A telescopic air-water isolation equipment indoor test device and test method

Abstract

The application provides a telescopic gas-water isolation equipment indoor test device and test method, relates to the field of energy storage component testing, and aims at the problem that it is difficult to perform gas-water coupling dynamic environment simulation test on the gas-water isolation equipment at present. Through parallel arrangement of upper water pipelines and lower water pipelines with independent control valves and flow sensors between the low-position water tank and the high-position water tank, and in combination with the displacement sensor arranged on the outer wall of the low-position water tank, the gas pressure regulating expansion and the linear elongation of the gas-water isolation equipment to the directional flow process of the water body are realized, the gas-water coupling dynamic environment is simulated, the accuracy of the measured data is improved, the volume change amount of the gas-water isolation equipment in the closed water area can be accurately measured through the external displacement sensor, and cross verification with the fluid volume of the upper water pipeline and the lower water pipeline is performed in real time, so that the authenticity of the parameter collection of the compressed air driving water body working process and the accuracy of the data mapping are improved.

Description

Technical Field

[0001] This invention relates to the field of energy storage component testing, specifically to an indoor testing device and method for a telescopic air-water isolation device. Background Technology

[0002] In research on long-term energy storage systems coupled with compressed air and water, existing indoor testing equipment mostly relies on a single pressure-bearing airbag for material pressure resistance testing. Structurally, current technologies typically only equip the airbag under test with a single-pipe water supply system or a conventional water pump water inlet circuit, enclosing it within a single sealed container. In terms of operation and control logic, the testing process is mostly a simple constant-pressure inflation or constant-flow water injection, with the internal pressure of the container monitored by a single pressure sensor.

[0003] Because existing technologies employ a single-pipe, constant-volume or constant-pressure testing layout, when simulating real energy storage conditions—where water at a lower level rises under pressure to a higher storage space—they become disconnected from the dynamic work done by the fluid. The single-pipe structure cannot establish gravitational potential energy boundary conditions with actual elevation differences, resulting in an inability to accurately reflect the network resistance and head loss during water transport. Consequently, the assessment of the drainage capacity of the air-water isolation components in overcoming water pressure is distorted. Summary of the Invention

[0004] The purpose of this invention is to address the deficiencies in the existing technology by providing an indoor testing device and method for a telescopic air-water isolation device, thereby solving the problem of evaluation distortion caused by the lack of a dynamic simulation environment for air-water coupling during testing of air-water isolation devices in the existing technology.

[0005] The first objective of this invention is to provide an indoor testing device for a telescopic air-water isolation equipment, which adopts the following solution: include: High-level water tank; The low-level water tank, located below the high-level water tank, is used to contain the air-water isolation device to be tested. It is connected to the high-level water tank through water inlet and water outlet pipes. Control valves and flow sensors are installed on both the water inlet and water outlet pipes. A displacement sensor is installed on the outer wall of the low-level water tank to measure the expansion and contraction of the air-water isolation device inside the low-level water tank. The pressure regulating component includes an air storage tank, which is connected to the air-water isolation device after passing through the side wall of the low-level water tank via a pressure regulating pipe. The pressure regulating pipe is equipped with an air inlet valve and an exhaust branch with an exhaust valve. The pressure regulating component controls the volume change of the air-water isolation device within the low-level water tank.

[0006] Furthermore, the pressure regulating assembly also includes an air pump connected to the air storage tank. A pressure sensor and a pressure regulating valve are provided on the section of the pressure regulating pipe outside the low-level water tank. Along the axial direction of the pressure regulating pipe, the pressure regulating valve, the air inlet valve, the exhaust branch and the pressure sensor are arranged in sequence.

[0007] Furthermore, the air pump, pressure sensor, displacement sensor, and flow sensor are respectively connected to the controller.

[0008] Furthermore, a placement area for the air-water isolation device is formed in the low-level water tank between the pressure regulating pipe and the displacement sensor, and the detection area of ​​the displacement sensor covers the extension and retraction path of the air-water isolation device.

[0009] Furthermore, the displacement sensor is equipped with a follower fixed to the telescopic end of the air-water isolation device. The displacement sensor measures the displacement of the follower relative to the displacement sensor and sends it to the controller.

[0010] Furthermore, water level sensors are installed in both the high-level water tank and the low-level water tank, and the water level sensors are connected to the controller.

[0011] Furthermore, one end of the exhaust branch is connected to a pressure regulating pipe, and the other end is open and connected to the atmospheric environment.

[0012] A second objective of this invention is to provide a test method for an indoor test apparatus for a telescopic air-water isolation device, utilizing the indoor test apparatus for a telescopic air-water isolation device as provided in the first objective, comprising: During the water filling test, the air inlet valve and the control valve on the water supply pipeline are opened, while the exhaust valve and the control valve on the drain pipeline are closed. The gas in the air storage tank enters the air-water isolation device under test through the pressure regulating pipe, causing the air-water isolation device to occupy a larger volume in the low-level water tank, which in turn squeezes the water in the low-level water tank into the high-level water tank through the water supply pipeline. During this process, the water flow rate is obtained through the flow sensor on the water supply pipeline, and the elongation of the air-water isolation device is measured through the displacement sensor. During the venting test, the air inlet valve and the control valve on the water supply line are closed, while the venting valve and the control valve on the drain line are opened. Water in the high-level water tank flows into the low-level water tank through the drain line, compressing the air-water isolation device and reducing its volume in the low-level water tank. The gas inside the air-water isolation device is discharged through the venting branch. During this process, the drain flow rate is obtained through the flow sensor on the drain line, and the contraction of the air-water isolation device is measured through the displacement sensor.

[0013] Furthermore, after the water filling test is completed and before the water draining and venting test is performed, the air inlet valve, air outlet valve, and all control valves on the water filling and draining pipelines are closed, and the expansion and contraction of the air-water isolation device under pressure is monitored by a displacement sensor.

[0014] Furthermore, the water filling test and water draining test steps are performed alternately and repeatedly to measure the expansion and contraction and flow rate data of the air-water isolation device under multiple volume change cycles.

[0015] Compared with the prior art, the advantages and positive effects of this invention are: To address the current challenge of simulating dynamic environmental conditions involving air-water coupling in air-water isolation equipment, this paper proposes a method that simulates the dynamic environment of air-water coupling by installing parallel water inlet and outlet pipes with independent control valves and flow sensors between a low-level water tank and a high-level water tank. This is achieved by combining these pipes with displacement sensors placed on the outer wall of the low-level water tank. The simulation includes gas pressure regulation and expansion, linear elongation of the air-water isolation equipment, and directional flow of water. This improves the accuracy of the measured data. Furthermore, the volume change of the air-water isolation equipment within a confined water area can be precisely measured using external displacement sensors and cross-validated in real-time with the fluid volumes in the inlet and outlet pipes. This enhances the realism of parameter acquisition and the accuracy of data mapping during the compressed air-driven water-body operation process. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] Figure 1 This is a schematic diagram of the overall structure of the indoor test device for the telescopic air-water isolation equipment in one or more embodiments of the present invention.

[0018] The components include: 1. High-level water tank; 2. Low-level water tank; 3. Air-water isolation equipment; 4. Water supply pipeline; 5. Water discharge pipeline; 6. Control valve; 7. Flow sensor; 8. Displacement sensor; 9. Pressure regulating assembly; 10. Air storage tank; 11. Pressure regulating pipe; 12. Air inlet valve; 13. Exhaust branch; 14. Exhaust valve; 15. Air pump; 16. Pressure sensor; 17. Pressure regulating valve; 18. Controller; 19. Water level sensor; 20. Follower. Detailed Implementation

[0019] Example 1 In a typical embodiment of the present invention, such as Figure 1 As shown, an indoor test device for a telescopic air-water isolation equipment is presented.

[0020] Coupled compressed air energy storage with pumped hydro storage, utilizing compressed air to drive the water body at a lower elevation to rise and convert it into gravitational potential energy, is one energy storage implementation path. In such systems, the pressure transmission characteristics, volumetric deformation patterns, and cyclic fatigue performance of the air-water isolation device 3 directly affect the overall energy conversion indicators of the system. Based on this, this embodiment proposes a telescopic air-water isolation device indoor test apparatus, adapted for indoor scaled-down testing and verification of energy storage parameters. By distributing control valves 6, flow sensors 7, and displacement sensors 8, a mapping relationship between air pressure, component displacement, and fluid flow rate is established, solving the problem that single-parameter testing in existing technologies is insufficient to characterize the fluid dynamics of air-water coupling, and providing test data for parameter selection and control strategy evaluation.

[0021] In this embodiment, the indoor test device for the telescopic air-water isolation equipment includes a high-level water tank 1 and a low-level water tank 2, with the high-level water tank 1 positioned directly above or diagonally above the low-level water tank 2. Through this spatial arrangement of height difference, an initial gravitational potential energy difference is established between the static fluids in the high-level water tank 1 and the low-level water tank 2, providing the hydrostatic pressure boundary conditions reflecting the actual working conditions of pumped-storage engineering projects. The low-level water tank 2 forms a sealed working cavity, and the air-water isolation equipment 3 to be tested is housed inside the low-level water tank 2, directly contacting the water environment within it.

[0022] The low-level water tank 2 and the high-level water tank 1 are connected by independently installed inlet water pipe 4 and outlet water pipe 5, respectively. A control valve 6 and a flow sensor 7 are connected in series along the fluid direction on the inlet water pipe 4, and are respectively connected to a controller 18 for control and data acquisition. Similarly, an independent control valve 6 and flow sensor 7 are also connected in series on the outlet water pipe 5, and are respectively connected to the controller 18 for control and data acquisition. This dual-path separation structure ensures that the process of water rising due to work is independent of the process of water flowing back due to gravity. The dual-path separation structure reduces network backflow interference and local turbulence dead zones caused by fluid switching back and forth in a single pipe, and improves the stability of the volumetric flow rate data measured by the two sets of flow sensors 7 under bidirectional operating conditions.

[0023] Specifically, such as Figure 1As shown, the inlet end of the water supply pipeline 4 is connected to the low-level water tank 2, and the outlet end is connected to the high-level water tank 1. Along the upward fluid transport direction, a water supply control valve 6 and a water supply flow sensor 7 are connected in series on the pipeline section. After receiving the conduction command from the controller 18, the water supply control valve 6 opens the fluid channel, and the detection probe of the water supply flow sensor 7 is located in the straight pipe section with unidirectional flow to obtain the fluid velocity signal. By setting the water supply control valve 6 and the water supply flow sensor 7 in series, the opening and closing action of the transport channel can be performed under high pressure, and the water supply flow data when the air-water isolation device 3 expands and displaces water can be obtained in the independently rising unidirectional flow channel, reducing the signal interference of fluid eddies caused by the instantaneous opening and closing of the pipeline valves on the flow measurement.

[0024] The inlet of the drainage pipe 5 is connected to the high-level water tank 1, and the outlet is connected to the low-level water tank 2. Along the downward direction of fluid gravity backflow, a drainage control valve 6 and a drainage flow sensor 7 are connected in series on the pipe section. The drainage control valve 6 opens and closes according to control commands, or its opening is adjusted to change the local interception area. The drainage flow sensor 7 detects the fluid volume velocity in the independent downward backflow section. The drainage control valve 6, in the closed state, blocks the unexpected release of the system's gravitational potential energy. In the open state, it works with the drainage flow sensor 7 to obtain drainage flow data when the gravity backflow of water from the high-level water tank impacts the low-level water tank 2. This provides a calculation basis for evaluating the fluid-structure interaction resistance parameters during the contraction process of the water backflow squeezing the air-water isolation component.

[0025] like Figure 1 As shown, a displacement sensor 8 is fixedly installed on the outer wall surface of the low-level water tank 2. The detection end of the displacement sensor 8 faces the inside of the low-level water tank 2, and the space inside the low-level water tank 2 between the end of the pressure regulating pipe 11 and the displacement sensor 8 constitutes the placement area of ​​the air-water isolation device 3. The displacement sensor 8 can be embedded in the outer wall of the low-level water tank 2, so that its detection element can contact the water in the low-level water tank 2 to achieve detection. It can be understood that in this embodiment, the displacement sensor 8 can also be attached to the outer wall of the low-level water tank 2. The detection beam or magnetic coupling signal of the displacement sensor 8 can cross the outer wall of the low-level water tank 2 to detect the air-water isolation device 3 to be tested inside. The external installation layout avoids the electronic sensor from being directly immersed in the water environment, reducing the probability of seal damage and electrical short circuit. At the same time, it can quantify the amount of axial extension and retraction displacement of the air-water isolation device 3 inside the low-level water tank 2.

[0026] It should be noted that the telescopic gas-water isolation device 3 in this embodiment serves as the pressure transmission medium in the gas-liquid coupling energy storage system. Its main structure includes a fixed end, a variable-volume tube, and a follower movable end. The fixed end is used to connect to an external gas source pipeline to establish a gas inlet and outlet channel. The variable-volume tube is arranged inside the pressurized water environment, and the follower movable end is located on the telescopic side surface of the tube to directly contact the external fluid medium. When high-pressure gas is introduced into the gas chamber inside the gas-water isolation device 3, the variable-volume tube is driven by the internal pressure to elongate along the main axis, and the follower movable end moves outward to displace the surrounding water. Conversely, when the external static water pressure is higher than the internal closed gas pressure, the tube is squeezed by the water flow and its volume contracts, thereby venting the internal gas outward. By adopting a gas-water isolation and telescopic structure, the gas-water isolation device 3 can provide space for volume change while preventing direct dissolution or gas-liquid mixing between air and water, thereby realizing the bidirectional conversion between the pressure potential energy of compressed gas and the mechanical energy of water flow.

[0027] The displacement sensor 8 is paired with a follower 20 fixed to the telescopic end of the air-water isolation device 3. The follower 20, as a geometrically regular rigid target, is fixed to the moving end of the air-water isolation device 3. The detection area of ​​the displacement sensor 8 covers the entire telescopic path of the follower 20. When the air-water isolation device 3 expands in volume, the displacement sensor 8 detects the follower 20 and its installed moving end, rather than directly detecting the flexible surface of the device, which is prone to radial deformation. This avoids geometric scattering interference from local irregular wrinkles or radial expansion on the surface of the air-water isolation device 3 on the ranging signal, increasing the accuracy of the axial displacement data extraction.

[0028] To enable the input and control of gas inside the gas-water isolation device 3, a pressure regulating component 9 is configured in this embodiment. The pressure regulating component 9 includes an air pump 15, an air storage tank 10, and a matching gas delivery pipeline network. The output end of the air storage tank 10 is connected to a pressure regulating pipe 11. After passing through the side wall boundary of the low-level water tank 2, the pressure regulating pipe 11 is connected to the internal gas-water isolation device 3. The penetration point between the pressure regulating pipe 11 and the side wall of the water tank is watertightly connected using fasteners and sealing rings.

[0029] A pressure regulating pipe 11 is connected to an exhaust branch 13 on a section outside the low-level water tank 2. An exhaust valve 14 is installed on the exhaust branch 13. One end of the exhaust branch 13 is connected to the pressure regulating pipe 11, while the other end remains open and connected to the atmosphere. This allows the internal air chamber of the air-water isolation device 3 to have independent control channels for inflation and depressurization, thereby enabling pressure regulation and controlling the deformation of the air-water isolation device 3 to change the fluid volume it occupies inside the low-level water tank 2. This open structure with direct atmospheric discharge reduces the back pressure along the pipeline during the exhaust phase, providing a test environment for evaluating the resistance characteristics of the isolation component's own contractile elasticity.

[0030] like Figure 1 As shown, along the axial direction of the pressure regulating pipe 11, a pressure regulating valve 17, an inlet valve 12, an exhaust branch 13, and a pressure sensor 16 are arranged sequentially. The pressure regulating valve 17 smooths out high-frequency pressure fluctuations at the source end; the inlet valve 12, located downstream, executes the fluid cut-off or conduction command; the exhaust branch 13 is located downstream of the inlet valve 12, allowing pressurized gas in the downstream pipeline and inside the isolation equipment to be independently discharged through the exhaust branch 13 when the inlet valve 12 is closed; the pressure sensor 16 is located downstream of the exhaust branch 13, near the end of the pipeline close to the side wall of the low-level water tank 2, reducing the pressure drop interference caused by the frictional resistance between the front-end throttling valve and the long pipeline, making the data measured by the pressure sensor 16 closer to the actual pressure inside the gas-water isolation equipment 3.

[0031] Water level sensors 19 are installed in both the high-level water tank 1 and the low-level water tank 2. The water level sensors 19 are fixed to the inner wall of the tanks and are used to obtain the absolute height change of the liquid level. In this embodiment, both the high-level water tank 1 and the low-level water tank 2 are water tank containers with regular geometric cross-sections. The rise and fall of the water level is proportional to the change in fluid volume, facilitating the acquisition of water volume changes in the high-level water tank 1 and the low-level water tank 2.

[0032] The device also includes a controller 18, an air pump 15, a pressure sensor 16, a displacement sensor 8, flow sensors 7 on the water inlet pipe 4 and the water outlet pipe 5, and water level sensors 19 in the two water tanks. All of these are connected to the controller 18 via electrical communication lines. The pressure sensor 16 measures the transient air pressure data at the air inlet of the air-water isolation device 3 and converts it into an electrical signal, which is then sent to the controller 18. The displacement sensor 8 measures the axial expansion and contraction data of the follower 20 and sends it to the controller 18. The flow sensors 7 on the water inlet pipe 4 and the water outlet pipe 5 measure the fluid volumetric velocity data in the water inlet pipe 4 and the water outlet pipe 5, respectively, and send it to the controller 18. The water level sensors 19 in the two water tanks measure the absolute height data of the liquid level in the high-level water tank 1 and the low-level water tank 2, respectively, and send it to the controller 18. By unifying the distributed actuators and multi-dimensional sensors into the controller 18, the time synchronization module within the controller 18 correlates the airflow status, water flow, equipment displacement, and water tank level on the same data sampling time axis. This reduces the data misalignment rate caused by differences in sampling clocks between different acquisition instruments, providing a time-consistent data source for subsequent analysis of pressure transmission hysteresis.

[0033] Example 2 In another typical embodiment of the present invention, such as Figure 1 As shown, a test method for an indoor test apparatus for a telescopic air-water isolation device is provided, utilizing the indoor test apparatus for a telescopic air-water isolation device as described in Example 1, including: During the water filling test, the air inlet valve 12 and the control valve 6 on the water supply pipeline 4 are opened, and the exhaust valve 14 and the control valve 6 on the water supply pipeline 5 are closed. The gas in the air storage tank 10 enters the air-water isolation device 3 to be tested through the pressure regulating pipe 11, which controls the air-water isolation device 3 to occupy a larger volume in the low-level water tank 2, squeezing the water in the low-level water tank 2 into the high-level water tank 1 through the water supply pipeline 4. During this process, the water flow rate is obtained through the flow sensor 7 on the water supply pipeline 4, and the elongation of the air-water isolation device 3 is measured through the displacement sensor 8. During the venting test, the air inlet valve 12 and the control valve 6 on the water supply pipe 4 are closed, and the vent valve 14 and the control valve 6 on the drain pipe 5 are opened. The water in the high-level water tank 1 flows into the low-level water tank 2 through the drain pipe 5, squeezing the air-water isolation device 3 to reduce its volume in the low-level water tank 2. The gas in the air-water isolation device 3 is discharged through the vent branch 13. During this process, the flow rate is obtained by the flow sensor 7 on the drain pipe 5, and the shrinkage of the air-water isolation device 3 is measured by the displacement sensor 8.

[0034] Specifically, in combination Figure 1 The above-mentioned test methods include: The water filling test procedure executes the fluid work process. The controller 18 sends an electrical signal command to open the air inlet valve 12 and the control valve 6 on the water inlet pipe 4, while simultaneously keeping the exhaust valve 14 and the control valve 6 on the drain pipe 5 closed. High-pressure gas from the air pump 15 and the air storage tank 10 enters the air-water isolation device 3 under test through the pressure regulating pipe 11. Driven by the internal air pressure, the isolation device expands, and its volume increase displaces the incompressible water in the lower water tank 2. The compressed water flows upward along the connected water inlet pipe 4 into the upper water tank 1. During the above actions, the controller 18 acquires continuous water flow data through the flow sensor 7 on the water inlet pipe 4 and measures the transient elongation data of the follower 20 through the displacement sensor 8. By comparing the displacement-converted volume with the cumulative volume of the flow sensor 7, the theoretical volume conversion rate of the air-water isolation component when overcoming hydrostatic pressure can be calculated, and the existence of an ineffective expansion dead zone in the device can be identified.

[0035] After the water filling test is completed and before the water draining and venting test is performed, a pressure holding test is conducted. The controller 18 sends an electrical signal command to close the air inlet valve 12 and the air outlet valve 14, and simultaneously close all control valves 6 on the water inlet pipe 4 and the water drain pipe 5.

[0036] All fluid exchange channels inside and outside the air-water isolation device 3 are blocked, and the system enters a static pressure stress state. In this state, the air-water isolation device 3 continuously withstands the interaction between the external static water pressure transmitted by the water body height difference and the internal closed air pressure. The controller 18 monitors the expansion and contraction changes and air pressure changes of the air-water isolation device 3 during the set pressure-holding period through the displacement sensor 8 and the pressure sensor 16. By recording the minute retraction of displacement and the numerical decay of internal pressure during the pressure-holding period, the leakage rate per unit time of the system is calculated, providing data indicators for evaluating the pressure-bearing sealing performance and creep resistance of the isolation device.

[0037] The water discharge test procedure executes the system reset and energy release process. Controller 18 issues a command to keep the air inlet valve 12 and the control valve 6 on the water supply line 4 closed, and to open the exhaust valve 14 and the control valve 6 on the water supply line 5. Water in the high-level water tank 1 flows back to the low-level water tank 2 under gravity via the water supply line 5. The external hydraulic pressure generated by the incoming water in the low-level water tank 2 forces the extended air-water isolation device 3 to contract. The reduced internal volume of the isolation device forces gas to flow through the pressure regulating pipe 11 into the exhaust branch 13 and then into the atmosphere through the open end. During this process, controller 18 acquires water flow data through the flow sensor 7 on the water supply line 5 and measures the contraction amount of the air-water isolation device 3 through the displacement sensor 8. By recording data during this fall-off phase, the reset response time and resistance parameters of the air-water isolation device 3 under external fluid pressure are obtained.

[0038] During the cyclic testing process, the controller 18 alternately and repeatedly executes the water filling test and the water draining and venting test steps according to the preset automated program instructions. Within the set number of consecutive cycles, the air-water isolation device 3 continuously switches between two states: internal air pressure expansion and external water pressure return and venting.

[0039] During multiple volume change cycles, the controller 18 continuously and synchronously collects and stores expansion and contraction data, pipeline flow rate, and air pressure data for each cycle. By extracting and comparing data characteristics from different cycle stages, such as comparing data from the 10th cycle with that from the 500th cycle, the dispersion and offset trends of relevant test parameters are analyzed.

[0040] If, after multiple cycles, the time required to reach the rated water flow rate under a specific input air pressure condition shows an increasing trend, or the maximum elongation extreme value of displacement sensor 8 shows a decrease, it indicates that the structural material of the air-water isolation device 3 has undergone fatigue yielding or that its elastic modulus has decreased. The longitudinal time series data obtained by repeatedly performing fluid assembly actions provides a quantitative analysis basis for the fatigue decay law within the life cycle of the engineering equipment.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An indoor testing device for a telescopic air-water isolation equipment, characterized in that, include: High-level water tank; The low-level water tank, located below the high-level water tank, is used to contain the air-water isolation device to be tested. It is connected to the high-level water tank through water inlet and water outlet pipes. Control valves and flow sensors are installed on both the water inlet and water outlet pipes. A displacement sensor is installed on the outer wall of the low-level water tank to measure the expansion and contraction of the air-water isolation device inside the low-level water tank. The pressure regulating component includes an air storage tank, which is connected to the air-water isolation device after passing through the side wall of the low-level water tank via a pressure regulating pipe. The pressure regulating pipe is equipped with an air inlet valve and an exhaust branch with an exhaust valve. The pressure regulating component controls the volume change of the air-water isolation device within the low-level water tank.

2. The indoor testing device for the telescopic air-water isolation equipment as described in claim 1, characterized in that, The pressure regulating assembly also includes an air pump connected to the air storage tank. A pressure sensor and a pressure regulating valve are provided on the section of the pressure regulating pipe outside the low-level water tank. Along the axial direction of the pressure regulating pipe, the pressure regulating valve, the air inlet valve, the exhaust branch and the pressure sensor are arranged in sequence.

3. The indoor testing device for the telescopic air-water isolation equipment as described in claim 2, characterized in that, The air pump, pressure sensor, displacement sensor, and flow sensor are respectively connected to the controller.

4. The indoor testing device for the telescopic air-water isolation equipment as described in claim 1, characterized in that, The low-level water tank between the pressure regulating pipe and the displacement sensor forms a placement area to accommodate the air-water isolation device, and the detection area of ​​the displacement sensor covers the extension and retraction path of the air-water isolation device.

5. The indoor testing device for the telescopic air-water isolation equipment as described in claim 4, characterized in that, The displacement sensor is equipped with a follower fixed to the telescopic end of the air-water isolation device. The displacement sensor measures the displacement of the follower relative to the displacement sensor and sends it to the controller.

6. The indoor testing device for the telescopic air-water isolation equipment as described in claim 1, characterized in that, Water level sensors are installed in both the high-level water tank and the low-level water tank, and the water level sensors are connected to the controller.

7. The indoor testing device for the telescopic air-water isolation equipment as described in claim 1, characterized in that, One end of the exhaust branch is connected to the pressure regulating pipe, and the other end is open and connected to the atmospheric environment.

8. A test method for an indoor test device for a telescopic air-water isolation equipment, characterized in that, The indoor testing apparatus for the telescopic air-water isolation device as described in any one of claims 1-7 comprises: During the water filling test, the air inlet valve and the control valve on the water supply pipeline are opened, while the exhaust valve and the control valve on the drain pipeline are closed. The gas in the air storage tank enters the air-water isolation device under test through the pressure regulating pipe, causing the air-water isolation device to occupy a larger volume in the low-level water tank, which in turn squeezes the water in the low-level water tank into the high-level water tank through the water supply pipeline. During this process, the water flow rate is obtained through the flow sensor on the water supply pipeline, and the elongation of the air-water isolation device is measured through the displacement sensor. During the venting test, the air inlet valve and the control valve on the water supply line are closed, while the venting valve and the control valve on the drain line are opened. Water in the high-level water tank flows into the low-level water tank through the drain line, compressing the air-water isolation device and reducing its volume in the low-level water tank. The gas inside the air-water isolation device is discharged through the venting branch. During this process, the drain flow rate is obtained through the flow sensor on the drain line, and the contraction of the air-water isolation device is measured through the displacement sensor.

9. The test method of the indoor test device for the telescopic air-water isolation equipment as described in claim 8, characterized in that, After the water filling test is completed and before the water draining and venting test is performed, close the air inlet valve, air outlet valve, and all control valves on the water filling and draining pipelines. Monitor the expansion and contraction of the air-water isolation equipment under pressure holding conditions using a displacement sensor.

10. The test method of the indoor test device for the telescopic air-water isolation equipment as described in claim 8, characterized in that, Alternately and repeatedly perform the water filling test and the water draining and venting test to measure the expansion and contraction and flow rate data of the air-water isolation equipment under multiple volume change cycles.

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