Automatic inflation and deflation device of underground cavern simulation test system

Abstract

The utility model discloses an automatic inflating and deflating device of an underground cavern simulation test system in the technical field of compressed air energy storage. The device comprises a gas storage tank, a first pressure control valve and a gas storage chamber, the first pressure control valve is arranged between the gas storage tank and the gas storage chamber, the gas storage tank, the first pressure control valve and the gas storage chamber are connected through a gas conveying pipeline, the device further comprises a second pressure control valve, a second stop valve and a first stop valve, the gas storage chamber comprises a gas inlet and a gas outlet, and the gas conveying pipeline comprises a gas inlet pipeline and a gas outlet pipeline; one end of the air outlet pipeline is communicated with the air outlet; the gas storage tank, the first pressure control valve and the first stop valve are sequentially arranged on the gas inlet pipeline from front to back; the second stop valve and the second pressure control valve are sequentially arranged on the air outlet pipeline from front to back. The gas storage cavern is communicated with the gas inlet pipeline and the gas outlet pipeline, and is respectively provided with the pressure control valve and the stop valve, so that the gas storage cavern can be circularly inflated and deflated, and the underground cavern can be better subjected to a simulation test more conforming to the working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to compressed air energy storage technology field, concretely relates to a kind of underground cavern simulation test system automatic filling and discharging device. BACKGROUND

[0002] In recent years, large-scale physical energy storage technology represented by compressed air energy storage has attracted widespread attention, and compressed air energy storage technology using artificial underground cavern has become the focus of current compressed air energy storage research and practice due to its flexibility in site selection and wide suitability.

[0003] Currently, there is no compressed air energy storage power station using artificial underground cavern that has been completed and is in commercial operation in China. Most of the research in this direction uses theoretical analysis and numerical simulation methods, which have a large gap with the actual compressed air energy storage operating conditions. Physical model tests have high credibility in revealing the operating and stress characteristics of corresponding projects, so it is necessary to carry out physical model tests for compressed air energy storage underground caverns. However, since the compressed air energy storage caverns undergo four processes of filling, storage, discharging and storage in one operating cycle, the special operating conditions pose great difficulties for the design of the model test system. Currently, there is no automatic cyclic filling and discharging device for physical model tests of compressed air energy storage underground caverns. Thongraksa et al. (2021) once built a simple model test device, in which a pressure valve and a gas storage bottle were used to inject gas into the cavern. However, this device cannot realize repeated filling and discharging, and cannot dynamically adjust the temperature of the gas entering the cavern, which is far from the actual compressed air energy storage operating conditions. Therefore, it is necessary to develop an automatic cyclic filling and discharging device for multi-field simulation test systems of high internal pressure underground caverns. The development of this device will help to truly reflect the actual operating characteristics of compressed air energy storage systems, and is of great significance for promoting the research and practice of compressed air energy storage underground cavern projects. SUMMARY

[0004] To overcome the technical problems that existing underground cavern simulation test systems cannot realize repeated filling and discharging and cannot well simulate the actual compressed air energy storage operating conditions, the utility model provides an automatic filling and discharging device for an underground cavern simulation test system.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The underground cavern simulation test system automatic charging and discharging device contains a gas storage tank, a first pressure control valve and a gas storage cavern, the first pressure control valve is arranged between the gas storage tank and the gas storage cavern, and the three are connected through a gas pipeline, further containing a second pressure control valve, a second stop valve and a first stop valve, the gas storage cavern contains a gas inlet and a gas outlet, and the gas pipeline contains a gas inlet pipeline and a gas outlet pipeline; one end of the gas inlet pipeline is communicated with the gas inlet, and one end of the gas outlet pipeline is communicated with the gas outlet; the gas storage tank, the first pressure control valve and the first stop valve are sequentially arranged on the gas inlet pipeline from front to back; the second stop valve and the second pressure control valve are sequentially arranged on the gas outlet pipeline from front to back.

[0007] In the application, the gas storage cavern is communicated with the gas inlet pipeline and the gas outlet pipeline, and the pressure control valve and the stop valve are arranged respectively, so that the circulating charging and discharging of the gas storage cavern can be realized, and the simulation test of the underground cavern which is more in line with the working condition can be better realized.

[0008] In some embodiments, the gas storage cavern is connected with a pressure sensor to obtain real-time data of air pressure in the gas storage cavern.

[0009] In some embodiments, a control host is further contained, and the first pressure control valve and the second pressure control valve are both signal-connected with the control host; so that the first pressure control valve adjusts the gas inlet rate according to the real-time data obtained by the pressure sensor and the control host instruction; and so that the second pressure control valve adjusts the gas outlet rate according to the real-time data obtained by the pressure sensor and the control host instruction.

[0010] In some embodiments, an air compressor is further contained for inputting compressed gas into the gas storage tank.

[0011] In some embodiments, a pressure reducing valve is further arranged between the gas storage tank and the first pressure control valve.

[0012] In some embodiments, a temperature adjusting device is arranged between the gas storage tank and the first pressure control valve, for adjusting and controlling the temperature of the gas in the gas inlet pipeline.

[0013] The beneficial effects of the utility model are:

[0014] Through the gas storage cavern communicated with the gas inlet pipeline and the gas outlet pipeline, and the pressure control valve and the stop valve arranged respectively, the circulating charging and discharging of the gas storage cavern can be realized, and the simulation test of the underground cavern which is more in line with the working condition can be better realized; and through the control of each component, a variety of working conditions can be realized, both the specified number of circulating charging and discharging test and the long time gas storage test can be carried out. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The structure diagram of the underground cavern simulation test system automatic charging and discharging device provided by the utility model is shown.

[0016] 1-gas pipeline, 2-air compressor, 3-gas storage tank, 4-pressure reducing valve, 5-temperature regulating device, 6-first pressure control valve, 7-first stop valve, 8-gas storage chamber, 9-pressure sensor, 10-second stop valve, 11-second pressure control valve, 12-control host. DETAILED DESCRIPTION

[0017] The utility model is further described below in combination with the drawings.

[0018] In order to make the utility model's purpose, technical scheme and advantage more clearly, following combining with the drawing and example, the utility model is further detailedly explained. It should be understood that the specific example described here is only used to explain the utility model, and is not used to limit the utility model.

[0019] In combination with Figure 1 As shown in the figure, the utility model provides a kind of underground chamber simulation test system automatic filling and discharging device.

[0020] Underground chamber simulation test system automatic filling and discharging device, including gas storage tank 3, first pressure control valve 6 and gas storage chamber 8, first pressure control valve 6 is arranged between gas storage tank 3 and gas storage chamber 8, and three are connected by gas pipeline 1.

[0021] Also include second pressure control valve 11, second stop valve 10 and first stop valve 7, gas storage chamber 8 includes gas inlet and gas outlet, and gas pipeline 1 includes gas inlet pipeline and gas outlet pipeline.

[0022] Gas inlet pipeline one end is communicated with gas inlet, and gas outlet pipeline one end is communicated with gas outlet.

[0023] Gas storage tank 3, first pressure control valve 6 and first stop valve 7 are sequentially arranged on gas inlet pipeline from front to back.

[0024] Second stop valve 10 and second pressure control valve 11 are sequentially arranged on gas outlet pipeline from front to back.

[0025] In the present application, by connecting gas inlet pipeline and gas outlet pipeline with gas storage chamber 8, and setting pressure control valve and stop valve respectively, the circulating filling and discharging of gas storage chamber 8 can be realized, so that the simulation test of underground chamber is better carried out, which is more in line with working condition; and by controlling each component, a variety of working conditions can be realized, both the specified number of cycle filling and discharging test can be carried out, and long time gas storage test can be carried out.

[0026] In the embodiment, gas storage chamber 8 is connected with pressure sensor 9 to obtain real-time data of air pressure in gas storage chamber 8.

[0027] Further, the control host 12 is further included, and the first pressure control valve 6 and the second pressure control valve 11 are both in signal connection with the control host 12; so that the first pressure control valve 6 adjusts the air inlet rate according to the real-time data obtained by the pressure sensor 9 and the instruction of the control host 12; and so that the second pressure control valve 11 adjusts the air outlet rate according to the real-time data obtained by the pressure sensor 9 and the instruction of the control host 12.

[0028] In the embodiment, the air compressor 2 is further included for inputting compressed air into the air tank 3.

[0029] In the embodiment, the pressure reducing valve 4 is further arranged between the air tank 3 and the first pressure control valve 6.

[0030] In the embodiment, the temperature adjusting device 5 is arranged between the air tank 3 and the first pressure control valve 6, for adjusting the temperature of the air in the air inlet pipeline, so that the simulation experiment is more in line with the actual working condition, and the result accuracy of the underground cavern simulation experiment is improved.

[0031] The implementation process of the automatic charging and discharging device of the underground cavern simulation test system provided in the embodiment will be described below in combination with the actual working condition:

[0032] (1) For the cyclic charging and discharging working condition, first, before the charging operation is performed, the pressure reducing valve 4, the first pressure control valve 6 and the first stop valve 7 are kept in the closed state, the air compressor 2 is started, and a large amount of air is compressed to a high pressure state (the maximum pressure is 10 MPa) and stored in the air tank 3;

[0033] (2) Then, the pressure reducing valve 4, the first pressure control valve 6 and the first stop valve 7 are opened, the high-pressure air in the air tank 3 is first reduced to 5 MPa by the pressure reducing valve 4, after passing through the pressure reducing valve 4, the high-pressure air enters the temperature adjusting device 5, and the air temperature is adjusted according to the set temperature value. Then, the heated air enters the first pressure control valve 6, at this time, the operator can send an instruction to the first pressure control valve 6 through the control host 12 to set the air pressure rising rate in the air storage cavern 8, and the first pressure control valve 6 obtains the real-time data of the air pressure in the air storage cavern 8 through the pressure sensor 9, and adjusts the air inlet rate on this basis, so as to ensure that the air pressure entering the air storage cavern 8 changes at a specified rate;

[0034] (3) The second stop valve 10 and the second pressure control valve 11 are opened, and the second pressure control valve 11 is also instructed by the control host 12 to set the air pressure falling rate in the air storage cavern 8, and the second pressure control valve 11 adjusts the air outlet rate after receiving the instruction, so that the high-pressure air pressure in the air storage cavern 8 falls at a specified rate.

[0035] (4) for long time gas storage working condition, the air pressure in the gas storage chamber 8 reaches the specified value after completing the charging operation according to step (2), at this time, the first stop valve 7 and the second stop valve 10 are closed, and the chamber enters the long time gas storage working condition, and the pressure sensor 9 is used to monitor the change rule of the air pressure in the chamber in real time.

[0036] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The automatic filling and discharging device of the underground cavern simulation test system comprises a gas storage tank (3), a first pressure control valve (6) and a gas storage cavern (8), the first pressure control valve (6) is arranged between the gas storage tank (3) and the gas storage cavern (8), and the three are connected through a gas pipeline (1), characterized in that, the device further comprises a second pressure control valve (11), a second stop valve (10) and a first stop valve (7), the gas storage cavern (8) comprises an air inlet and an air outlet, and the gas pipeline (1) comprises an air inlet pipeline and an air outlet pipeline; one end of the air inlet pipeline is communicated with the air inlet, and one end of the air outlet pipeline is communicated with the air outlet; the gas storage tank (3), the first pressure control valve (6) and the first stop valve (7) are arranged in sequence on the air inlet pipeline from front to back; the second stop valve (10) and the second pressure control valve (11) are arranged in sequence on the air outlet pipeline from front to back.

2. The automatic inflation and deflation device of the underground cavern simulation test system according to claim 1, characterized in that, The gas storage cavern (8) is connected with a pressure sensor (9) to obtain real-time data of air pressure in the gas storage cavern (8).

3. The automatic inflation and deflation device of the underground cavern simulation test system according to claim 2, characterized in that, The device further comprises a control host (12), the first pressure control valve (6) and the second pressure control valve (11) are signal connected with the control host (12); so that the first pressure control valve (6) adjusts the air inlet rate according to the real-time data obtained by the pressure sensor (9) and the instruction of the control host (12); and the second pressure control valve (11) adjusts the air outlet rate according to the real-time data obtained by the pressure sensor (9) and the instruction of the control host (12).

4. The automatic inflation and deflation device of the underground cavern simulation test system according to claim 1, characterized in that, The device further comprises an air compressor (2) for inputting compressed gas into the gas storage tank (3).

5. The automatic inflation and deflation device of the underground cavern simulation test system according to claim 4, characterized in that, A pressure reducing valve (4) is further arranged between the gas storage tank (3) and the first pressure control valve (6).

6. The automatic inflation and deflation device of the underground cavern simulation test system according to any one of claims 1-5, characterized in that, A temperature adjusting device (5) is arranged between the gas storage tank (3) and the first pressure control valve (6) to adjust the temperature of the gas in the air inlet pipeline.

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