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

Abstract

The invention relates to the technical field of gas storage chamber simulation tests, in particular to a compressed air model test device, system and method for simulating a gas storage chamber, the test device comprises an outer cylinder, a simulation sliding layer, a simulation lining layer and a simulation sealing layer, and the simulation sliding layer, the simulation lining layer and the simulation sealing layer are sequentially attached to the outer cylinder from outside to inside; a plurality of deformation grooves are formed in the sealing cylinder, the deformation grooves are distributed in the annular direction of the sealing cylinder, the deformation grooves protrude inwards in the radial direction of the sealing cylinder and are located in an inner cavity of the simulation lining layer, the deformation grooves are filled with elastic deformation pieces, and the elastic deformation pieces are located between the sealing cylinder and the simulation lining layer in the radial direction; and the sealing cylinder can radially expand and compress the deformation groove and the elastic deformation piece when being subjected to internal pressure. The test device simulates to form a structure similar to a gas storage chamber to carry out a pressure test, deformation parameters of the simulated lining layer can be monitored to research the damage mechanism and rule of the lining, and the pressure test can also test the deformation and sealing performance of the simulated sealing layer.

Description

Technical Field

[0001] The present invention relates to the technical field of gas storage chamber simulation test, and in particular to a compressed air model test device, system and method for simulating a gas storage chamber. Background Art

[0002] Artificial gas storage chambers are flexible in site selection, have excellent durability and reasonable economy, so most of the compressed air energy storage projects currently under construction and planning adopt artificial gas storage chambers. Combined with the operation process of compressed air energy storage power stations, artificial gas storage chambers need to withstand 10-15Mpa high internal pressure, temperature and pressure coupling, and cyclic load changes. At the same time, under the action of internal pressure, the lining structure of the gas storage chamber and the surrounding rock of the chamber will be damaged to a certain extent. The safety and air tightness of artificial gas storage chambers have a significant impact on the operation safety and power storage efficiency of compressed air energy storage power stations; therefore, it is necessary to study the crack distribution and morphological distribution of the lining structure when the chamber expands and deforms under internal pressure, as well as the changes in the structural integrity and air tightness characteristics of the sealing structure under cracks and gas storage cavern operation conditions. However, there is currently a lack of an effective test device and method that can truly restore the chamber working conditions to study the changes of the above structural characteristics under pressure. Summary of the invention

[0003] The purpose of the present invention is to overcome the technical problem that the prior art cannot achieve true simulation of chamber working conditions to conduct crack and air tightness tests, and to provide a compressed air model test device, system and method for simulating an air storage chamber.

[0004] In a first aspect, the present invention provides a compressed air model test device for simulating an air storage chamber, comprising an outer cylinder body, and a simulated sliding layer, a simulated lining layer and a simulated sealing layer sequentially attached to the outer cylinder body from the outside to the inside, the simulated sealing layer comprising a sealing cylinder, a plurality of deformation grooves being formed on the sealing cylinder, the plurality of deformation grooves being arranged circumferentially of the sealing cylinder, the deformation grooves protruding radially inwardly along the sealing cylinder and being located in the inner cavity of the simulated lining layer, the deformation grooves being filled with elastic deformation parts, the elastic deformation parts being radially located between the sealing cylinder and the simulated lining layer; the sealing cylinder can radially expand and compress the deformation grooves and the elastic deformation parts when subjected to internal pressure.

[0005] By sequentially arranging 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. A plurality of inwardly convex deformation grooves (grooves) structures can be formed on the simulated sealing layer, and elastic deformation parts can be arranged in the deformation grooves so that the simulated sealing layer can expand radially when subjected to internal pressure, and the elastic deformation parts can be compressed. A portion of the deformation grooves can be closely attached to the simulated lining layer to compensate for the incremental size of the circumference of the simulated sealing layer after expansion, so that the simulated sealing layer undergoes adaptive deformation while maintaining sealing performance. The simulated lining layer can radially expand synchronously with the simulated sealing layer when subjected to internal pressure, and compress the simulated sliding layer. Plastic deformations such as cracking may occur after the simulated lining layer is compressed and expanded. 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 also includes two end plates, the two end plates are fixedly connected to the two ends of the sealing tube, the two ends of the deformation groove are respectively connected to the two end plates, the deformation groove is also filled with rigid filling pieces, the rigid filling pieces are respectively abutted against the two end plates, and the elastic deformation piece is located between the rigid filling pieces on both sides in the axial direction of the sealing tube.

[0007] A rigid filling piece may be arranged in the deformation groove near the end plate to prevent the deformation groove from being deformed at the end plate when under pressure, causing disconnection between the deformation groove and the end plate, thereby preventing the sealing from failing. The rigid filling piece may ensure that the deformation groove and the end plate remain relatively fixed. Here, the rigid filling piece may be concrete, steel or other rigid materials.

[0008] Preferably, a plurality of pins are evenly arranged 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 buried in the simulated lining layer, so as to anchor the end plate and the simulated lining to avoid relative displacement between the end plate and the lining when under pressure, causing instability.

[0010] Preferably, steel bars are embedded in the simulated lining layer, rollers capable of contacting the inner wall of the simulated sliding layer are provided on the steel bars, and strain gauges are attached to the steel bars.

[0011] The steel bars are arranged in the simulated lining layer to simulate the lining structure of the actual chamber, and the simulated lining layer can restore the tensile strength of the actual chamber lining. The rollers are arranged on the steel bars to facilitate the installation of the steel bars in the outer cylinder. The steel bars can be tied to form a steel cage structure, and the rollers are used to push the steel bars into the outer cylinder axially, and the simulated sealing layer is installed in place. After the parameter monitoring equipment is installed and the head of the outer cylinder is installed, concrete can be poured into the outer cylinder to form a simulated lining layer structure. The strain gauges arranged on the steel bars can monitor the strain parameters of the simulated lining layer in real time during the test.

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

[0013] Concrete can be poured through the grouting channel arranged on the outer cylinder to form a simulated lining layer, and the air holes can play a role in exhausting air during pouring.

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

[0015] Placing fiber grating sensors in the deformation groove can monitor various parameters of the simulated sealing layer in real time during the experiment.

[0016] Preferably, the fiber 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 can measure temperature, deformation and sealing performance parameters accordingly.

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

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

[0020] Preferably, a pressure gauge and a pressure relief valve are provided on the pipeline.

[0021] A pressure gauge can be set to measure the pressure in the test device. After the test is completed or the pressure exceeds the preset pressure of the test, the pressure relief valve can be opened to reduce the pressure.

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

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention provides a compressed air model test device, system and method for simulating an air storage chamber. By sequentially arranging a simulated sliding layer, a simulated lining layer and a simulated sealing layer in a test cylinder, a structure similar to an actual air storage chamber can be formed to perform a pressure test. A plurality of inwardly convex deformation groove (groove) structures can be formed on the simulated sealing layer, and elastic deformation parts can be arranged in the deformation grooves to radially expand and compress the elastic deformation parts when the simulated sealing layer is subjected to internal pressure. A portion of the deformation grooves can be closely attached to the simulated lining layer to compensate for the incremental size of the circumference of the simulated sealing layer after expansion, so that the simulated sealing layer undergoes adaptive deformation while maintaining sealing performance. The simulated lining layer can radially expand synchronously with the simulated sealing layer when subjected to internal pressure, and compress the simulated sliding layer. Plastic deformations such as cracking may occur in the simulated lining layer after expansion under pressure. 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a compressed air model test device for simulating an air storage chamber of the present invention.

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

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

[0028] Figure 4 Schematic diagram of the layout of sensors in the annular direction of the simulated sealing layer.

[0029] Figure 5 This is a schematic diagram of the layout of reinforcement monitoring points in the simulated lining layer.

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

[0031] Markings in the figure:

[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 part, 44. Rigid filling part, 5. Pin, 6. Pressure channel, 61. Pressure relief channel, 7. Grouting channel, 8. Air hole, 91. Temperature sensor, 92. Pressure sensor, 93. Water leakage sensor, 94. Strain gauge, 95. Fiber Bragg grating sensor line, 96. Concrete strain gauge, 10. Steel bar. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0034] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0035] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0036] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0037] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0038] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0039] Example 1

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

[0041] Figure 1 It is a structural schematic diagram of a compressed air model test device for simulating an air storage chamber of the present invention; Figure 2 A cross-sectional view of a compressed air model test device for simulating an air storage chamber of the present invention; Figure 3 It is a radial cross-sectional view of the compressed air model test device for simulating an air storage chamber of the present invention outside the simulated sealing layer; Figure 4 A schematic diagram of the arrangement of sensors in the annular direction of the simulated sealing layer; Figure 5 This is a schematic diagram of the layout of the steel bar monitoring points for the simulated lining layer; Figure 6 This is a schematic diagram of the layout of monitoring points for simulated lining layer concrete.

[0042] like Figures 1 to 6As shown in , the compressed air model test device of the simulated air 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, and two opposite deformation grooves 411 are formed on the sealing cylinder 41, the deformation grooves 411 protrude radially inwardly 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 parts 43, and the elastic deformation parts 43 are radially located between the sealing cylinder 41 and the simulated lining layer 3; the sealing cylinder 41 can radially expand and compress the deformation grooves 411 and the elastic deformation parts 43 when subjected to internal pressure; here, the number of deformation grooves 411 can also be one or more, and multiple deformation grooves 411 can be arranged circumferentially along the sealing cylinder 41, and the elastic deformation parts 43 can be rubber blocks matching the deformation grooves 411, or other elastic materials, and the present invention does not specifically limit the number of deformation grooves 411 on the simulated sealing layer 4 and the material of the elastic deformation parts 43.

[0043] By sequentially arranging a simulated sliding layer 2, a simulated lining layer 3 and a simulated sealing layer 4 in the test cylinder, a structure similar to an actual gas storage chamber can be formed for pressure testing. A plurality of inwardly convex deformation grooves 411 (groove) structures can be formed on the simulated sealing layer 4, and an elastic deformation member 43 is arranged in the deformation groove 411 so that the simulated sealing layer 4 can expand radially when the simulated sealing layer 4 is subjected to internal pressure, and the elastic deformation member 43 can be compressed. A portion of the deformation groove 411 can be closely attached to the simulated lining layer 3 to compensate for the incremental size of the circumference of the simulated sealing layer 4 after expansion, so that the simulated sealing layer 4 undergoes adaptive deformation while maintaining the sealing performance. The simulated lining layer 3 can radially expand synchronously with the simulated sealing layer 4 when subjected to internal pressure, and compress the simulated sliding layer 2. Plastic deformations such as cracking may occur after the simulated lining layer 3 is compressed and expanded. 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] A pressure channel 6 may be provided on the outer cylinder 1, and the pressure channel 6 may pass through 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 may be pressurized in the inner cavity of the outer cylinder 1 along the pressure channel 6 to perform a pressure test; after the test, the high-pressure gas in the inner cavity of the outer cylinder 1 may also be discharged from the outer cylinder 1 along the pressure channel 6 to release the pressure. Of course, an additional exhaust channel that passes through the inner cavity may also be provided on the outer cylinder 1, and the exhaust process may be carried out through the exhaust channel.

[0045] In this embodiment, the simulated sealing layer 4 also includes two end plates 42, which are fixedly connected to the two ends of the sealing tube 41, and 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 filling piece 44, and the rigid filling piece 44 is respectively abutted against the two end plates 42. The elastic deformation piece 43 is located between the rigid filling pieces 44 on both sides in the axial direction of the sealing tube 41.

[0046] The rigid filling piece 44 can be arranged in the deformation groove 411 near the end plate 42 to prevent the deformation groove 411 from being deformed at the end plate 42 when under pressure, causing the connection between the deformation groove 411 and the end plate 42 to be disconnected, thereby causing sealing failure; the rigid filling piece 44 can ensure that the deformation groove 411 and the end plate 42 remain relatively fixed; here, the rigid filling piece 44 can be concrete, steel or other rigid materials.

[0047] In this embodiment, a plurality of pins 5 are evenly arranged on the side of the end plate 42 facing the simulated lining layer 3 and 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 buried in the simulated lining layer 3, so that the end plate 42 and the simulated lining can be anchored to avoid relative displacement between the end plate 42 and the lining when under pressure, causing instability. Specifically, the pins 5 arranged 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 bars are arranged in the simulated lining layer 3 between the simulated sealing layer 4 and the end cap of the outer cylinder 1, the pins 5 are required to fix the end plate 42 and the outer cylinder 1.

[0048] In this embodiment, steel bars 10 are embedded in the simulated lining layer 3, rollers (not shown in the figure) that can contact the inner wall of the simulated sliding layer 2 are provided on the annular steel bars, and strain gauges 94 are attached to the steel bars 10. The provision of steel bars 10 in the simulated lining layer 3 can simulate the lining structure of the actual chamber, and the simulated lining layer 3 can restore the tensile strength of the actual chamber lining. The provision of rollers on the annular steel bars can facilitate the installation of the steel bars in the outer cylinder 1. The annular steel bars and the longitudinal steel bars can be tied to form a steel cage structure, and the rollers can be used to push the outer cylinder 1 axially, and the simulated sealing layer 4 is installed in place. After the parameter monitoring equipment is installed and the head of the outer cylinder 1 is installed, concrete can be poured into the outer cylinder 1 to form a simulated lining layer 3 structure. The provision of strain gauges 94 on the annular steel bars can monitor the strain parameters of the simulated lining layer 3 in real time during the test. Figure 6 As shown in , concrete strain gauges 96 are also buried at multiple locations in the concrete of the simulated lining layer 3 to monitor the deformation of the concrete under pressure. Both ends of the concrete strain gauge 96 can be fixed on the steel bar 10.

[0049] Optionally, a grouting channel 7 and air holes 8 are provided on the outer cylinder 1. Concrete can be poured through the grouting channel 7 provided on the outer cylinder 1 to form the simulated lining layer 3, and the air holes 8 can play a role in exhausting air during pouring.

[0050] Multiple groups of circumferential fiber Bragg grating sensors are arranged inside the sealing steel lining 4, and multiple groups of circumferential resistive sensors are arranged outside the sealing steel lining 4. The fiber Bragg grating sensors arranged inside the sealing steel lining 4 and the resistive sensors arranged outside can monitor various parameters of the simulated sealing layer 4 in real time during the test.

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

[0052] Specifically, a layout method of the fiber grating sensor in the circumferential direction of the simulated sealing layer 4 can be as follows: Figure 4 As shown in , the arcuate portion of the bottom of the deformation groove 411 is provided with a strain gauge 94 (i.e., a strain sensor), and the arcuate portion formed at the connection between the deformation groove 411 and the simulated sealing layer 4 on both sides is also provided with a plurality of strain gauges 94. Here, the arcuate portion of the bottom of the deformation groove 411 and the arcuate portion formed at the connection between the deformation groove 411 and the simulated sealing layer 4 on both sides are both main deformation areas, i.e., stress concentration sites during deformation. In addition, strain gauges 94 and temperature sensors 91 are also provided on the simulated sealing layer 4 between the deformation grooves 411 on both sides; the sensors on the same annular direction can be connected through a fiber optic Bragg grating sensing line 95, that is, the fiber optic Bragg grating sensing line 95 can be wrapped inside the simulated sealing layer 4, and a plurality of annularly arranged fiber optic Bragg grating sensing lines 95 can be provided in the axial direction of the simulated sealing layer 4, and the arrangement of the sensors on each ring can be the same or different. For example, in and Figure 4 In another annular direction axially adjacent to the annular direction shown in the figure, a water leakage sensor 93 can be set at the arc portion of the bottom of the deformation groove 411 to monitor water leakage; the arrangement method of the sensors on each annular direction can be selected according to actual test needs, and the present invention does not make specific limitations on this.

[0053] An axial fiber Bragg grating sensing line (not shown in the figure) can also be connected between each adjacent circumferential fiber Bragg grating sensing line 95 in the axial direction of the simulated sealing layer 4. The axial fiber Bragg grating sensing line can connect each axial sensor and pass through the inside of the sealing steel liner 4 through the provided sealing device to ensure the airtightness of the sealing steel liner 4.

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

[0055] Example 2

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

[0057] The compressed air model test system for simulating an air storage chamber described in this embodiment may include a pressure source, a pipeline, and the compressed air model test device for simulating an air storage chamber as described above. The pressure source is connected to the inner cavity of the outer cylinder 1 through the pipeline; 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 pipeline for testing. Here, the pressure source can be a pressure device such as an air compressor.

[0058] Optionally, components such as a pressure gauge and a pressure relief valve may be provided on the pipeline. The pressure gauge may be provided to measure the pressure in the test device, and the pressure relief valve may be opened to reduce the pressure after the test is completed or the pressure exceeds the preset test pressure. Of course, a pressure relief channel 61 may also be provided separately in the test device, and the pressure relief channel 61 may pass through the outer cylinder 1, the simulated sliding layer 2, the simulated lining layer 3 and the simulated sealing layer 4 to communicate with the inner cavity of the simulated sealing layer 4, that is, the pressure channel 6 and the pressure relief channel 61 are used to perform pressurization and pressure relief operations respectively.

[0059] It should be noted that the compressed air model test device for simulating an air storage chamber described in this embodiment is consistent with the compressed air model test device for simulating an air storage chamber described in Example 1, and this embodiment will not be further described in detail.

[0060] Example 3

[0061] This embodiment provides a compressed air model test method for simulating an air storage chamber.

[0062] The compressed air model test method for simulating an air storage chamber described in this embodiment adopts the compressed air model test system for simulating an air storage chamber described in Example 2.

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

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

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

[0066] S3: After the pressure maintenance work is completed, the pressure can be released in stages according to requirements. By presetting different pressure release schemes, the deformation law and mechanical properties of the lining structure of the test model can be further studied.

[0067] S4: Release the pressure from 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, the present invention provides a compressed air model test device, system and method for simulating an air storage chamber. By sequentially arranging a simulated sliding layer, a simulated lining layer and a simulated sealing layer in a test cylinder, a structure similar to an actual air storage chamber can be formed to carry out a pressure test. A plurality of inwardly convex deformation grooves (groove) structures can be formed on the simulated sealing layer, and an elastic deformation member is arranged in the deformation groove so that the simulated sealing layer can expand radially when the simulated sealing layer is subjected to internal pressure, and the elastic deformation member is compressed. A portion of the deformation groove can be closely attached to the simulated lining layer to compensate for the incremental size of the circumference of the simulated sealing layer after expansion, so that the simulated sealing layer undergoes adaptive deformation while maintaining the sealing performance. The simulated lining layer can radially expand synchronously with the simulated sealing layer when subjected to internal pressure, and compress the simulated sliding layer. The simulated lining layer may undergo plastic deformation such as cracking after being compressed and expanded. 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 in the protection scope of the present invention.

Claims

1. A compressed air model test device for simulating an air storage chamber, characterized in that: The invention comprises an outer cylinder (1), and a simulated sliding layer (2), a simulated lining layer (3) and a simulated sealing layer (4) which are sequentially attached to the outer cylinder (1) from the outside to the inside, wherein the simulated sealing layer (4) comprises a sealing cylinder (41), a plurality of deformation grooves (411) are formed on the sealing cylinder (41), the plurality of deformation grooves (411) are arranged along the circumferential direction of the sealing cylinder (41), the deformation grooves (411) protrude radially inwardly along the radial direction of 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 parts (43), and the elastic deformation parts (43) are radially located between the sealing cylinder (41) and the simulated lining layer (3); the sealing cylinder (41) can radially expand and compress the deformation grooves (411) and the elastic deformation parts (43) when subjected to internal pressure.

2. The compressed air model test device for simulating an air storage chamber according to claim 1, characterized in that: The simulated sealing layer (4) further comprises two end plates (42), wherein the two end plates (42) are fixedly connected to the two ends of the sealing tube (41), and 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 filling piece (44), and the rigid filling piece (44) is respectively abutted against the two end plates (42). The elastic deformation piece (43) is located between the rigid filling pieces (44) on both sides in the axial direction of the sealing tube (41).

3. The compressed air model test device for simulating an air storage chamber according to claim 2, characterized in that: A plurality of 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).

4. The compressed air model test device for simulating an air storage chamber according to claim 1, characterized in that: A steel bar is embedded in the simulated lining layer (3), a roller capable of contacting the inner wall of the simulated sliding layer (2) is provided on the steel bar, and a strain gauge (94) is attached to the steel bar.

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

6. The compressed air model test device for simulating an air storage chamber according to any one of claims 1 to 5, characterized in that: The bottom of the deformation groove (411) is provided with a plurality of fiber grating sensors.

7. The compressed air model test device for simulating an air storage chamber according to claim 6, characterized in that: The fiber grating sensor comprises a temperature sensor (91), a strain gauge (94) and a water leakage sensor (93).

8. A compressed air model test system for simulating an air storage chamber, characterized in that: A compressed air model test device comprising a pressure source, a pipeline and a simulated air storage chamber as claimed in any one of claims 1 to 7, wherein the pressure source is connected to the inner cavity of the outer cylinder (1) through the pipeline.

9. The compressed air model test system for simulating an air storage chamber according to claim 8, characterized in that: The pipeline is provided with a pressure gauge and a pressure relief valve.

10. A compressed air model test method for simulating an air storage chamber, characterized in that: A compressed air model test system for simulating an air storage chamber according to claim 8 or 9, comprising: S1: Pressurizing the inner cavity of the outer cylinder (1) to a preset pressure through the pressure source; S2: maintaining the pressure of the inner cavity of the outer cylinder (1) for a preset time, and monitoring the temperature and pressure parameters in the outer cylinder (1) and the strain parameters of the simulated lining layer (3) and the sealing layer; S3: Relieve the pressure in the inner cavity of the outer cylinder (1).

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