sealing layer 4 or the material of the elastic deformation elements 43.

[0043] By sequentially setting a simulated sliding layer 2, a simulated lining layer 3, and a simulated sealing layer 4 in the test cylinder, a structure similar to that of an actual gas storage chamber can be formed for pressure testing. Multiple inwardly convex deformation grooves 411 (grooves) can be formed on the simulated sealing layer 4, and elastic deformation elements 43 can be set in the deformation grooves 411. When the simulated sealing layer 4 is subjected to internal pressure, it can expand radially and compress the elastic deformation elements 43. This allows a portion of the deformation grooves 411 to be tightly attached to the simulated lining layer 3 to compensate for the increase in the perimeter of the simulated sealing layer 4 after expansion, so that the simulated sealing layer 4 undergoes adaptive deformation while maintaining its sealing performance. When the simulated lining layer 3 is subjected to internal pressure, it can expand radially synchronously with the simulated sealing layer 4 and compress the simulated sliding layer 2. After the simulated lining layer 3 expands under pressure, it may undergo plastic deformation such as cracking. The deformation parameters of the simulated lining layer 3 can be monitored to study the failure mechanism and law of the lining. The pressure test can also test the deformation and sealing performance of the simulated sealing layer 4.

[0044] The outer cylinder 1 may be provided with a pressure channel 6, which can penetrate the side wall of the outer cylinder 1, the simulated sliding layer 2, the simulated lining layer 3 and the simulated sealing layer 4. High pressure gas can be pressurized in the inner cavity of the outer cylinder 1 along the pressure channel 6 to conduct a pressure test. After the test, the high pressure gas in the inner cavity of the outer cylinder 1 can also be discharged from the outer cylinder 1 along the pressure channel 6 to release the pressure. Of course, an exhaust channel penetrating into the inner cavity can also be provided on the outer cylinder 1, and the exhaust process can be carried out through the exhaust channel.

[0045] In this embodiment, the simulated sealing layer 4 further includes two end plates 42, which are fixedly connected to both ends of the sealing cylinder 41. The two ends of the deformation groove 411 are respectively connected to the two end plates 42. The deformation groove 411 is also filled with rigid fillers 44, which abut against the two end plates 42 respectively. The elastic deformation member 43 is located between the rigid fillers 44 on both sides in the axial direction of the sealing cylinder 41.

[0046] The rigid filler 44 can be set in the deformation groove 411 near the end plate 42 to prevent the deformation groove 411 from deforming at the end plate 42 under pressure, thus preventing the connection between the deformation groove 411 and the end plate 42 from breaking and causing sealing failure; the rigid filler 44 can ensure that the deformation groove 411 and the end plate 42 remain relatively fixed; here, the rigid filler 44 can be concrete, steel or other rigid materials.

[0047] In this embodiment, multiple pins 5 are evenly distributed on the side of the end plate 42 facing the simulated lining layer 3 and on the inner wall of the outer cylinder 1. One end of the pin 5 can be fixedly connected to the end plate 42 and the inner wall of the outer cylinder 1 and embedded in the simulated lining layer 3, which can anchor the end plate 42 to the simulated lining and prevent relative displacement between the end plate 42 and the lining under pressure, thus avoiding instability. Specifically, the pins 5 distributed on the inner wall of the outer cylinder 1 can be concentrated at the end cap of the outer cylinder 1 and outside the projection range of the simulated sealing layer 4 on the outer cylinder 1. Since no steel reinforcement is provided in the simulated lining layer 3 between the simulated sealing layer 4 and the end cap of the outer cylinder 1, pins 5 are needed to fix the end plate 42 and the outer cylinder 1.

[0048] In this embodiment, reinforcing bars 10 are embedded in the simulated lining layer 3. Rollers (not shown in the figure) are mounted on the circumferential reinforcing bars, capable of contacting the inner wall of the simulated sliding layer 2. Strain gauges 94 are attached to the reinforcing bars 10. The reinforcing bars 10 in the simulated lining layer 3 simulate the lining structure of the actual chamber, allowing the simulated lining layer 3 to replicate the tensile strength of the actual chamber lining. The rollers on the circumferential reinforcing bars facilitate installation within the outer cylinder 1. The circumferential and longitudinal reinforcing bars can be tied together to form a reinforcing cage structure, which is then pushed axially into the outer cylinder 1 using rollers. The simulated sealing layer 4 is then installed, the parameter monitoring equipment is installed, and the end cap of the outer cylinder 1 is installed. Concrete can then be poured into the outer cylinder 1 to form the simulated lining layer 3 structure. The strain gauges 94 on the circumferential reinforcing bars allow for real-time monitoring of the strain parameters of the simulated lining layer 3 during the experiment. Figure 6 As shown, concrete strain gauges 96 are also embedded in multiple locations in the concrete of the simulated lining layer 3 to monitor the deformation of the concrete under pressure. The two ends of the concrete strain gauges 96 can be fixed to the reinforcing bars 10.

[0049] Optionally, the outer cylinder 1 is provided with grouting channels 7 and vents 8. Concrete can be poured through the grouting channels 7 on the outer cylinder 1 to form a simulated lining layer 3, and the vents 8 can be used to vent air during pouring.

[0050] Multiple sets of circumferential fiber Bragg grating sensors are arranged inside the sealing steel liner 4, and multiple sets of circumferential resistive plates are arranged on the outer side of the sealing steel liner 4. The fiber Bragg grating sensors inside the sealing steel liner 4 and the resistive plates on the outer side can monitor various parameters of the simulated sealing layer 4 in real time during the experiment.

[0051] The fiber optic grating sensor includes a temperature sensor 91, a strain gauge 92, and an external water leakage sensor 93. The temperature sensor 91, strain gauge 92, and water leakage sensor 93 can be used to measure temperature, deformation, and sealing performance parameters.

[0052] Specifically, one possible arrangement of the fiber Bragg grating sensor in the simulated sealing layer with the four rings facing upwards is as follows: Figure 4 As shown, strain gauges 94 (i.e., strain sensors) are provided on the arc-shaped portion of the bottom of the deformation groove 411, and multiple strain gauges 94 are also provided on the arc-shaped portion formed at the connection between the deformation groove 411 and the simulated sealing layers 4 on both sides. Here, the arc-shaped portion of the bottom of the deformation groove 411 and the arc-shaped portion formed at the connection between the deformation groove 411 and the simulated sealing layers 4 on both sides are the main deformation areas, that is, the stress concentration points during deformation. In addition, strain gauges 94 and temperature sensors 91 are also provided on the simulated sealing layer 4 between the two deformation grooves 411. The sensors in the same circumferential direction can be connected through fiber optic grating sensing lines 95. That is, the fiber optic grating sensing lines 95 can be wrapped inside the simulated sealing layer 4. Multiple circumferentially arranged fiber optic grating sensing lines 95 can be arranged in the axial direction of the simulated sealing layer 4. The arrangement of sensors on each ring can be the same or different. For example, in the case of... Figure 4 In the circumferential direction shown, the arc-shaped part of the bottom of the deformation groove 411 can be equipped with a water leakage sensor 93 to monitor water leakage. The arrangement of the sensors in each circumferential direction can be selected according to the actual test needs, and the present invention does not make specific limitations on this.

[0053] Axial fiber grating sensing lines (not shown in the figure) can also be connected between adjacent circumferential fiber grating sensing lines 95 in the axial direction of the simulated sealing layer 4. The axial fiber grating sensing lines can connect the various sensors in the axial direction and pass through the sealed steel liner 4 through the set sealing device to ensure the airtightness of the sealed steel liner 4.

[0054] Specifically, the static resistance strain gauges are arranged circumferentially along the outer side of the sealing steel liner 4, and the circumferential arrangement of the static resistance strain gauges is as follows: Figure 4The fiber grating sensors shown are arranged in relatively consistent positions. Specifically, the static resistance strain gauge is arranged on the outside of the sealed steel liner 4, and the fiber grating sensor is arranged on the inside of the sealed steel liner 4.

[0055] Example 2

[0056] This embodiment provides a compressed air model test system for simulating a gas storage chamber.

[0057] The compressed air model test system for simulating a gas storage chamber described in this embodiment may include a pressure source, pipelines, and the compressed air model test device for simulating a gas storage chamber as described above. The pressure source is connected to the inner cavity of the outer cylinder 1 through the pipelines. Specifically, one end of the pipeline can be connected to the pressure source, and the other end can be connected to the pressure channel 6 provided on the outer cylinder 1. The pressure source can pressurize the inner cavity of the outer cylinder 1 through the pipelines for testing. Here, the pressure source can be a pressure device such as an air compressor.

[0058] Optionally, pressure gauges and pressure relief valves can be installed on the pipeline. Pressure gauges measure the pressure within the testing apparatus, and pressure relief valves can be opened to reduce pressure after the test or when the pressure exceeds the preset test pressure. Alternatively, a pressure relief channel 61 can be separately installed in the testing apparatus. This channel 61 can pass through the outer cylinder 1, the simulated sliding layer 2, the simulated lining layer 3, and the simulated sealing layer 4, communicating with the inner cavity of the simulated sealing layer 4. In other words, pressurization and depressurization operations can be performed through pressure channel 6 and pressure relief channel 61, respectively.

[0059] It should be noted that the compressed air model test device for simulating a gas storage chamber described in this embodiment is the same as the compressed air model test device for simulating a gas storage chamber described in Embodiment 1, and will not be described in detail in this embodiment.

[0060] Example 3

[0061] This embodiment provides a method for testing a compressed air model that simulates a gas storage chamber.

[0062] The compressed air model test method for simulating a gas storage chamber described in this embodiment uses the compressed air model test system for simulating a gas storage chamber described in Embodiment 2.

[0063] The compressed air model test method for simulating a gas storage chamber described in this embodiment includes the following steps:

[0064] S1: Pressurize the inner cavity of the outer cylinder 1 to the preset pressure through the pressure source; the pressurization process can be recorded and saved in stages according to research needs, specifically, the observation time is recorded for each time period after pressurization.

[0065] S2: Maintain the pressure in the inner cavity of the outer cylinder 1 to a preset duration, measure and monitor the temperature in the outer cylinder 1 through temperature sensor 91, measure the pressure parameters in the outer cylinder 1 through pressure sensor 92 and pressure gauge, measure the strain parameters of the simulated lining layer 3 and sealing layer through strain gauge 94, and measure the sealing performance of the simulated sealing layer 4 and simulated lining layer 3 through water leakage sensor 93.

[0066] S3: After the pressure holding work is completed, the pressure can be released in stages as required. By pre-setting different pressure release schemes, the deformation law and mechanical properties of the lining structure of the test model can be further studied.

[0067] S4: Depressurize the inner cavity of the outer cylinder 1, disassemble the test device, observe the morphology and crack distribution of the simulated lining layer 3 and the simulated sealing layer 4, and further study the mechanism of crack formation and expansion.

[0068] In summary, this invention provides a compressed air model testing device, system, and method for simulating a gas storage chamber. By sequentially setting a simulated sliding layer, a simulated lining layer, and a simulated sealing layer in the test cylinder, a structure similar to an actual gas storage chamber can be formed for pressure testing. Multiple inwardly convex deformation grooves (recesses) can be formed on the simulated sealing layer, and elastic deformation elements are set in the deformation grooves. When the simulated sealing layer is subjected to internal pressure, it expands radially and compresses the elastic deformation elements, allowing a portion of the deformation grooves to closely adhere to the simulated lining layer to compensate for the increased circumference of the simulated sealing layer after expansion. This allows the simulated sealing layer to undergo adaptive deformation while maintaining its sealing performance. When subjected to internal pressure, the simulated lining layer can expand radially synchronously with the simulated sealing layer and compress the simulated sliding layer. After the simulated lining layer expands under pressure, it may undergo plastic deformation such as cracking. The deformation parameters of the simulated lining layer can be monitored to study the failure mechanism and law of the lining. The pressure test can also test the deformation and sealing performance of the simulated sealing layer.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A compressed air model test device for simulating a gas storage chamber, characterized in that, The system includes an outer cylinder (1) and a simulated sliding layer (2), a simulated lining layer (3), and a simulated sealing layer (4) sequentially attached to the outer cylinder (1) from the outside to the inside. The simulated sealing layer (4) includes a sealing cylinder (41) with a plurality of deformation grooves (411) formed on it. The plurality of deformation grooves (411) are arranged circumferentially along the sealing cylinder (41). The deformation grooves (411) protrude radially inward along the sealing cylinder (41) and are located in the inner cavity of the simulated lining layer (3). The deformation grooves (411) are filled with elastic deformation members (43). The elastic deformation members (43) are located radially between the sealing cylinder (41) and the simulated lining layer (3). The sealing cylinder (41) can expand radially and compress the deformation grooves (411) and the elastic deformation members (43) when subjected to internal pressure. The simulated sealing layer (4) also includes two end plates (42), which are fixedly connected to both ends of the sealing cylinder (41). The two ends of the deformation groove (411) are respectively connected to the two end plates (42). The deformation groove (411) is also filled with a rigid filler (44), which abuts against the two end plates (42). The elastic deformation member (43) is located between the two rigid fillers (44) on both sides of the sealing cylinder (41) in the axial direction. The simulated lining layer (3) is embedded with reinforcing bars, and the reinforcing bars are provided with rollers that can contact the inner wall of the simulated sliding layer (2), and strain gauges (94) are attached to the reinforcing bars.

2. The compressed air model test device for simulating a gas storage chamber according to claim 1, characterized in that, Several pins (5) are evenly distributed on the side of the end plate (42) facing the simulated lining layer (3) and on the inner wall of the outer cylinder (1).

3. The compressed air model test device for simulating a gas storage chamber according to claim 1, characterized in that, The outer cylinder (1) is provided with a grouting channel (7) and an air hole (8).

4. The compressed air model test apparatus for simulating a gas storage chamber according to any one of claims 1 to 3, characterized in that, The bottom of the deformation groove (411) is provided with several fiber optic grating sensors.

5. The compressed air model test device for simulating a gas storage chamber according to claim 4, characterized in that, The fiber optic grating sensor includes a temperature sensor (91), a strain gauge (94), and a water leakage sensor (93).

6. A compressed air model test system for simulating a gas storage chamber, characterized in that, The device includes a pressure source, pipelines, and a compressed air model test apparatus for simulating a gas storage chamber as described in any one of claims 1 to 5, wherein the pressure source is connected to the inner cavity of the outer cylinder (1) through the pipelines.

7. The compressed air model test system for simulating a gas storage chamber according to claim 6, characterized in that, The pipeline is equipped with a pressure gauge and a pressure relief valve.

8. A method for testing a compressed air model simulating a gas storage chamber, characterized in that, The compressed air model test system for simulating a gas storage chamber as described in claim 6 or 7 includes: S1: Pressurize the inner cavity of the outer cylinder (1) to a preset pressure through the pressure source; S2: Maintain the pressure in the inner cavity of the outer cylinder (1) for a preset time, and monitor the temperature and pressure parameters in the outer cylinder (1) as well as the strain parameters of the simulated lining layer (3) and the sealing layer; S3: Depressurize the inner cavity of the outer cylinder (1).

Images